Patton.) 142 [March 5, 
The following papers were read : — 
Synopsis OF THE NEW ENGLAND SPECIES OF COLLETES. 
By W. H. Patton. 
I. Space between the eye and the mandible of twice the usual 
length. C. valida Cress. 
II. Space between the eye and the mandible less than the width of 
the eye. 
A. ‘Tarsal claws cleft in the 2, venter densely pubescent; (¢ un- 
known). C. aestivalis sp. n. 
B. Tarsal claws of the °, with a sharp tooth beneath, venter not 
densely pubescent. 
a. Labrum with a central rounded elevation, (most distinct in 
the 2); d, space between eye and mandible unusually 
long; 2, ventral valve carinated on each side. . 
C. compacta Cress. 
b. Labrum with a central pit. 
1. Prothorax with a prominent lateral spine. 
C. armata sp. n. (= C. inaequalis Cress., nec Say.) 
2. Angles of the prothorax not prominent. 
Pubescence lemcon-yellow, abdominal fasciae broad; 
wings short, tinged with white. 
C. americana Cress. 
Pubescence griseous, abdominal fescia slender; 
wings of the usual length, hyaline. 
C. scitula sp. n. 
c. Labrum with a distinct depression on each side and two less 
distinct depressions between; space between eye and 
mandible no longer in the ¢ than in the 2; ventral valve 
of the not carinated. 
C. inaequalis Say. (= C. propinqua Cress.) 
Colletes aestivalis sp. n. 
?. Lengthilmm._ Black, the pubescence white, that on the 
inner face of the tarsi tinged with yellow. Tips of the mandibles 
and of the tarsi, rufo-piceous; the tarsal claws cleft, terminating in 
two equal teeth. Space between the eyes and mandibles moderate; 
clypeus confluently punctured, the punctures running into rugae 
towards the tip. Base of the labrum with a distinct median im- 
pressed line and on each side of this a shorter impressed line, and 
some slight impressions visible only in certain lights. Head and 
