l66 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



tennae about as long as the fourth and fifth together. 

 Length 5 mm maxima 



6. Antennae pale; wings hyaline; body black, with clypeus, 



labrum, and mandibles, white; prothorax, legs, venter of 

 abdomen and four basal segments of tergum, luteous; 

 antennas densely hoary, pubescent; saw-guides retracted, 

 teeth of saws rounded; antennae with third segment but 

 little longer than fourth; front not impressed about me- 

 dian ocellus; median fovea wanting. Length 4 mm 



dorsalis 

 Antennae black; wings more or less infuscated; body black, 

 with clypeus, labrum, mandibles, prothorax, legs, venter 

 of abdomen, and four basal tergal segments at middle and 

 sides, yellow or luteous; head hoary with pubescence; 

 saw-guides exserted, convex above and below, and broadly 

 rounded at apex. Length 5 mm maura 



7. Antennae wholly white 8 



Antennae wholly black or fuscous 9 



8. Front with a median furrow; median fovea wanting; body 



black, with clypeus, labrum, mandibles, antennae, tegulae, 

 legs, basal half of venter, and a large triangular spot on 

 middle of dorsum of abdomen at base, white or luteous; 

 head covered with very fine, white pubescence, appearing 

 bare when viewed from before; notum and pleurae with 

 fine pubescence; saw-guides with two sides parallel and 

 obliquely truncated to a point at apex above. Length 



5 mm mellina 



Front without a median furrow; median fovea indicated by 

 a minute pit; body black, with antennae, clypeus, labrum, 

 mandibles, collar narrowly, tegulae, legs, and basal half 

 of abdomen, greenish white or luteous; head and antennae 

 covered with long, black pubescence; pubescence of notum 

 short, sparse, and white; saw-guides broadly convexly 

 rounded at apex. Length 4-5 mm mixta 



9. Pronotum wholly black 10 



Pronotum piceous, margined with luteous; body black, with 



clypeus, labrum, mandibles, pronotum, and dorsum of ab- 

 domen, more or less piceous; tegulae, legs, and venter of 

 abdomen, luteous; head and thorax densely covered with 

 long pubescence; third segment of antennae about as long 

 as fourth and fifth together; saw-guides broadly rounded 



at apex, with a distinct scopa. Length 5 mm mimda 



10. Antennae with third segment considerably longer than fourth 11 



Antennae with third, fourth, and fifth segments subequal; 



body black, with clypeus, labrum, mandibles, tegulae, legs, 



and disk of abdomen at base, luteous; head and thorax 



covered with fine, white pubescence; cell R* about as 



