Specific Characters in the Bee Genus Colletes 21 
the disk. Anterior half of scutellum impunctate, posterior half with large 
punctures. Base of metathorax divided by ridges into quadrate spaces 
which are longer than broad. Lateral faces of posterior truncation irreg- 
ularly and obscurely reticulate, dullish because microscopically lineolate 
or subreticulate. Pleura closely punctured, subcancellate. Thoracic pu- 
bescence short and rather sparse, dull yellowish grey, or, one might say, 
pale greyish ochreous. Tegulae shining piceous, not noticeably punctured. 
Wings hyaline, nervures piceous, stigma fuscous. Legs with mouse-col- 
ored pubescence; tarsi dark; tibial spurs dark brown; hind spur of hind 
tibia pectinate, with about fifteen teeth. Inner tooth of claw short, diverg- 
ing from the outer. Abdomen rather narrow, subconical, moderately 
shiny, punctuation of first segment fine but strong and rather close, of the 
remaining segments minute and obscure. Base of first segment sparsely 
hairy; hind margins of segments 1 to 4 with bands of whitish pubescence; 
second segment very feebly pubescent at extreme base. Venter with rather 
abundant fairly long mouse-gray pubescence.” (Original description). 
{Hair of thorax with some fuscous hairs intermixed on mesothorax and 
scutellum; spurs piceous; mesothorax with a large, shining impunctate 
space.—T. D. A. Cockerell.] 
6. Unknown. 
Type Locatity.—Santa Fé, New Mexico; type in collection 
oi Protessor 1, 13; Ay Cockerell. 
The type was taken at flowers of Chamaesaracha coronopus 
on August 2, and remains unique. The species is certainly very 
close to C. crawfordi, but Professor Cockerell on comparing a 
metatype of crawfordi with the type of chamaesarachae says they 
are not the same and separates them by the characters given in 
the table. It is noteworthy that this third member of the Jatitarsis 
group also visits a solanaceous plant. 
Colletes skinneri Viereck. 
1903. Colletes skinneri Viereck, Transactions of the American Entom- 
ological Society, xxix, pp. 58-59, 2 ¢ (January, 1903) ; original 
description. 
1905. Colletes skinneri Cockerell, Psyche, xii, p. 86, 56 (October, 1905) ; 
in table of species. 
1906. Colletes skinneri Cockerell, Transactions of the American Entom- 
ological Society, xxxii, p. 291; recorded from Beulah, New 
Mexico. 
9. Length 10-11.5 mm. Clypeus flat, shining, its punctures large and 
.elongate, running into conspicuous striae, somewhat depressed medially. 
Supraclypeal area convex, opaque, coarsely punctured, anteriorly distinctly 
/ 63 
