1900.] INSECTS AND ABACHNIDS FKOM SOMALILAND. 51 



them and the marginal groove on each side another similar but 

 curved groove which extends from in front of the middle of the 

 dorsal area back as Par as the posterior end of the marginal groove; 

 in addition to the punctures in the grooves there are a few coarse 

 punctures scattered here and there ; posterior border with eleven 

 festoons. Adanal plates narrowed in front, but not extending far 

 forwards beyond the anus ; their inner border nearly straight, 

 external border convex ; posterior border produced into a short 

 external and a long spiniform internal tooth, which projects 

 nearly as far back as the posterior border of the dorsal plate, the 

 apex of this spine is obliquely truncate and subbifid, above it is a 

 second strong spine; a pair of postanal sclerites. Coxte oi 1st 

 leg strongly bidentate; of 2nd to 4th also bidentate, the two teeth 

 being on the posterior border, one proximal, the other distal and 

 thinner. Total length 4-8 mm. 



Two undistended female specimens, probably referable to this 

 species, have the cephalic plate about as wide as long, reddish in 

 the middle, blackish at the sides, the cervical grooves deep, a row 

 of large punctures representing the marginal grooves on each side, 

 some large punctures along the lateral edge in front of the eye, a 

 few between the cervical grooves, and a few large ones and many 

 smaller ones on the middle of the posterior area. The abdomen is 

 impressed posteriorly with three shallow grooves and is obsoletely 

 festooned. Cud\i^ of the legs posteriorly weakly bispinate, the 

 external spine being the larger. 



Lor. Bularli in We.st 8omaliland (May 1895). 



Six specimens. Type (male) and two co-types (male and 

 female) in the British Museum. Three co-types (2 males and 

 1 female) in the Hope Museum at Oxford. 



The males of the three species of this genus obtained by 

 Mr. Peel may be determined as follows : — 



(cJ) a. Dorsal plate, marked behind with a pair of moderately 

 long grooves, one on each side of the middle line ; 

 between these and the deep marginal groove there is a 

 third long and deep groove extending from the second 

 or third sulcns of the festooned border past the middle 

 of the dorsal plate ; adanal plate produced behind into 

 a long and strong spiniform process, immediately above 

 which there is a second strong spine ; a pair of chiti- 



nous postanal sclerites armafu.%. 



b. Dorsal plate with a longish posterior median sulcus and 



a pair of shallower impressions, one on each side of it, 



with only a very short shallow and inconspicuous groove 



between the marginal groove and tJie middle line ; adanal 



plate not produced behind into a long spiniform process ; 



no spine above the termination of this plate. 



a'. Dorsal plate yellowish white, with large symmetrically 



disposed reddish -brown patches ; legs brown, painted 



with white above ; dorsal plate sparsely punctured ; 



marginal groove represented by a series of punctures, marmorcus. 



b'. Dorsal plate deep brown with blacker patches and 



yellow lateral margin ; legs uiiifornily brown ; dorsal 



plate closely and irregularly punctured ; marginal 



groove distinct sangmncus, 



4* 

 [49] 



