AS ee x4 “AS bel ly ad 
Specific Characters in the Bee Genus Colletes 13 
dially but crowded along the edges. Metathorax with a well-defined su- 
perior face which bears well-formed shining pits, square medially, the 
enclosure funnel-shaped, polished, and smooth, the surrounding space only 
slightly shiny because of a minutely punctured and irregularly reticulated 
surface, the lateral faces dullish and minutely punctured. Mesopleura 
with coarse and close but separate punctures. Pubescence of thorax above 
- short, erect, grayish, largely mixed with black especially on scutellar fringe, 
postscutellum and metathorax with long, whitish hairs, short and white © 
on pleura. Tegulae shining blackish. Wings hyaline, nervures blackish, 
stigma dark brown. Legs wholly black, their pubescence wholly white 
except for the usual reddish tarsal tufts. Anterior coxae without spines. 
Tibial spurs light brownish, the outer ones on hind tibiae finely pectinate. 
Claws rufous and deeply medially toothed. Basal joint of hind tarsi three 
and one-half times as long as broad, middle joints one and three-fourths 
times as long as broad. Abdomen subconical, stoutish, first segment 
strongly and closely punctured, more finely and closely so toward the 
apical margin which is depressed and reflexed, as are also both the basal 
and apical margins of segment 2 which is punctured similarly to the first 
but more finely so, segment 3 basally depressed with the punctures widely 
separated, this changing to a close arrangement apically, following seg- 
ments very finely punctured. Segments 1-5 have narrow white fasciae on 
the apical margins, continued as ventral fringes, and on the disks short, 
pale hairs, the apex with some brownish hairs near tip. 
6. Length 8-9 mm. Differs from the @ as follows: Clypeus densely 
bearded with short, appressed, white pubescence, that on thorax above 
with fewer’ dark hairs, sometimes only a few inconspicuous fuscous ones, 
pleura with long@r pubescence, anterior femora bearded; antennae with 
scape short, almost concealed by the facial hair, joint 3 longer than 4 or 5 
but shorter than 4+5, the proportion being 5:3:4, the middle flagellar 
joints as long as wide; malar space a mere line; pits of superior meta- 
thoracic face longer than broad, even medially, the enclosure ridged baso- 
laterally; nervures rather paler, apical tarsal joints sometimes brownish; 
abdominal depressions and reflexions more decided, very narrow fasciae 
on segments 1-6, the disks with a decidedly longer and denser pubescence; 
basal joint of hind tarsi slightly less than three times as long as broad, 
middle joints one and one-fourth times as long as broad. 
Genitalia.—Stipes notched, its apex very small, claw-like; sagittal rods 
parallel throughout, medially expanded into a large subtriangular external 
tooth, apically broadly truncate; volsella very large, over one-half as long 
as sagitta; seventh ventral plate small, the apical one-third membranous 
and subglabrous, medially with a transverse area of short stiff spines run- 
ning toward an external projecting lobe, basally chitinized and smooth. 
(Plate 1, figures 1 and 1a.) 
