222 Journal New York Entomological Society, t^'o'- xxiv, 



ocellus and between the posterior ones which appear sunken behind 

 the large, prominent carina; these carina; start in front of the poste- 

 rior ocelli and extend transversely toward the eyes, becoming grad- 

 ually elevated and ending in the form of a pair of horns; ocellar 

 grooves situated dorso-laterally to the posterior-ocelli ; above, the 

 vertex is sparsely punctured and narrow ; cheeks well punctured. 



Thorax black, disk very large, shining and hairy; hairs black, 

 short and sparse on the back and sides, longer beneath ; scutellum 

 large and little rounded, the greater part impunctate, without pile, 

 forming the hind part of the disk, only the posterior margin pilose; 

 post-scutellum with hair everywhere. 



Abdomen black, rather long but robust, punctation sparse except 

 on the apical segments, hairs black, a faint carina along the middle 

 extending the length of the tergum, and a very sharp and prominent 

 one on the venter ; epipygium not wide at the base, spines very large. 



Wing opaque, the dominant color blue with tints of violet and a 

 slightly greenish luster at the apex; tegulae black. 



Legs black, the hairs black ; tibial scale well elevated, the two teeth 

 at the apex of equal size, rather short, the anterior one a little more 

 pointed, the posterior one striated on its posterior aspect. 



Male. — Differs from the female in that it is entirely fulvous and 

 also in the following points : Head narrow, punctation very fine ; 

 mandibles brown with a yellow spot at their base, black toward the 

 apex, smaller, greatly constricted along the middle, no tooth on the 

 upper margin ; labrum with only one lobe, triangular in form ; clypeus 

 flatter, the upper margin and sides not elevated ; frontal shield some- 

 what convex, the frontal carina replaced by a short groove concur- 

 rent with the median ocellar groove ; ocelli not sunken, the median 

 one situated but little lower than the posterior ones, a very shallow 

 circular pit behind each posterior ocellus which has no carina in 

 front of it; antennae fulvous on the under side throughout, reddish- 

 brown on the upper surface which has a fine white pubescence on 

 its flagellum; vertex and cheeks with long dense fulvous hairs. 



Thorax fulvous, the scutellum much flatter, the post-scutellum 

 very wide and more densely pilose. 



Abdomen with more brown color than on the other parts of the 

 body, the hair yellow except at the apex, where it is long and red- 

 dish. Wings semihyaline, teguhe fulvous, covered with hairs except 

 on the middle. 



