390 THE CANADIAN ENTOMOLOGIST. 



coloradella has it black. In the type oUiesperel/a, however, it is not a pure 

 white, but has a pale golden tint ; while in coloradella it is variably pallid or 

 pale orange at the base and sides. The differences described in the vena- 

 tion between coloradella and hesperella also seem inconstant. I think, 

 therefore, that all three constitute a single species, remarkable for the 

 colour-variation in the ventral scopa. 



Anihophorula hrimeri (Crawford). 

 On Aug. 3, 1911,1 found both sexes common at flowers of Belianthus 

 lenticularis at Sterling, Colorado. The species is new to Colorado. The 

 other bees taken at Sterling on the same day, all from the Helianthus, are 

 Melissodes obliqua Say, 9 ; M. aurigenia Cress., A^ ; Andreiia helianthi 

 Rob., 9 ; Perdita albipennis Cress., 9 : Augochlora coloradensis Titus, 

 9 ; Halictus armaticeps Cress., 9 ; H. pru'mosiformis Crawf. 9. 



Neopasites robertsoni Crawford. 

 Prof. O. A. Stevens sends me many specimens, collected on flowers 

 of Grindelia squarrosa at Agricultural College, North Dakota, Aug. 18 

 and 19. At the same time, and on the same flowers, he collected many 

 Andrena hirtichicta Pro v., both sexes. The 1 itter he has also taken at 

 Meliotus alba. The ]\'eopasites has hitherto been known only from 

 Nebraska. 



Ceratina dupla halophila, n. subsp. 



9 . — Length, about seven mm.; dark bkie-green, with the usual white 

 mark on clypeus. Differs from the usual form by the strongly infuscated 

 wings and dark tarsi; the tegulae are shining black. C submariiiina Ckll. 

 rarely has a small spot on the clypeus of the female, and then, because of 

 the similarly dark wings, rather resembles the present insect; but in C. 

 submaritima the tubercles are wholly dark, and the face is much less 

 densely punctured. 



Hab. — Woods Hole, Mass., June {Cockerellj. 



Other bees taken this year at Woods Hole are the following (those 

 marked with an asterisk collected by Miss Eleth Cattell) : Sphecodes 

 arvefisis Patton ; .S". persiniilis Lovell & Ckll. (botli species of Sphecodes at 

 umbelliferous flowers) ; Agapostemon radiatus Say ; A. viridulus Fab.; 

 Nomada articulata Smith ; Augochlora coufusa Rob.;"^" Xenoglossa 

 pruinosa Say ;* Bonibus fervidiis Fabr.;* B. terricola Kirby ;* B. vagans 

 Smith;* Megachile campanulce Rob.* (male, remarkable for the extremely 



