TWO NEW BAT-M1TX:S 305

Two new Bat-Mites of the Genus Ancystropus (Acarina : Spinturnicidae).

By CHARLES D. RADFORD, P.Z.S.

[Received March 10, 1947.1

(With 10 figures in the text.)

INTRODUCTION. The bats are parasitised by mites of the families Listrophoridae, Liponyssidae,

Sarcoptidae, Spinturnicidae and the subfamily M y o b i i w . The family Spinturnicidae comprises the large mites of the genera Spinturnix, Ancystropus, Periglisehrus and Tympanospinctus.

Two new species of the genus Ancystropus Kolenati, 1856 have been sent to nie recently for identification from Celebes and Kenya. The subgenus ,Vteristaspis Kolenati, 1857 has the pulvillus of the legs well developed, but in the genus Ancystropus the pulvillus of legs is obsolete or absent, (Hirst, 1923). In the type species Ancystropus zekbori Kolenati, 1856, the pulvilli are well defined on tarsi ii-iv (Hirst, 1923, p. 978, fig. 6). The separation ofthe subgenus Xeristaspis appears not warranted upon such slender points of difference, and for this reason the two new species have been placed in the original genus.

The author wishes to express his thanks to Dr. Karl Jordan, F.R.S., Tring Museum, Herts, from whom many interesting specimens of ecto-parasitic mites have been received, for the specimens from the Celebes. To D. G. MacInnes, Esq., of the Coryndon Museum, Nairobi, Kenya, I wish to tender my thanks for the donation of the other species herein described.

The drawings have been made with the aid of an eye-piece (squared) micrometer.

Family SPIN T U R N I c I D A E Oudemans, 1901.

Genus ANCYSTROPUS Kolenati, 1856.

ANCYSTROPUS KENYAENSIS, sp. n.

The male venter (fig. 1) shows the ventral scutum to occupy the greater part of the space between coxae i and iii, it is provided with the customary three pairs of sternal spines. Genital pore in anterior margin of the ventral scutum, with the jugular scutum lying anterior to the pore. The posterior tip of the ventral scutum has a less strongly chitinized scutum surrounding it which is concaved to accommodate the bases of the four setae lying between coxae iii. Lying between coxae iv there are three pairs of spines and a pair of terminal spines on the anal scutum flanking the anus. Chaetotaxy of the legs as in the figure. Inner margin of coxae i is concaved deeply round the jugular scutum.

The male dorsum (fig. 2) shows the dorsal scutum to cover most of the dorsal surface, ornamented with several punctations but without spines. On the uncovered part of the dorsum there is a pair of anterior spines ; a second pair of spines level with cox= ii ; there is a pair of shorter spines between coxae ii and iii ; between coxae iii and iv there is a pair of spines and another pair posterior to coxae iv. Each of these lateral dorsal spines is short,, stout and possesses lateral barbs. At the posterior tip of the dorsum there are two pairs of short, stout spines.

Ventrally there are no large, stout spines.

306, CHARLES I). RADFORD

Figure 1.

Ancystropus kenyuensis, sp. n. Venter of male

Figure 2.

A)icystropus kenyaensis, sp. n. Dorsum of male.

TWO NEW BAT-MITES 307

Chaetotaxy of the legs.-Leg i. Has two long, stout spines dorsally on the femur directed backwards, with a shorter spine close to the trochanter ; the tibia is also provided with three stout spines, shorter than those on the femur. All these six spines have lateral barbs. The tarsus possesses a number of spines of which three are seen to be hollow (acanthoides Grandjean) at3 in the female (fig. 6).

Leg ii. Trochanter possessing a stout, barbed spine on its anterior margin ; femur and tibia each with two stout, barbed spines.

Leg iii. Trochanter with one long, stout, barbed spine; femur with a pair of stout, barbed spines.

Leg iv. Trochanter with one long, stout, barbed spine ; femur with two long, stout, barbed spines.

Figure 3.

Ancystropus kenyaensis, sp. n. Male chela.

Figure 4.

Ancystropw kenyaensis, sp. n. Venter of female.

Stigma lying between coxae iii and iv with short, stout peritreme extending to space between coxae ii and iii.

The chelicerae are difficult to see in the specimens available, only one specimen showing a single arm which is sufficiently clear for drawing. This shows the dentition (fig. 3) to be a sharp distal tooth, four teeth close together, then three larger teeth and a short proximal tooth. The other process of the chelicerae is also dentate but it is not clear enough to illustrate. In addition to the two dentate processes there is a long, stout, curved process (Spermato- phorentrager) borne on each mandible.

The female venter (fig. 4) shows the jugular scutum to be broad and short, with projecting postero-lateral corners. The sternal scutum is broad, sac-like, lying between coxae i and iii, furnished with one pair of spines and a pair of

.

306 CHARLES 1). RADFORD

pores. Surrounding the scutum is a less strongly chitinized scutum upon which is the second and third pair of sternal spines and the second pair of sternal pores.

The genital spines are placed on a small genital scutum level with the space between coxae iii and iv. The metapodal spines are close to the inner edge of coxae iii. Three pairs of spines lie on the uncovered venter between cox* iv and the posterior end of the body. There is a pair of spines on the posteriormost tip of the body.

Legs i with a number of stout, lateral spines which are placed upon chitinized ridges. Coxae i with a chitinized, spur-like, posterior process. Coxae ii with a tooth-like anterior spur and a calcarized posterior process. Coxae iii with an anterior and two posterior processes. There is a long, stout spine posteriorly on coxae ii and iii.

The female dorsum (fig. 5) shows the dorsal scutum to be broadly pear- shaped, its anterior end broadest ; without spines but bearing a number of

Chaetotaxy of the legs as figured.

Coxae iv with an anterior process.

Figure 5.

A-lncystropus kenyaensis, sp. n. Dorsum of female.

punctations. The dorsal scutum covers only the median anterior portion of the dorsum leaving exposed a wide lateral margin ; posterior tip of the scutum extending to the level of coxae iv ; dorsum posterior to coxae iv exposed. Dorsum with lateral incisions posterior to coxae iv. ,Spines on lateral edges of the dorsum mainly as in the male.

Chaetotaxy of the legs.-Leg i. Three spines on the femur which are long, stout, with lateral barbs ; three somewhat similar spines on the tibia, and two on the genu. As in the male there are three hollow spines (acanthoides) on the tarsus in addition to a number of other spines. In addition there are two stout, paddle-like spines a t the distal end flanking the tarsal claws, (fig. 6).

Two long, stout, laterally barbed spines on the tibia and genu. One long, stout, barbed spine on the trochanter ; two long, stout,

One long, stout, barbed spine on the trochanter ; two similar

Leg ii. Leg iii.

Leg iv. barbed spines on the femur and tibia.

barbed spines on the femur, and two stout, barbed spines on the tibia.

TWO NEW BAT-MITES 309

Chelicerae are dentate, the movable (1) process showing three large teeth ;

Memuremenk--6 0.45 x 0.4 mm. ; 9 0.9 x 0.6 mm. (without capitulum). Host.-Fruit bat (Eidolon helvum Kerr). Locality.-Kaimosi, Kenya, 1947. MateriaL-The allotype and holotype specimens are in the British Museum

(Nat. Hist.), paratypes (male and female) in the U.S. National Museum, Washington, U.S.A., and the author’s private collection.

the fixed process with two teeth (fig. 7).

Figure 6.

Ancystropus kpriyaen.yi6 sp. n. Dorsum of tarsus i

Figure 7.

Ancystroprn kmqrienni.9. sp. n. Female chelicera.

ANCYSTROPUS JORDANI, sp. n.

The male venter (fig. 8 ) shows the unusual shape of the ventral scutum, flask-shaped, longer than broad, occupying a large area between coxae i and coxae iii. First pair of sternal spines between coxae i a t the narrow neck of the scutum ; second pair of spines level with coxae ii, a t the shoulders of the scutum ; third pair of sternal spines between coxae iii, not on the posterior edge of the scutum. Two pairs of pores are borne upon the scutum. Genital pore lying a t the anterior end of the scutum ; jugular scutum anterior to the genital pore. Posterior to the ventral scutum there is a transverse line of four stout spines. Posterior to this transverse line of four spines and lying between coxae iv there are three pairs of spines, the anterior pair being smaller than the second and third. On the posterior margin of the venter there are four sinall spines.

On coxae ii, iii and iv there is an anterior spur ; coxae ii and iii each bearing a stout spine posteriorly. Legs i stout, typical of the genus, with chitinized ridges on the coxae. Legs ii the shortest ; legs iv of exceptional length.

The female venter (fig. 9) shows the jugular scutum lying between coxae i ; the sternal scutum lies between coxae i and iii, is broadly pentagonal, its surface pitted; bearing three pairs of spines and two pairs of pores. Metopodal spines lying between coxae iii and iv. Genital scutum level with coxae iv

Chaetotaxy of the legs simple.

Dorsum mainly as in the female (fig. 10).

310 CHARLES D . RADFORIJ

Figure 8.

Ancystropus jordani, sp. n. Venter of male.

Figure 9.

Ancystropzis jordani, sp. n. Venter of female.

TWO NEW BAT-MITES 31 I

and bearing the pair of genital spines. A pair of small spines lies between coxae iv ; three pairs of long, stout spines are placed between coxae iv and the posterior end of the body. There is a pair of small spines anterior to the anus and flanking the anus there are two spines on each' side.

Several stout spines laterally on the femur, tibia, genu and tarsus ; spur-like lateral processes on the genu and tarsus, with a tooth-like process a t the base of the tarsal claws.

A tooth-like process on the anterior edge of coxa ; stout spines on the postero-lateral edges of each segment.

With few stout spines.

Chaetotaxy of the legs.-Leg i.

Leg ii.

Leg iii. Leg iv. Spines simple. On the tarsus of legs i-iv there is a long, slender spine close to the base of

Coxae i-iii each bearing a long, stout spine; chitinized the tarsal claws. ridges on coxae i and ii.

Figure 10

Ancystropusjwa!uni, sp. n. Dorsum of female.

The female dorsum (fig. 10) shows the dorsal scutum to cover the body ; provided with transverse ridges and pores. A pair of stout spines lies between coxae i close to the anterior edge of the body ; a pair of spines lies between coxae i and ii ; a pair of spines between coxae ii and iii ; above coxae iv there is a pair of spines. Midway between the posterior tip of the dorsum and coxae iv there are two pairs of long, stout, peg-like spines, borne upon ridges.

Chmtotaxy of the legs.-The dorsal surface of the legs in the genus Ancystropw would appear to be provided with a number of long, stout spines with rough edges. In the present species these spines have rough edges but are not barbed as in A . kenyaensis, sp. n. Dorsally there are two broad, spear-like spines distally near the tarsal claws.

Measurements.-d 0.47 x 0-3 mm. ; Host.--A bat.

0.84 x 0.5 mm.

312 TWO NEW BAT-MITER

Loca1ify.-Koelawi Paloe, W. Celebes, March 1937 : J. P. A. Kalis. Material.-The allotype and holotype specimens are in the British Museum

(Nat. Hist.), paratypes in the author’s private collection, and paratype female iri the US. Natioiial Museum, Washington.

REFERENCES. GRANDJEAN, F. (1935). Les Poils et les Orgsnes Sensitifs por tb pw les Pattes et le Palpe

HIRST. 8. (1923). On some new or little-known species of Acari. Proc. zoo!. Soc. Lond.

KOLENATI, P. A. (1S56) . Die Parasiten der Chiropterw. Vers. dtsch. ) L < ~ ? L T ~ . i lerzt?, Dresden, 25-29.

KOLENATI. F. A. (1858). S.B. Aknd. H’~,Q.Y. Wim, 35, 155-90.

chez lea Oribates. Bull. Soc. 2001. Fr. 60, 6-39.

1923. 971-1000.

Beitriig zur Kenntniss der .;2rachnicten.