744 Mb. r. I. POCOCK OK etSioPiak smbers. [June 15, 



the Phlogieae, most of the Oriental genera of his Selenocosmiese, 

 one genus of his Poecilotheriefe, and one that would fall into his 

 Ischnocolese. The Ornithoeloniuae contain the rest of the Oriental 

 genera of his Selenooosiniese. 



But in addition to the Oriental genera, Mons. Simon referred 

 to the Selenoeosmiese a considerable number of genera from 

 Africa. It is these genera, together with the remaining genus of 

 the Pcecilotheriese, and several additions that constitute the subject- 

 matter of the following pages. 



These genera appear to me to fall into two well-marked sections, 

 as arranged on the synoptical table. The first of these is no doubt 

 a perfectly homogeneous assemblage, comparable to the Oruith- 

 octonini or Selenocosmiinffi of the Oriental Jlegion. The second 

 section seems to me as a whole to be inseparable from the genera 

 inhabiting South and Central America and the Mediterranean 

 district of the Palsearctic Region. I have consequently grouped 

 them provisionally (that is to say, pending a further examination 

 of the S. American forms) as Theraphosiuae. This subfamily is, 

 however, very heterogeneous ; but to what extent it will ultimately 

 prove divisible into minor groups must for the present be left an 

 open question. M}' views respecting the classitication of the 

 Therapliosidte may be briefly epitomised as follows : — 



a. With a feathery scopula on the external surface 



of the mandible. 



a' . A stridulatiug organ present and consisting 



of a few enlarged plumose hairs on the 



mandible set in \ibration by short spikes on 



the adjacent surface of the maxilla ; sternal 



sigilla remote from the margin, &e Ornithoctonin-b. Oriental 



Eegion. 



b'. Without a stridulating organ, or when 



present one consisting of bristles derived 



from the oral fringe on the mandible and 



a cluster of plumose hairs on the maxilla ; 



sternal sigilla marginal, &c Harpactirin^. South and 



East Africa. 



b. Without a feathery scopula on the outer 



surface of the mandible. 

 a^. A stridulating organ present, and con- 

 sisting of a cluster of bacilliform spines 

 on the maxilla, and a series of spines or 



spiniform hairs on the mandible Selenocosmiin,e. Oriental 



Region and Australia. 

 b^. Without any stridulating organ between 



the mandible and maxilla Tiieraphosin.!:. Tropical 



and Subtropical America, 

 Madagascar, Ethiopian 

 Region, Mediterranean 

 area of Paliearctic. 



These sections may be compared with Simon's "groups" as 

 follows : — 



OrnithoctoninsB ( = Selenoeosmiese in part). 

 HarpactirinsB (= Selenoeosmiese in part). 



