346 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Hind coxae, femora and tibiae marked or banded with white; 

 abdomen, at least above, steel-blue. Length i6 mm. ..pulcher 



21. Propodeum black 22 



Propodeum brownish red. Length 17.5 mm centrator 



22. Hind coxae beneath with a velvety area; apex of abdomen 



spotless 23 



Hind coxae beneath without a velvety area; apex of abdomen 

 spotless; scutel pale 24 



23. Scutel mostly black; white only at its sides. Length lo-ii 



mm navus 



Scutel mostly white; nearly all of under surface of hind coxae 

 velvety; hind tibiae with a white line behind near their 

 base. Length 1 1-14 mm sagus 



24. Propodeum with a white spot on each side. Length 12.5-16 



mm otiosus 



Propodeum immaculate; body as long as in otiosus 



imifasciatorius 



25. Abdomen above mostly black, but marked with white or yel- 



low spots or bands, and sometimes varied with reddish 



maculations 26 



Abdomen above not answering description in preceding para- 

 graph 28 



26. 'Species not answering description in following parapraph.. 27 

 Dorsum of abdomen with second and often third segment 



with an apical yellowish band, apical and adjoining seg- 

 ments reddish; mesothorax and generally propodeum also 

 reddish, femora black. Length 14 mm subdolus 



27. Dorsum of abdomen with second segment fulvous, and with 



a whitish band at apex of third, fourth and sixth seg- 

 ments; legs fulvous or reddish. Length 11-14 mm, . . jucundus 

 Dorsum of abdomen with second segment fulvous and all its 

 segments with an apical yellow band; face black; hind 

 coxae beneath not at all velvety. Length 12.5- 14 mm. atrifrons 



28. Abdomen above mostly reddish, with its apex, however, 



black; hind coxae beneath not at all velvety; scutel whit- 

 ish or reddish 29 



Abdomen above mostly reddish or fulvous, first segment and 

 base or apex of second and sometimes third and fourth 

 segments, more or less black 35 



29. Joints of basal portion of flagel elongate, oblong in profile.. 30 

 Joints of basal portion of flagel not elongate, subquadrate 



in profile; abdomen above with first, second, third, and 

 sometimes fourth segments entirely reddish; hind femora 

 and tibiae marked with black; apex of abdomen, at least 

 above, black. Length 7.5 mm hospitus 



