84 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



front and middle tibiae and tarsi before, tarsal segments 

 ringed with black at apex, yellowish fuscous; sides of 

 basal plates yellow ; wings slightly inf uscated, the veins and 

 stigma fuscous. Length 12 mm dubitata 



6. Ocellar basin with a ridge at middle; abdomen wholly rufous; 



body rufous, with some small spots on head, antennae in 

 part sometimes, prothorax in great part, side lobes of 

 mesonotum in part, mesopleurae in part, pectus, and ab- 

 dominal segments in part, black ; clypeus, labrum, man- 

 dibles at base, a spot on supraclypeal area, inner orbits, 

 beneath eyes, collar, tegulae, and a spot above the coxse and on 



the sides of the basal plates, yellow. Length 11 mm mellina 



Ocellar basin with a furrow at middle ; abdomen not wholly 

 rufous 7 



7. Abdomen black at base and rufous at apex; body rufous, with 



antennal area in part, prothorax in great part, lobes of 

 mesonotum in part, pectus, and three basal segments of 

 abdomen, black ; clypeus, labrum, mandibles, spot above 

 posterior coxae, sides of basal plates, and tarsi and pos- 

 terior tibiae in great part, yellow. Length 12 mm redimacula 



Abdomen black at base and apex, rufous at middle; body 

 black, with clypeus, labrum, mandibles at base, spot on 

 supraclypeal area, collar, scutellum, a spot above posterior 

 coxae, sides of basal plates, and tarsi, yellow ; tegulae, front 

 femora beneath, tibiae for the most part, and abdominal seg- 

 ments two to four, rufous. Length 10 mm neoslossoni 



8. Antennae pale at base or apex 9 



Antennte pale beneath, black above 18 



9. Antennae pale at apex 10 



Antennae pale at base 14 



10. Abdomen bej'ond the basal plates wholly black 11 



Abdomen wholly or in part pale 13 



11. Ocellar basin deeply hollowed out, scoop-shaped, and im- 



punctate; body black, with clypeus, labrum, mandibles at 

 base, antennae at apex, a spot above posterior coxae, and 

 sides of basal plates, yellow; front and middle femora in 

 part, tibiae, and tarsi beneath, rufous; scutellum and meso- 

 notum densely, finely punctate. Length 12 mm nigricoUis 



Ocellar basin hollowed out with a transverse ridge above the 

 middle 12 



12. Anterior femoral pocket yellow; body black, with clypeus, 



labrum, mandibles at base, antennae at apex, collar broadly, 

 anterior femoral pocket, scutellum, spot above posterior 

 coxse, *apex of basal plates, front legs beneath beyond the mid- 

 dle of the femora, and middle legs beneath beyond the apex of 

 the femora, yellow; wings infuscated at apex. Length 12-13 

 mm grandis 



