No. 22.] HYMENOPTERA OF CONNECTICUT. 335 



u. Abdomen not entirely stramineous above 12 



Abdomen entirely stramineous above; antennas not annulated 



pallescens 



12. Abdomen above more or less red or brownish stramineous, 



black or blackish at apex 14 



Abdomen above not colored as in species described in preced- 

 ing paragraph 13 



13. All of first dorsal abdominal segments black; dorsal seg- 



ments beyond fifth very dark brown; coxae in color nearly 

 as in tumidiformis, basal half of hind pair mostly dusky; 

 scape and pedicel brownish stramineous; areolet open. 



Length 6-7 mm nortoni 



Most of first dorsal abdominal segment black; dorsal seg- 

 ments beyond fourth very dark brown; coxae brown of 

 various shades, mid and hind pairs partly dusky; body 

 about as long as in nortoni tumidiformis 



14. Face mostly black, and with white orbital lines that are 



more or less dilated at clypeus IS 



Face black or mostly so, not maculated 16 



15. All coxae black, trochanters reddish; margin of apical dorsal 



segment not partly whitish. Length 7 mm orbitalis 



Coxae black, except for a yellowish tip to fore pair; fore and 

 mid trochanters mostly yellowish; hind trochanters with 

 proximal one mostly blackish, distal one mostly reddish. 

 Length 6 mm orbitaliformis 



16. Abdomen with each dorsal segment partly black 17 



Abdomen reddish above, or with at least several segments 



entirely red, or red with dark stains 18 



17. Abdomen above mostly black; second, third, and fourth dor- 



sal segments with a complete brownish border; fifth and 

 following segments more or less distinctly brown, at least 

 along apical margin; coxae and trochanters mostly black 

 or blackish, rest of legs mostly reddish, clypeus and mandi- 

 bles mostly yellow. Length 5.5 mm teeniatus 



Abdomen with apical margin on second dorsal segment and 

 most of third and fourth segments brownish stramineous; 

 fore and mid legs including coxae almost entirely brown- 

 ish stramineous; hind coxae black, rest of hind legs red- 

 dish, except their trochanters, which are more or less 



fuscous; antennae black throughout. Length 4 mm 



melanocerus 



18. Fore coxae yellow beneath, mid coxae with a yellow tip, hind 



coxae reddish, all trochanters mostly yellow. Length 5-6 



mm brittoni 



All coxae mostly stramineous, same as trochanters in color; 

 most of fore and mid legs stramineous; hind legs beyond 

 trochanters partly or mostly dusky; antennae mostly brown 



