60 



Psyche 



[April-June 



is no circular mouth-opening, which at once removes Trachypetus 

 from the several subfamilies of the group Cyclostomi, with none 

 of which it has otherwise any characters in common, except per- 

 haps the fact that the abdomen resembles slightly that of some 



Fig. 1. Trachypetus clavahis Guerin; body from above and head from the front; 

 wing of Sphseropyx above, of Trachypetus below. 



Stephaniscinae. It could not possibly be placed in this group and 

 must fall in the Polymorphi, with several groups of which it appears 

 to be allied, although not easily referable to any one of them. 



