176 Mv. A. G. Butler's 
(possibly due to its siccate condition); foiu'teen to fifteen 
more or less prominent subconical teeth on front margin, 
depressed over ceplialothorax, and twelve, more robust, at 
equal distances round outer margin, strongly depi'essed 
and obtusely acuminate. 
Ceplialothorax above dark castaneous, Avith anterior 
margin black ; falces black, terminal claw castaneous ; 
labium, sternum, maxillre and legs shining lilack ; ab- 
domen fulvous, varied with pale olivaceous in front; the 
impressed spots deeper or lighter fulvous, with brown 
centres ; spines or teeth dark castaneous at base, but 
becoming black, varied with testaceous, towards apex ; 
ventral surface black, irregularly clouded here and there 
Avith testaceous patches ; two series of impressed sub- 
marginal spots along front, and one round outer margin. 
Fernand Vas Kiver, AVest Africa, Du Chaillu. 1 speci- 
men. B.M. 
I feel great pleasure in naming this truly remarkable 
species after my friend the Kev. O. P. Cambridge, to 
whom I am much indebted for assistance received since I 
took up the study of Apterous Insects ; it resembles very 
remarkably'the crustacean genus CEthra (near to Crypto- 
podia). Mr. Pickard Cambridge tells me that he pos- 
sesses two fine examples, and that there are several others 
in the University Museum at Oxford, all from Africa ; its 
nearest ally, so far as I can judge from the figure, is the 
Gasterocantlia Gayi of Nicolet. 
I had some thoughts of separating this as a genus from 
Gasteracantlta; it however differs little more than several 
of M. Simon's sub-genera ; I have, therefore, retained it 
in the genus, merely distinguishing it as INI. Simon has 
done with other forms by a sub-generic name. 
The following species are vmknown to me, and may, 
perhaps, not belong to this genus : — - 
105. G. sector. 
Aranca sector, Forskael, Deser. anim. p. 85 ; pi. 
25, fig. C (1775). 
Asia, Arabia. 
106. G. splssa. 
Gasteraconiha sjnssa, Xicolet, Gay's Chili, 4, p. 
475, n. 4 (1849). 
Chili. 
Described as follows— " thorax brown, pale yellow in 
front; abdomen transversely ]iaralle1ngram-sha]icd, multi- 
spinose ; legs pale yellow, annulatcd with black." 
