1896.] NATURAL SCIENCES OF PHILADELPHIA. 67 



notched on inner side near end, but not actually bifid. Cheeks quite 

 densely hairy. Antennie dark brown, almost black above. 



Tubercles, and hind border of prothorax more or less, very pale 

 yellowish. Mesothorax bulging in front, not very shiny, dark brassy, 

 hardly green, quite pubescent with erect whitish hairs. Sides of 

 metathorax with tufts of hairs, but i^ostscutellum not conspicuously 

 hairy. 



Teguke hyaline. Wings hyaline, nervures very pale yellowish, 

 almost colorless, stigma margined with brown. Marginal cell rather 

 long, poststigmatal portion distinctly longer than substigmatal. First 

 submarginal not nearly so large as first discoidal. Second sub- 

 marginal large, narrowing hardly one-half to marginal. Third dis- 

 coidal quite distinct. 



Legs black ; anterior knees, anterior tibiae in front, middle tibise 

 at tip behind, dull yellow. Abdomen rather narrow, black ; second, 

 third and fourth segments at base with a broad pale yellowish band, 

 slightly notched in middle behind. Venter dark brown. The 

 abdominal bands have a slightly greenish tint, so that when the 

 insect is alive on the flowers it rather suggests a miniature Nomia 

 similar to N. punctata. 



$. — Length 6 mm. Cheeks unarmed. Light markings all deep 

 saffron-yellow, instead of pale greenish-yellow. Mandibles simple, 

 yellow with ferruginous tips. Face beneath antennae all yellow, 

 except two black dots on clypeus, the yellow moreover extending 

 upward at sides of face, coming to a point at an angle of about 50°, 

 not quite so far up as the length of the scape above level of insertion 

 of autenme. Antenna yellow; funicle, flagellum and end of scape 

 above, dark brown. 



Yellow hind margin of prothorax connecting with yellow tuber- 

 cles. Legs yellow; part of middle coxae, posterior coxae except ends 

 and a spot behind, a large patch on anterior and middle femora 

 behind, a patch on both sides of hind femora, a large patch on 

 middle tibiae, and outer side of hind tibiae and tarsi, black. Pleura 

 with a round yellow patch, not very conspicuous, in front. 



Abdomen above shining, dark brown, with rather broad yellow 

 bands at proximal margins of segments 2-5, that on 4 narrowest, 

 that on /) broadest, and notched behind medially. Sixth segment 

 dull rufous with a brown rather suffused band. Venter dull orange. 



Hah. — Las Cruces, N. M., common at flowers of Sphceralcea an- 

 gustijolia, middle of August to middle of September, 1895. 



