1922] Conoaxima 155 



nest of Azteca. Without doubt, the Central American species 



is also a parasite of these ants. 



The two species may be distinguished as follows: 



Frontal projections spiniform, acute, much longer than broad 

 at base; median projection of pronotum acute; scape of 

 antennae black or piceous; C aztecidida sp. nov. 



Frontal projections triangular, as high as broad at base; median 

 projection of pronotum rounded; scape of antenna; more or 

 less ferruginous, especially toward base . . C. affinis sp. nov. 



Conoaxima aztecicida sp. nov. 



9. Length 4.2 mm. Black; abdomen obscurely stained 

 with rufous at the sides of the sixth and base of the seventh 

 segment; antennal scape entirely, pedicel, except above; knees, 

 tibia? and tarsi of front legs; knees and apices of tibiae of four 

 posterior legs, yellow; middle and hind tarsi, except tips, white. 

 Body clothed with white, bristly hairs, one arising from 

 each puncture on the thoracic nota, with a denser patch on the 

 metanotum and hind coxa below; tip of abdomen also white 

 haired; legs clothed with white hairs which form quite a distinct 

 fringe on the hind femora beneath. Head closely and densely 

 punctate, each puncture about half as wide as the diameter of 

 the scape and almost everywhere so close together that the 

 space between them forms an irregularly hexagonal reticulum. 

 Lateral ocelli much closer to the eye than to the median ocellus, 

 the lateral ones oval, separated by their own width from the 

 eye; frontal spine just in front and slightly toward the median 

 line from the lateral ocellus; head seen from above two and one 

 half times as broad as thick, with the eyes extending almost to 

 the front and to the temples. Antennal scape extending to the 

 median ocellus, less than half as long as the flagellum; pedicel 

 narrower than, and only half as long as the first funicular joint; 

 one ring-joint; the five funicle joints growing thicker and 

 slightly shorter, first one oval, twice as long as thick, fifth but 

 little longer than thick; club composed of three distinct joints, 

 as long as the two preceding funicular joints together, entire 



