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



Antennae with a pale annulus; head and thorax black. Length 

 14-16 mm insolens 



£2. Only first dorsal abdominal segment black S3 



First to fourth dorsal abdominal segments more or less black 

 at base; scutel yellow. Length 15-16 mm succinctus 



53. Hind legs entirely black 54 



Hind legs only mostly black, their tibiae with a white line or 



spot laterally toward base; scutel white; scape entirely 

 black. Length 14-20 mm devinctor 



54. Head subquadrate; cheeks convex. Length 17-25 mm...grandis 

 Head subtriangular, cheeks flattened; scutel black; postpeti- 



ole scratched. Length 12.5-17.5 mm rufiventris 



55. Antennae with a pale annulus 56 



Antennae without a pale annulus 61 



56. Hind coxae black, or black and white, or black and yellow; 



gastrocoeli elongate, linear, subobsolete, or wanting 57 



Hind coxae reddish 60 



57. Clypeus either concave or with a more or less distinct me- 



dian impression or fovea 58 



Clypeus flat or subconvex, not excavated medially; abdomen 

 above fulvous, generally more or less marked with fus- 

 cous. Length 6-9 mm scitulus 



58. Clypeus with a more or less distinct median impression 



or fovea; abdomen above uniformly fulvous or reddish. ... 59 

 Clypeus broadly concave; abdomen above mostly fulvous, 

 and generally with fuscous spots on second to fourth seg- 

 ments. Length 14-17.5 mm w-album 



59. Length 11-13 mm.; hind femora not reddish duplicatus 



Length 8-9 mm.; hind femora reddish duplicatiformis 



60. All dorsal abdominal segments black and reddish; length 9 



mm.; body, at least above, closely punctate; areola sub- 

 quadrate, bounded anteriorly by a groove separating it 

 from postscutel; face below insertion of antennae and or- 

 bital margins, yellow; orbital yellow mark not completely 

 bounding eyes; lateral margin of pronotum, a line beneath 

 each wing, greater portion of scutel, fore coxae, greater 

 part of mid coxae, fore trochanters and mid trochanters, 

 yellow; spurs whitish; antennae various shades of brown, 

 and with a yellow annulus, owing to fifteenth to twenty- 

 second joints being entirely or mostly yellow; scape brown- 

 ish yellow; mesopleurae and propodeum partly, hind coxae 

 almost entirely, trochanters, femora and part of tibiae of 

 hind legs, apical fourth of first abdominal segment, sec- 

 ond and third dorsal abdominal segments, greater part 

 of each succeeding segment, and abdomen beneath, except 

 first segment, various shades of red; wings subhyaline, 

 tinted with brown; veins dark brown, stigma pale brown 



quintills 



