angle to meet the superior angle of the second 

 cubital cellule, which is triangular: tergum 

 with an obsolete transverse groove on the middle 

 of each segment, and a marginal slender one ; 

 posterior submargins yellow : feet rufous : pectus 

 black : venter dull rufous. 



OBSERVATIONS. 



The specimen which served for this descrip- 

 tion is a male, which was taken in the same 

 country as the preceding. It corresponds with 

 the canalicidatus in the simple form of its eyes 

 and mandibles, and in the shape of the radial 

 and second cubital cellules. These characters 

 justify the separation of the two species from 

 the foregoing, into a distinct subgenus. 



The lower left figure of the plate. 



PLATE 49, 



