NORTH AMERICAN HYMENOPTERA. 185 



Metathorax black ; head and prothorax above, scutellum and 

 more or less of metathorax, with fulvous yellow or whitish 

 pubescence. 

 Abdomen above black, second segment with a broad, transverse, median, 

 dull yellowish band, and the fourth, fifth and sixth segments 

 with a dense, dull, yellowish pubescence ; head and thorax 

 above with yellowish fulvous pubescence ; wings fuliginous, 



with a broad, median, subhyaline band iztapa. 



Abdomen above, except extreme base to apex, with a dense, bright scarlet 

 pubescence ; head and thorax above with clay-colored pubes- 

 cence Sumiclirasti. 



Abdomen with silvery pubescence ; second segment ferruginous, gener- 

 ally with narrow, black, apical margin ; three following seg- 

 ments with silvery pubescence, and the two apical segments 

 black, with extreme apex silvery; head and thorax above 



with silvery pubescence apicalata. 



Abdomen black, basal half of second and the third and fourth segments 

 entirely with dense, pale golden, or yellowish white pubes- 

 cence ; head, prothorax and scutellum with pale golden pu- 

 bescence ; wings dusky, with apical third fuliginous. 



azteca. 



Abdomen black, apex of first, base of second, and the third and fourth 



segments with dense, silvery white pubescence ; head, thorax, 



scutellum, pleura and base of metathorax with silvery white 



pubescence; wings hyaline, the anterior pair bifasciate with 



fuscous Wilson i. 



Head and thorax ferruginous, the former larger than usual, quadrate, the 

 vertex very broad behind eyes. 

 Abdomen beyond second segment black, with black pubescence ; first 



and second segments ferruginous peiinsylvauica. 



Abdomen ferruginous, with golden pubescence; apex of first, second 



and the following segments blackish auripilis. 



Eufo-fulvous, the pubescence of the abdomen long and dense. 



Edwardsii. 



jj_ First abdominal segment not nodiform, but gradually dilated towards apex and 



sessile with base of second segment. 



Abdomen black, apical margins of all the segments with a fringe of 



long, dense, golden pubescence ; vertex, pro- and mesothorax. 



and scutellum with golden pubescence ; tegument of prothorax 



ferruginous propinqua. 



Abdomen black, second segment, except apical margin, yellowish ferru- 

 ginous, smooth and polished oceola. 



Abdomen ferruginous, second segment paler, all the segments with an 



apical fringe of black pubescence Sanbornii. 



Abdomen brown, with short golden pubescence ; first segment black ; 

 second, except narrow basal and apical margins, clay-yellow ; 

 head and thorax with short silvery gray pubescence ; meso- 

 thorax black flavida. 



TRANS. AMER. ENT. SOC. XIII. (24) AUGUST, 1886. 



