THE CANADIAN ENTOMOLOGIST 273 



narrow ochreous hair bands, interrupted on second ; apical plate 

 (eighth ventral) broadly truncate. 



Hab.—Yernon, British Columbia, June 9, 1902 (Afiss 

 Ricardo); British Museum. Allied to A. trevoris Ckll., but dis- 

 tinct by the colour of the antennae and pubescence; possibly, how- 

 ever, a subspecies. 



At Shorts Point, Okanagan Lake, B. C, June 28, 1902, Miss 

 Ricardo took A. medionitens Ckll., a form with the abdominal 

 hair bands clear white. 



Nomada vicinalis aldrichi Ckll. 

 Male.— Vernon, B. C, May 15, 1902 {Miss Ricardo), Brit. 

 Museum. New to British America. 



Nomada illinoensis Rob. 

 Male. — Boston, Mass., Brit. Museum. 



Nomada custeriana Ckll. 

 ilfa/e.— West Cliff, Colo., May 19, 1889, {Cockerell), Brit. 

 Museum. The specimen still carries my number 9, which shows 

 that it is one of two specimens captured; the other, determined 

 by Ashmead as N. parata, is in the U. S. National Museum, and 

 is the type of N. custeriana. The species has not been collected 

 since. 



Nomada vernonensis sp. n. 



cf . — Length about 9 mm; robust, the head and thorax dull 

 and rough (the face somewhat glistening), with erect dull white 

 hair; head broad, vertex elevated, eyes pale grey; head and thorax 

 black (with no red), the thorax with tubercles yellow, but no other 

 light markings; mandibles (except rufous ends, which are simple), 

 labrum (which has an apical patch of hair, but no tooth), band 

 on lower margin of clypeus (narrowest in middle), and narrow 

 lateral facemarks (shaped like the head and slender neck of a bird, 

 upside down, ending narrowly but abruptly about level of antenna) , 

 all bright yellow; posterior orbits wholly black; antennae long, 

 robust, not denticulate, third joint conspicuously shorter than 

 fourth, but much more than half its length; scape black and red, 

 hardly swollen; flagellum bright ferruginous, the basal half heavily 



