204 E. T. CRESSON. 



fuscous, marginal cell long, sublanceolate, obtusely pointed at tip, second sub- 

 marginal nearly as long as the first, truncate at tip and narrowed one-half 

 towards marginal, receiving the first recurrent at the base and the second 

 one-third from the tip; legs slender, simple, tarsi fuscous; abdomen elongate 

 convex, rapidly narrowed to tip, segments 1 — -5 each with an apical fringe of 

 Bhort dense white pubescence, terminal segment flat, produced, broadly rounded 

 at tip; venter subconvex, ornamented as above. Length .35 inch. 

 Hah. — Nevada, (Morrison). One specimen. 



Jflelecta pacifica Cress. — J variety fulvida. — Black, the pubescence on 

 scape above and a tuft on vertex, yellow; the occiput, thorax above and band 

 on first segment of abdomen above, clothed with a dense rich fulvo-ferrugi- 

 nous pubescence; abdomen with a slight bluish iridescence in certain lights. 

 Length .50 inch. 



Hab. — Nevada, (Morrison). Six specimens. A very handsome 

 insect. 



Melecfa separata. — 9. — Deep black, clothed with black pubescence; 

 tuft about base of antennae, occiput, thorax above, except black band between 

 the wings, and a band on first segment of abdomen above, clothed with a pale 

 ochraceous pubescence; wings slightly dusky; abdomen with a slight bluish 

 iridescence. Length .50 inch. 



Hah. — Nevada, (Morrison). One specimen. Resembles pacifica., 

 but is rather more robust, and readily distinguished by the black 

 band between the wings. 



Melecta mactilata. — 9- — Small, black; head above antennae, cheeks, 

 spots on thorax above, large patch on sides of pleura, apical middle of scutellum 

 and sides of metathorax, clothed with a short dense cinereous pubescence, that 

 on head above and mesothorax anteriorly often varied with spots of black or 

 brown pubescence ; flagellum robust ; disk of mesothorax and of the scutellum, 

 which is bilobate, nude and confluently punctured; thorax broad, gibbous; 

 tegulae dull fulvous; wings with the apical margin broadly dusky, streaked 

 with hyaline, the marginal cell and a cuneiform spot across the second and 

 third submarginal cells fuliginous; legs black, with long sparse hairs, the 

 tibise more or less clothed with a dense cinereous pubescence; abdomen broad 

 ovate, depressed, opaque; a broad band of short dense appressed cinereous 

 pubescence on segments 1 — 4, that on the first straight on anterior margin and 

 sinuate posteriorly, those on three following segments more or less narrowed 

 and sinuate on anterior margin and each enclosing on the posterior margin 

 four black spots; fifth segment with two large cinereous spots; venter piceous, 

 shining. Length .35 inch. 



%. — Like the 9 in ornamentation; the flagellum very much thickened and 

 fusiform. Length .30 inch. 



Hah. — Nevada, (Morrison). Four specimens. The arrangement 

 of the patches of pubescence on this curious little species is extremely 

 difficult to describe. The form of the flagellum of the % is unlike 

 that of any other species of Apidae known to me, being dilated and 

 fusiform. 



