No. 22.] HYMENOPTERA OF CONNECTICUT. 743 



Cheeks unarmed; clypeus bisinuate, with a median angle and 

 two teeth on each side; mandibles with four teeth sayi 



3. Mandibles with five teeth; scopa yellow 4 



Mandibles with four teeth 8 



4. Ventral scopa yellowish; head, thorax, and abdomen with 



yellowish pubescence, except for some black hairs on 



dorsum 5 



Ventral scopa black and bright golden brownish; head and 

 thorax with white pubescence; first and second dorsal ab- 

 dominal segments with yellowish white pubescence, suc- 

 ceeding segments with black pubescence melanophea 



5. Apical dorsal abdominal segment without black pubescence.. 6 

 Apical dorsal abdominal segment with black pubescence .... 7 



6. Apical dorsal abdominal segment with its pubescence all 



yellow latimana 



Apical dorsal abdominal segment with appressed golden 

 brown pubescence and some basal non-appressed black 

 hairs, length 10 mm exclamans 



7. Length 12 to 15 mm vidua 



Length 1 1 mm. . . , infragilis 



8. Ventral scopa yellowish or white; posterior ocellus not 



nearer to edge of vertex than to nearest eye margin; disc 

 of sixth dorsal abdominal segment with erect hairs that 

 are more appressed and dense apically; hair of apical 

 dorsal abdominal segment black at base, whitish apically, 

 that segment concave in profile before apical lip; clypeus 



entire 9 



Ventral scopa yellow; disc of apical dorsal abdominal seg- 

 ment straight in profile; hind metatarsi narrower than hind 

 tibiae mendica 



9. Sixth dorsal abdominal segment finely and closely punctate; 



pale pubescence white; hair of apical ventral segment 



black generosa 



Sixth dorsal abdominal segment densely and coarsely punc- 

 tate; pale pubescence griseous; hair of apical ventral seg- 

 ment usually whitish brevis 



Males. 

 Mandibles with a large tooth beneath. 



1. Fore tarsi flattened; coxal spines distinct; apical joint of 



antennae broad and flat; fore tarsi colored 2 



Fore tarsi simple, not flattened, black or nearly so 6 



2. Fore coxae with one or more bristles in front; first joint of 



front tarsi with a boat-shaped scale; lower angle of cheeks 

 grooved and with a distinct posterior spine; sixth dorsal 

 abdominal segment with an ordinary carina; its apical 



