860 MB. E. I. POCOCK ON SCOEPIOTTS, PEDIPALPS, [NoV. 14, 



Genus AeaNjEthea Butler. 



AeANjETHRA CAjMBEIDGEI Butl. 



Aranceihra camhridnei, Butlei', Tr. Ent. Soc. 1873, p. 175, pi. iv. 

 fig. 8. 



Arancethra ungari, Karsch, Zeits. gesammt. Naturw. li. p. 322, 

 pi. ix. %. 1 (1878). 



Loc. Teruand Vas Eiver (Du Chaillu ; type) ; Lagos {Capt. Elmes) ; 

 W. Africa ; Fernando Po {Mr. Kalhrerjer) ; Accra {G. A. Hightt) ; 

 Loango Eiver {H. L. Ducjgan) ; Benito Eiver {O. L. Bates). 



AEANiETHEA BUTLEEI, Sp. U. (Plate LV. fig. 1.) 



Colour. Carapace, mandibles, mouth-parts, sternum, and coxae 

 reddish yellow ; patella, tibia, and tarsus of palp black ; legs black, 

 the femur of 1st and part of 2ud reddish ; tibise of 1st, 2nd, and 4th 

 pairs with a broad basal yellow ring, the ring incomplete below on 

 the 1st ; upper and lower side of abdomen and the tips of the lateral 

 prominences black ; sigilla reddish. 



Carapace and legs as in A. cambridgei. Abdomen of much the 

 same form also as in that species, about twice as wide as long ; 

 the median portion of the anterior border simply emarginate, with 

 a low tuberculiform prominence on each side ; lateral portion of 

 carapace furnished with five blunt conical lobes, one on the anterior 

 border just iu front of the antero-lateral sigillum, the posterior 

 process lower than the others ; the entire convex posterior boi'der 

 of the abdomen for a space which exceeds half the length of the 

 abdomen without tubercles; abdominal integument punctured as 

 well as striolate ; sigilla very large, the six on the middle of the 

 back arranged in a circular form, the quadrangle formed by the 

 anterior and posterior pairs only, about twice as long as wide. 



Measurements in millimetres.- — Length of abdomen 7, ^^ddth 16. 



Loc. Benito Eiver (6r. L. Bates). 



This interesting new species, which is dedicated to Dr. A. G. Butler, 

 the describer of the genus Arancethra, may be recognized from the 

 typical and hitherto only known species of the genus by the 

 following characters : — 



a. Carapace, sternum, legs, &c. a rich dark red or black 



colour ; underside of abdomen entirely black, a black 



band across the fore part of the abdomen above ; 



margin of abdomen furnished with at least 8 strong 



sharp spiniforu] processes, the posterior not very far 



from the posterior middle line ; sigilla much smaller, carnbridgei Butl. 

 h. Carapace, sternum, coxaj, &c. reddish yellow; tibise of 



1st, 2nd, and 4th legs with a yellow band ; abdomen 



flavous below and without anterior black band above ; 



abdomen furnished with only 5 lateral blunt tubercles, 



the posterior of these being far from the middle of the 



posterior border ; sigilla very large butleri, sp. n. 



