BEES OF THE GENUS COLLETES FROiM MEXICO 205 



inner margin convex. Clypeus large, broad, shining, convex, with sparse 

 golden hair, and large, shallow, confluent punctures forming irregular striae ; 

 median sulcus narrow, deep ; apex depressed, subemarginate. Mandibles large, 

 blunt, entirely black, with few golden hairs. Supra-clypeal area with a rectan- 

 gular median space smooth, remainder with dense large punctures, smaller 

 basally. Space along eye margins and around antennae with dense, long, 

 dark ochraceous hair. Vertex almost nude. Face densely punctured ; punc- 

 tures becoming larger and confluent near vertex. Along the inner margin 

 of each eye, from the vertex half way down the face is a space that is de- 

 pressed very much, is dull black, and almost entirely lacking punctures. A 

 narrow space across vertex and along lateral margins of outer ocelli, is smooth 

 and shining ; behind this the punctures become dense, and of two sizes. 

 Occiput with fringe of rather long ferruginous hair. Malar space short, one- 

 eighth to one-sixth as long as broad. Antennae short; scape long, smooth, 

 with a few golden hairs at apex ; flagellum brown beneath ; joint three one and 

 one-half times as long as four ; four shorter than five ; all but third and last 

 shorter than broad. Under side of head with sparse long ochraceous hair. 



Thorax — Densely covered with short ferruginous pubescence, becoming 

 long and pale on sides, metathorax, and scutellum ; mesothorax black, rather 

 shiny, densely punctured with large round punctures, crowded over entire sur- 

 face, except a small impunctate disk. Scutellum shining, densely punctured, 

 except anterior margin, with large punctures ; hair on sides long, light ; inside 

 of this, hair is dark, rich brown. Postscutellum rugulose. Superior face of 

 metathorax with pits not clearly defined, having a wavy appearance. Enclos- 

 ure of posterior face shining with wavy irregular surface like that of superior 

 face, funnel shape, neck narrow ; lateral faces bordering enclosure roughened 

 with minute wavy lines, giving peculiar appearance like microscopic pits over 

 entire surface. IMesopleura with large punctures ; hair long and plumose, 

 almost white. Wings darkened almost to ferruginous ; nervures and stigma 

 ferruginous ; tegulae ferruginous. Prothoracic spine short and sharp. 



Abdomen — Densely punctured and microscopically wrinkled ; punctures 

 dense on basal and apical margins of segments. First segment is not truncate, 

 but tapers off at base ; punctures dense except on tapering part. The punc- 

 tures are more dense and smaller near both margins of the segments. The 

 apical fasciae of segments one to five are rather broad ; the pubescence is pure 

 white, quite short and down-like ; often broken on the first two segments. The 

 last three segments have many black, spine-like hairs, becoming dense and of 

 a brownish color on the last segment. On the dorsal surface the hairs are 

 sparse, long, and golden. 



Legs — Stout, black ; pubescence entirely ochraceous to ferruginous, or 

 golden ; floccus on the posterior femora long, dense, plumose, ochraceous ; 

 hair on posterior tibiae almost spine-like. Tibiae stout, broad at apex ; spurs 

 golden. First joint of the hind tarsi rectangular, broad, being one-third as 

 broad as long. Pubescence of tarsi golden, spine-like. Claws sharp, medially 

 toothed. 



