NORTH AMERICAN HYMENOPTERA. 253 



pubescence, interrupted at the middle, apical margin black ; the remaining seg- 

 ments fringed with golden pubescence; under side finely punctured, shining, 

 paler than above. Length 6.5 mm. 



Hab. — Mexico. Prof. F. Sumichrast. 



Spha?rophthalma minutissima Blake. 



Female.— Head quadrate, wider than the thorax, posterior angles acute, fuscous, 

 thinly clothed with pale glittering pubescence ; face, scape of antenna? and man- 

 dibles ferruginous; eyes round, prominent; thorax ovate, dark ferruginous, 

 clothed with erect dark hairs, metathorax roundly truncate, sides denticulate : 

 legs fuscous, clothed with pale hairs, intermediate and posterior tibia? armed with 

 spines ; abdomen ovate, basal segment ferruginous, second segment fuscous, hav- 

 ing on the disc a transverse, posteriorly emarginate band of fine glittering pubes- 

 cence ; apical segments clothed with pale pubescence. Length 3 mm. 



Hab. — Mexico. Prof. F. Sumichrast. 



Sphsieroplitlialiiia pygmea Blake. 



Female. — Ferruginous ; head round, wide as thorax, moderately coarsely punc- 

 tured ; antenna? honey yellow, scape clothed with yellowish pubescence ; tips of 

 mandibles blackish ; thorax subovate, narrowed posteriorly, densely punctured, 

 sparsely clothed with erect white hairs ; legs honey yellow, clothed with pubes- 

 cence of the same color; abdomen elongate ovate, closely punctured, thinly 

 clothed with long, erect, whitish hairs ; apical margins of segments above fringed 

 with white pubescence. Length 4.5-7 mm. 



Hab. — Texas, Colorado, Nevada. Four specimens. 



Spluerophthalma virguncula n. sp. 



Female.— Head rounded, not as wide as thorax, ferruginous, covered with 

 coarse, confluent punctures ; antenna? fusco-ferruginous ; eyes round and promi- 

 nent ; thorax robust, ovate, narrowed posteriorly, ferruginous, confluently punc- 

 tured, thinly clothed with short, erect, pale hairs, a small lateral notch behind 

 the mesothorax ; metathorax obliquely truncate ; legs castaneous, thinly clothed 

 with pale hairs, the tarsi somewhat paler; abdomen ovate, black, finely and 

 closely punctured, sparsely clothed with erect white hairs ; apical margins of all 

 the segments fringed with white pubescence. Length 5.5 mm. 



Hab. — New Mexico. 



Sphrerophthaliiia psammadroma Blake. 



Female. — Head black, somewhat wider than the thorax, quadrate, posterior 

 angles acute ; face, scape of antenna? and mandibles ferruginous, tips of the latter 

 black ; eyes large, round, prominent; vertex and posterior margin nearly black, 

 clothed with scattered golden pile ; thorax short, sharply constricted at middle, 

 sides crenulated, ferruginous; legs pale ferruginous, thinly clothed with glitter- 

 ing hairs, intermediate and posterior tibia? armed with spines, calcaria white : 

 abdomen ovate, black, basal segment margined with golden pubescence, second 

 segment with two small fuscous spots at the base and two ovate spots clothed with 

 pale golden pile near the apical margin, which is adorned in the same manner ; 

 apical segments fringed with pale golden pubescence ; under side pale rufous, 

 shining, finely punctured. Length 5.5-6.5 mm. 



Hab. — Mexico. Prof. F. Sumichrast. 



