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



Third cubital cell broader above than below; third joint of 

 antennae nearly as long as fourth, fifth, and sixth to- 

 gether; pubescence of thorax and base of abdomen more 

 or less ochraceous; pubescence elsewhere black or black- 

 ish; second joint of maxillary palpi twice as long as first 4 



4. Dorsum of thorax with some black hair; at least first and 



second dorsal abdominal segments with pale pubescence S 

 Dorsum of thorax without or with little black hair; usually 

 only first dorsal abdominal segment with pale hair; first 

 joint of labial palpi nearly four times as long as second; 

 length 12-15 mm abrupta 



5. Dorsum of thorax with black hair in center; length 12-15 mm, 



bomboides 

 Dorsum of thorax with black hair forming a transverse band; 

 length 12-15 mm bomboides canadensis 



Males. 



1. Claw joints of mid legs simple; clypeus entirely yellow or 



nearly so 2 



Claw joints of mid legs ciliate; face marks, and scape in 

 front, whitish; clypeus partly black; pygidium rather dis- 

 tinct, the area indistinct; third antennal joint longer than 

 fourth, fifth, and sixth together; mandibles and abdomen 

 black; pubescence of head and thorax and first dorsal 

 abdominal segment long and griseous or ochraceous, 

 mixed with black on vertex and mesonotum; mid tarsi 

 fimbriate; length 15-16 mm ursina 



2. Hind metatarsi with a large tooth; apex of labrum con- 



cave, tufted with black hairs; third antennal joint about 

 as long as fourth and fifth together; spot on mandibles 

 and scape in front yellow; seventh dorsal abdominal 

 segment without a pygidial area; apex concave, bidentate; 

 pubescence of head, thorax, fore legs, and base of abdo- 

 men mostly ochraceous; elsewhere mostly black; length 



12-14 mm 3 



Hind metatarsi simple; labrum entire 4 



3. Only first dorsal abdominal segment with pale pubescence 



abrupta 

 First and second dorsal abdominal segments with pale pubes- 

 cence; dorsulum without or with few black hairs, .bomboides 



4. Third antennal joint longer than fourth and fifth combined; 



seventh dorsal abdominal segments furcate; labrum yel- 

 low; mandibles and scape usually black; pubescence 

 griseous, mixed with black above; length lo-ii mm... 



terminalis 

 Third antennal joint longer than fourth; pygidial area 

 shining; labrum, mandibles, and scape black; dorsum of 



