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



prothorax for the most part, a spot on each side of me- 

 dian lobe of mesonotum, tegulae, knees, and abdominal 

 segments one to five, rufous; wings yellowish hyaline, 

 paler at base. Length lo mm stugnus 



27. Head with a carina behind the eyes between the occiput and 



posterior orbits 28 



Head not with a carina behind the eyes between the occiput 

 and posterior orbits 29 



28. Head with postocellar area more densely punctate than sides 



of vertex; median third of lateral lobes of mesonotum more 

 densely punctate than its disk; body black, with labrum, 

 prothorax, median lobe of mesonotum, front legs beyond 

 middle of femora, tegulse, and abdominal segments one to 

 six and sometimes part of seventh, rufous; wings hyaline 



or very slightly infuscated. Length 9 mm similis 



Head with postocellar area and sides of vertex uniformly 

 densely punctate; median third of lateral lobes of mesono- 

 tum not more densely punctate than its disk; body black, 

 with abdominal segments one to five and usually a part of 

 six, rufous; wings hyaline or very slightly infuscated. 

 Length 9 mm aprilis 



29. Vertex adjacent to postocellar area with a small impunctate 



area; postocellar area as densely punctate as the front; 

 median lobe of mesonotum not so densely punctate as lat- 

 eral lobes; body black, with prothorax, tegulae, median 

 lobe of mesonotum except at middle, and abdominal seg- 

 ments one to five, rufous; wings hyaline, veins black, 



stigma rufous below. Length 7 mm. acritus 



Vertex without an impunctate area adjacent to postocellar 

 area 30 



30. Median lobe of mesonotum finely, densely punctate, lateral 



lobes not so closely, but deeply punctate; body dull black, 

 with abdomen wholly rufous; third segment of antennae 

 but little longer than fourth; wings infuscated, veins 

 black, stigma black, paler on hind margin. Length 8 mm. 



abdominalis 

 Median lobe of mesonotum with large, distant punctures, 

 lateral lobes with distant shallow punctures, appearing al- 

 most smooth; scutellum more closely and finely punctate 

 than lobes of mesonotum; front densely, compactly punc- 

 tate, posterior orbits coarsely punctate, not so densely 

 adjacent to the postocellar area as distant from it; postocel- 

 lar area coarsely punctate, more densely than the portion 

 of the posterior orbits adjacent to it; body black, with pro- 

 thorax, tegulae, a spot on each side of median lobe of 

 mesonotum, lateral lobes of mesonotum, upper half of 



