Specific Characters in the Bee Genus Colletes 55 
ened, dullish surface. Scutellum with similar though more elongate punc- 
tures on a distinctly subparallel striate surface, the basal impunctation very 
narrow. Postscutellum roughened; and with long, erect, gray pubescence. 
Superior face of metathorax defined by a sharp angulation and divided. 
into about a dozen shining pits, square medially but irregular and longer 
than wide laterally. Enclosure funnel-shaped, very polished and shiny, 
ridged laterally at base and with the neck short and wide, remainder of 
posterior plate shiny, coarsely reticulated, the lateral faces of metathorax 
-dullish, minutely tasselate, and with numerous irregularly curved ridges. 
Mesopleura crowded with coarse punctures. Tegulae rufo-piceous to black. 
Wings hyaline to well darkened, nervures brownish to deep black, stigma 
very dark brown to black. Legs black with grayish white pubescence, dense 
on posterior femora and tibiae, the inner tarsal apices with orange tufts. 
Posterior metatarsi three and two-thirds times as long as broad, middle 
joints two and one-half times as long as broad. Anterior coxae with long, 
blunt, hairy spines. Hind tibial spur pectinate with about twenty-five teeth, 
the inner one very minutely pectinate. Claws unusually long, deeply medi- 
ally cleft. Abdomen suboval, shining, the first segment with fine but well- 
separated punctures, more indistinct and widely separated basally, and 
sometimes forming a median impunctate line, apically very fine and dense; . 
the enclosed basal portion polished and subimpunctate, and defined by an 
angulation and a ruff of long, erect, whitish hairs which extend part way 
down the sides. Segment 2 and following ones more finely and closely 
punctured, practically bare. Apical margins of segments 1 and 2 depressed, 
the first one with traces of a fascia laterally, which joins with a complete 
fascia on base of 2, which with 3-5 has an unbroken fascia on its apical 
margin. These fasciae are narrow and loose but pure white and strongly 
contrasting, and are narrowly continued on venter. 
3o. Length 8-10 mm. Differs from the 2? as follows: More slender, and 
with the whole pubescence longer and denser, that on thorax above pale 
ochraceous to dull gray, usually with some shorter very dark brown to 
black hairs intermixed, mostly on disk and scutellum; face with dense hair, 
concealing the clypeus, yell6wish white, pale on vertex where a very few 
scattered dark hairs are usually present laterally; malar space distinct, 
about one-fourth as long as broad; antennae long, joint 3 shorter than 4, 
which is shorter than 5 or following, the proportion being 4:5:6; middle 
flagellar joints one and one-half times as long as broad; prothoracic spine 
variable, generally short and inconspicuous; punctures of mesothorax 
coarse, round and deep, separated though close laterally, and becoming 
scattered on the disk; mesopleura with close but quite separate punctures; 
scutellum very coarsely and closely punctured posteriorly, median meta- 
thoracic pits more regular; wings clear, nervures and stigma black to pale 
reddish brown; claws deeply apically cleft, the tibial spurs but indistinctly 
pectinate; abdomen slender and elongate, closely and coarsely punctured 
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