1930 ] 
A New Bee of the Genus Colletes 
221 
piceous. Wings hyaline basally, slightly darkened on the 
apical margin and in the marginal cell, nervures and stigma 
dark brown, second submarginal cell above slightly wider 
than the third. Anterior coxae simple. Tarsal claws red, 
deeply medially toothed. Tibial spurs dark, the anterior 
one finely pectinate. Hind basitarsi three times as long as 
wide (25 x 8). Hind legs with the coxse, trochanters and 
inferior base of the femora whitish-haired, the femora 
above and at apex black-haired, the tibial hairs almost 
all black, especially the long-plumose hairs on the anterior 
face, the basitarsi with pale yellowish hair within but black 
bristles externally, the intermediate legs with mostly pale 
hairs but black-haired on tibiae and basitarsi externally, 
the anterior legs pale-haired and with yellowish hair on the 
tarsi. Abdomen neatly conical, polished, basal tergite im- 
punctate, tergite 2 minutely and indistinctly punctured. 
Apical margins of the tergites (1-5) broadly but feebly 
depressed and covered with a loose, minute pile to form 
broad, pale yellowish fasciae. Basal tergite with very thin, 
erect, white hair, tergites 2 and 3 with a minute, thin, 
black pile, tergites 4-6 with a longer black pile and numer- 
ous long, black bristles. Venter finely, indistinctly punc- 
tured and minutely reticulated, sternite 6 toward apex finely 
rugose and with crescentic, shallow, lateral fossae on each 
side of the median line. 
$ . Length 6-7 mm. Distinctly smaller and more slender 
than the $ . Head sub-triangular, about three-tenths wider 
than long (50 x 65) and the face narrowing about one- 
fourth between the vertex and the lower orbital margins 
(39:20). Sculpture of clypeus, supraclypeus and face as 
in the $ , but pubescence longer and more copious with 
the black hairs below antennal level much more numerous 
and the pale ones tinged with yellowish. Depressed sides 
of the vertex impunctate or very feebly punctured, the 
elevated area very slightly black-haired. Malar space of 
the same length as in the $ but much less wide so that 
it is nearly one-half as long as wide (3x6.5). Antennae 
long, slender, black with the flagellum obscurely brownish 
beneath, joint 3 shorter than 4 or following, the proportion 
of joints 2-5 being 3.5 :5 :6.5 :7.5, the median flagellar joints 
about one and two-fifths as long as wide (7.5 x 5.5) . Meso- 
