of some Oriental Genera of My ^Q\oTi\oxxi\idi. 169 



At present I am disposed to think that, on the whole, the 

 most primitive of these groups is C or D. For example, 

 the strikers on the mandible in C are much less specialized 

 than in A or B, since they are clearly nothing but long 

 thickened hairs, whereas in A and B the hairs have been 

 modified into granuliform spicules or genuine rigid spines. 

 Moreover, A appears to be more specialized than B in the 

 great development of its scopulas, which, I take it, is a criterion 

 of specialization. In the same way E is more specialized 

 than C, and thus approaches A; and, lastly, if the larger 

 size of the fourth leg is a primitive character, as seems not 

 unlikely, the group t> is more primitive than 0. 



N.B. — The species coming from British India, Burma, and 

 Ceylon, which are here briefly described, I propose to discuss 

 at greater length on some future occasion. 



Synoijsis of the Genera. 



a. Coxa of palp fumislied inside with scattered irre- 



gularly arranged longer and shorter spines and 

 spiniform setse ; without a fringe below the 

 suture ; mandible with a few irregularly ar- 

 ranged, long, stout, but apically filiform setae, 

 mixed up with the inferior fringe of red hairs. . Haploclastus, Sim. 



b. Coxa of palp furnished inside with a cluster or 



row of club-shaped rods. 



a}. The outer surface of the mandible furnished 



below and behind with long stout seta3, as in 



Haploclastus ; the inner surface of the coxa 



of the palp without so definite a fringe below 



the suture, the " keys " composed of a thick 



cluster of club-shaped rods (except Psalnio- 



pceus). 



a^. Legs of the fourth pair noticeably stronger 



than those of the first and clothed dis- 



tally with long erect setae ; tarsal pads of 



the fourth leg completely divided by a row 



of setse. 



a^. The fourth leg stouter than the first, its 



protarsal pad entire and extending, at 



least on the inner side, almost up to the 



