BEES OF THE GENUS COLLETES FROM MEXICO 



201 



Genitalia — (Fig. 77.^. Stipes notched, quite rol)ust, except apical part 

 which is long and slender, and covered with long hairs. Central part with 

 tuft of five hairs on inner margin. Sagittal rods long, slender, curved out- 

 ward; wings extending ahout half way down. Volsella quite large and prom- 

 inent. Seventh ventral plate consisting of two long, slender wings, pointed 

 at inner apex ; each with triangular patch of bristle-like hairs near apex. From 

 each wing extends a transparent membrane, about as large as the wing itself, 

 back toward the base. It is possible that this membrane is not always present, 

 but in the specimen I have mounted the membranes are firmly attached near 

 the tips of the two wings. 



Type locality — Moctezuma, Mexico. Described from one male. 



Figure 77. Colletes moctezumensis. 



Colletes luacconiielli n. sp. 



Male — Length 8 mm. Head broader than long; eyes converging below. 

 Face clothed with long, white to faint yellowish, pubescence. Clypeus black, 

 shiny, convex, striate punctate, strife becoming more pronounced toward ape.x ; 

 end truncate, depressed. Supra-clypeal area also striate punctate. Malar space 

 as long as broad. Entire face and vertex thickly punctured ; the punctures on 

 vertex much larger. Hair on vertex sparse, yellowish. Antennae entirely 

 dark brown to black ; scape punctured ; joint three two-thirds as long as 

 four; four and the remainder about the same size; each a little longer than 

 broad. Under part of head clothed with long white hair. 



Thorax — Black, not very shiny ; covered with fluiTy yellowish to brownish 

 pubescence, varying with the individual : hair on sides in front lighter, be- 

 coming darker on mesotborax, and rich brown (in the scutellum, in some speci- 

 mens. Mesotborax with medium sized round jiunctures well separated; thicker 



