38 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



head, mesal surface of the basal segment of antennae, apical 

 half of antennae, genae, a line on the outer orbits adjacent 

 to the eyes, a spot on the posterior orbits, tegulae, and 

 the legs below the coxae, except the posterior tibiae, white; 

 abdomen with segments three and four entirely, the basal 

 half of five, and a line on six, rufous- Length 11 mm. 



transversus 

 Head not with a strongly elevated V-shaped ridge behind 

 the median ocellus; body black, with mandibles, declivous 

 part of the head, a line on the posterior orbits, a spot 

 on each side of the postocellar area, a spot on each side 

 on the caudal margin of head, tegulje, scutellum, post- 

 scutellum, and legs beyond the coxae, yellow. Length 

 8 mm rufocinctus 



5. Pleurae with a pale mark; body black, with clypeus, poste- 



rior orbits, genae, a broad band from the middle of 

 the eye to the occiput, two prominent, triangular-shaped 

 dilations on the inner side near the eye, two parenthesis- 

 shaped spots near the postocellar area\ three minute 

 spots on the front, tegulae, V-spot, scutellum, postscutel- 

 lum, front and middle legs, and posterior trochanters and 

 femora, yellow; mandibles, posterior tibiae and tarsi, and 

 abdomen beyond the basal plates, rufous. Length 9 mm. 



persicus 

 Pleurae without a pale mark 6 



6. Labrum with a small median tooth 7 



Labrum broadly rounded without a median tooth; ocellar 



basin sharply defined, a V-shaped ridge behind median 

 ocellus and two broad mounds in front; body in female 

 black, with apical half of antennae, clypeus, lower half of 

 the outer orbits, a line on the genae adjacent to the eyes, 

 a bifid dilation on the inner orbits extending as a line to 

 the occiput, its inner margin extending to the vertical fur- 

 rows, ridges about the ocellar basin, a spot on each verti- 

 tical furrow, tegulae, a line on the collar, the V-spot, 

 scutellum, postscutellum, and the legs below the knees, 

 white; abdomen rufous beyond the basal plates. Male 

 differs in having the area in front of the frontal crest and 

 the basal segment of antennae yellow, spots on the orbits 

 and vertex wanting. Length 8-10 mm dentatus 



7. Median fovea wanting; ocellar basin strongly defined; body 



black, with apical half of aiftennae, clypeus, base of mandi- 

 bles, lower half of posterior orbits, area around ocellar 

 basin, a spot on each vertical furrow, a line from the 

 middle of the inner orbits to the occiput (enlarged at 

 occipital end), tegulae, prosternum, and legs beyond the 



