TarantulidflB in the British Museum. 275 



the chiracanthus group. But the diagnosis of Admetus 

 evidently applies to species like /;a/ma<Ms, and not to those 

 like chiracanthus^ and it seems certain that C Koch would 

 not have placed a species related to chiracanthus into Admetus 

 if he had known the adult animal. We may therefore con- 

 clude tliat immilio was merely included in Admetus owing to 

 the accident of the immaturity of the type specimen. 



On tliese grounds I consider that one of the other species, 

 say /uscima7ius, should be looked upon as the type o( Admetus ; 

 and in this case Admetus must be regarded, like Phri/nus, as 

 a synonym of Tarantula. It thus appears that no authors 

 have given a name that can stand to the chiracanthus section 

 of species. I have therefore proposed to term it Hetero- 

 phrynus, with chiracanthus as the type (.Tourn. Linn. Soc, 

 Zool. xxiv. p. 527, 1894). 



To these two genera of Tarantulinse I now propose to add 

 a third, namely Phrynopsis. The three may be diagnosed as 

 follows : — 



a. Without a backwardly directed apophysis 



upon the trochanter of the chelae. Chelae 

 armed with very many spines, short, stout ; 

 femur flat in front, the tibia flat in front and 

 below, nearly straight externally, its upper 

 inner edge more or less produced internally. 

 r/\ Second tarsal segment of the feet partially 



divided by a transverse membranous line ; 



frontal border of carapace denticulate or 



dentate. Tarsus of chela usually armed 



with 6 spines, two of which are much 



longer than the others ; upper edge of 



tibia armed with many long spines .... Tarantula, Fabr. 



Type reniforinis (Linn.). 

 b^. Second tarsal segment of feet entire ; fron- 

 tal border of carapace aimed with long 



spiniform teeth. Tarsus of chela armed 



with but one long spine above and one 



below ; only two of the spines on the upper 



inner edge of the tibia noticeably longer 



than the rest Phrynopsis, g. uov. 



Type spinifrons, sp. n. 



b. With a backwardly directed apophysis on the 



trochanter of the chela. Chelte armed with 

 fewer spines, long and slender ; the femur 

 and tibia nearly cylindrical, the latter dis- 

 tinctly bowed. (Second tarsal of foot 



undivided.) Heterophrynus, Pocock. 



Type chiracanthus (Gerv.). 



To the structural features already mentioned by Simon as 

 characteristic of this subfamily may be added the entire 

 absence of the small semicircular appendages which are found 



