28 



females being- found in no other group afong the Hymenoptera" 

 (Mon. N. A. Proct. p. 8i). I am unable to see in what possible 

 way the remarkable and highly evoluted form of the front legs 

 can in any way affect this matter, for, surely, it has no phyloge- 

 netic significance, being in no way homologous with the chelate 

 legs of other orders of insects. Moreover, in existing species 

 oi the Dryinidae we can clearly see how the highly modified 

 chelate tarsus of such a form as Dryinus or Gonatopus has 

 arisen within the limits of the family from the simple non-chelate 

 tarsus of such a form as Aphelopus. It is from these simple 

 forms that the afifinities of the Dryinidae must be judged. 



SYSTEMATIC ACCOUNT OF THE DRYINIDAE. 



The following list comprises all the species specially consid- 

 ered in this paper, and I may add that the species first described 

 in each new genus is to 'be considered as the type of that genus. 

 It will be observed that the generic characters are all drawn 

 up from female examples, although I have added a short table 

 ol characters that distinguish the males in a considerable num- 

 ber of genera. Similarly in only a few cases are the males of the 

 various species described, in fact only in those cases, where there 

 is no doubt whatever that they are rightly assigned to their 

 partners. Where one sex only is described, it is always the 

 female; where both sexes are described, that of the male always 

 follows the description of the female. Had I cared to describe 

 males, which cannot at present be certainly associated with their 

 females, the list of new species would have been greatlv increas- 

 ed, but it would have served no useful purpose to do this, since 

 in many cases the males of species, most distinct in the other 

 sex, are hardly separable specifically. 



In the list, all species marked with an asterisk have had the 

 mouth parts dissected and examined in balsam; others have had 

 them, totally or partially dissected out, and examined dry; while 

 some from their very close relationship to other species I have 

 not thought it necessary to examine thus minutely. 



PSEUDOGONATOPUS, g. nov. 



1. P. kurandae,'sp'. nov.* 6. P. americanus, sp. nov.* 



2. P. juncetorum, sp. nov. /. P. opacus, sp. nov. 



3. P. palustris, sp. nov.* 8. P. stenocrani, sp. nov.* 



4. P. saccharetorum, sp. nov. var. dubiosus, var. nov. 



5. P. dichromus, sp. nov.* 



