NORTH AMERICAN HYMENOPTERA. 183 



Genus 3, SPHJGROPHTHALMA Blake. 



MALES. 



Eyes circular, convex, polished. 



X First abdominal segment small, nodiform, more or less constricted at apex. 



/ Head and thorax black, with black pubescence, 

 a First and second abdominal segments black, remainder with long dense ful- 

 vous pubescence. 



Large; length 21mm orcus. 



Small; length 8.5mm zelaya. 



jbfe. Second abdominal segment reddish brown with a broad orange band on 



posterior half, slightly interrupted medially; first segment 



black with a reddish brown band remainder black..castor. 



a Second abdominal segment ferruginous ; apical segments darker and fringed 



with blackish pubescence maeer. 



cv Head larger than usual, quadrate ; vertex very broad behind the eyes ; mar- 

 ginal cell lanceolate, pointed at apex sca^va. 



- Head small and of the usual form. 



i Second abdominal segment bright orange ferruginous above and beneath, 

 with short coccineous pubescence ; apical margin fringed with 

 black pubescence ; first segment flattened ; marginal cell short, 



broadly truncate at tip bexar. 



Head and thorax black, second and following segments of abdomen dark 

 ferruginous ; apical margins fringed with black hairs. 



ad met us. 

 Second abdominal segment ferruginous above and beneath, generally paler 

 on posterior half, sometimes forming two large yellow spots, 

 with golden pubescence, except at extreme base and apex 

 where it is black ; first segment nodose ; marginal cell trun- 

 cate at tip fenestra fa. 



Head, thorax, petiole and second abdominal segment ferruginous; third, 



fourth and fifth segments black, apex silvery creon. 



Second abdominal segment above yellow, with long, dense, yellow pubes- 

 cence, beneath black ; remainder of abdomen above with long 

 black pubescence ; first segment nodose ; marginal cell trun- 

 cate at tip macra. 



Second abdominal segment above ferruginous, with black pubescence, fus- 

 cous at base and apex and slightly so medially; beneath 

 black ; first segment nodose ; marginal cell broadly rounded 



at apex canella. 



Head and thorax black, sparsely mixed with glittering pubescence. 



Second segment of abdomen ferruginous, with black pubescence, beneath 



with a broad, longitudinal, black band ; wings fuscous, mar 



ginal cell broad and broadly rounded at apex...niacilenta. 



Abdomen, except first segment, ferruginous, with black pubescence, 



dense on apical margin of segments ; apical segment with pale 



golden pubescence obscura. 



Head with black hairs, except a tuft of reddish golden pubescence on the 

 vertex; wings blackish, with a violet reflection vestita. 



