272 THE CANADIAN ENTOMOLOGIST. 



Halictus craterus Lovell. 

 Nerepis, July 18, Aug. 18, 19, three females; Aug. 19, one male. 

 St. John, July 14, Sept. 8, 15, 18; Oct. 3, six females; Sept. 8, 

 9, 18, Oct. 2, 3, ten males. 



Halictus cressoni Robertson. 

 St. John, Sept. 9, Oct. 3, two females; Sept. 9, one male. 

 Nerepis, July 18, one female. 



Halictus lerouxii Lepelletier. 

 St. John, Sept. 8, Oct. 3, two males. 

 Nerepis, Aug. 18, one male 



Halictus oblongiis Lovell. 

 St. John, July 18, Sept. 8, 15, Oct. 3, six females. 

 Nerepis, July 22, Aug. 19, two females. 



Halictus pilosus leucocomus Lovell. 

 St. John, Sept. 8, one female. 

 Nerepis, July 22, Aug. 19, two females; Aug. 18, three males. 



Halictus provancheri Dalla Torre. 

 St. John, Sept. 8, 9, nineteen females; Sept. 8, 9, five males. 

 Nerepis, July 18, Aug. 18, three females; July 22, Aug. 18, 20, 

 22, ten males. 



Halictus versans Lovell. 

 St. John, July 14, 18, seven females. 

 Nerepis, Aug. 19, one female. 



Andrena canadensis Dalla Torre. 

 Nerepis, Sept. 8, 9, two females. Det. by Mr. Viereck. 



Andrena cratcegi Robertson. 

 Nerepis, July 22, 24, three females. Det. by Mr. Viereck. 



Prosopis basalts Smith. 

 Nerepis, Aug. 18, one female. 



Prosopis cressoni Cockerell. 

 St. John, Sept. 8, one male. 



Prosopis modestits Say. 

 With yellow spots on collar: St. John, July 18, two males. 

 Nerepis, July 22, two males. 



Without yellow on collar: St. John, July 14, 18, six males. 

 Nerepis, July 11, 22, 24, Aug. 18, nine males. 



