NORTH AMERICAN HYMENOPTERA. 229 



Sphserophthalma bexar Blake. 



Male. — Black ; head rounded, not as wide as the thorax, closely punctured, 

 thinly clothed with erect black hairs ; antennae black, as long as the head and 

 thorax ; eyes round, prominent ; thorax subquadrate, slightly narrowed poste- 

 riorly, prothorax closely covered with confluent punctures, those on the meso- 

 thorax finer ; metathorax roundly truncate, coarsely reticulated, dorsal groove 

 not extending to the middle ; wings ample, fuliginous, slightly paler about the 

 middle, marginal cell elongate subquadrate, abruptly truncate at tip, first sub- 

 marginal nearly as large as the marginal, second receiving the first recurrent 

 nervure a little before the middle, third pentagonal, its extreme nervure extend- 

 ing beyond the marginal ; tegulse ovate, punctured ; legs black, clothed with 

 black hairs ; abdomen subpetiolate, first segment black, closely punctured, second 

 bright ferruginous, finely punctured, thinly clothed with reddish pubescence; 

 remaining segments blackish, punctured, clothed with black pubescence ; under 

 side of second segment bearing a short longitudinal carina towards the apical 

 margin, ventral segments same as above. Length 9-12 mm. ; expanse of wings 

 15-21 mm. 



Hab. — Texas. 



Sphserophthalma waco Blake. 



Female. — Dark fuscous ; head quadrate, posterior angles rounded, not quite as 

 wide as the thorax, closely reticulated, clothed with erect black hairs ; scape of 

 antenna? black, flagellum piceous ; mandibles black ; eyes round, polished ; thorax 

 short, subquadrate, closely reticulated, metathorax abruptly truncate ; legs black, 

 clothed with fuscous hairs, intermediate and posterior tibia? armed with spines ; 

 abdomen : basal segment subsessile with the second, closely punctured, clothed 

 with black hairs ; second segment bright ferruginous ; finely reticulated, clothed 

 with scattered ferruginous pubescence and a few black hairs at base ; apical seg- 

 ments dark fuscous, fringed with dark ferruginous pubescence ; under side chest- 

 nut brown, coarsely punctured, clothed with scattered, pale, glittering hairs. 

 Length 11 mm. 



Hab. — Texas. 



Taken on sandy roads. 



Spha^rophthalma aclmetus Blake. 



Male. — Head and thorax black ; the former round, not as wide as the thorax, 

 coarsely punctured, thinly clothed with erect hairs; antennas black ; eyes round, 

 prominent ; thorax ovate, narrowed posteriorly, coarsely punctured, metathorax 

 roundly truncate, deeply reticulate ; wings fuliginous, marginal cell short, 

 roundly truncate at tip, second submarginal subtriangular, its basal nervure 

 sinuate, receiving the first recurrent nervure before the middle, third submarginal 

 indistinctly defined ; legs black, thinly clothed with black hairs ; abdomen ovate, 

 petiolate, basal segment black, coarsely punctured, second and following segments 

 dark ferruginous, closely punctured, thinly clothed with erect black hairs, mar- 

 gins of the segments fringed with black pubescence. Length 13 mm. ; expanse 

 of wings 18 mm. 



Hab. — Texas. 



This may be the male of 8. waco. 



