AMERICAN HYMENOPTERA. 125 



wing and the posterior wing hyaline or subhyaline, iridescent; apical 

 two-fifths of the wing strongly dusky; venation dark brown. 



Male. — Length 5 mm. The male differs from the female in having 

 the anterior margin of the clypeus with three obtuse teeth. The man- 

 dibles, scape beneath, spot on trochanters and legs below femora, first 

 abdominal segment beneath rufo-ferrigenous. The striae of the meta- 

 pleuras are oblique. Head much wider than the thorax, but not twice. 



Habitat. — S Florissant, Colorado, June 20, 1908, "on sand" 

 (Roh.); «? Boulder, Colorado, May 26, 190S (Roh.). On 

 warm sand. 



This species is quite distinct from any hitherto described, 

 being easily known by the bronzy-green head and thorax. 



Dedicated to the early Colorado naturalist, Denis Gale, 

 who worked many years among the birds and mammals of 

 Boulder County. 



Miscopliinus nigrescens n. sp. 



Female. — Length 4.25 mm. Middle portion of the clypeus somewhat 

 convex; closely, finely punctured; anterior margin without teeth- 

 Head finely granular; no impressed line from the anterior ocellus 

 Ocelli in a little less than an equilateral triangle. Eyes slightly con- 

 verging towards the top; distance between them at the vertex slightly 

 less than the length of antennal joints 3 and 4. Third antennal joint 

 distinctly longer than the fourth. Prothorax, dorsulum, scutellum 

 and mesopleurae finely granular. Metanotum finely granular and 

 with a few striae; the middle carina distinct. Metapleuras finely 

 striated, at certain angles appearing granular. Posterior face with 

 a triangular fovea near the middle upper margin. Tibiae with a few 

 feeble spines. Venation normal. Abdomen finely tessellate; the 

 venter with the bristles less numerous. Black; mandibles, margin of 

 the second abdominal segment, all the tarsi, a stripe on the posterior 

 part of the posterior tibiae testaceous. Almost no pile on the insect. 

 Basal half of the wings dusky hyaline, the apical half dark fuscous; 

 venation black. 



Habitat.— Rifle, Colorado, July 3, 190S (Roh.). Flying over 

 warm sand among sage brush. 



This species is related to M. californicus Ashm., but the 

 darker legs and scape, the black tegulae will serve to separate 

 it from that species. 



Miscopliinus cyanurus n. sp. 



Female. — Length 5.5 mm. Anterior margin of the clypeus divided 

 into three broad lobes, the lateral lobes narrow; middle lobe slightly 



TRANS. AM. ENT. SOC, XXXV. MARCH, 1909. 



