120 ENTOMOLOGICAL SOCIETY 



repens, April 14. At Manitou, April 28, I took a female at 

 Salix. At Florissant, in 1907, June to August, Mr. S. A. Roh- 

 wer took females at Linum lewisii, Senecio tridenticidatus, and 

 Taraxacum taraxacum. 



Halictus trizonatus Cresson. 



Pecos, N. Mex., June 24, ? at flowers of Fallugia (W. P. 

 Ckll.). 



Halictus sis5mibrii Ckll. 



Pecos, N. Mex., July, females at flowers of Clematis ligusti- 

 cifolia (W. P. Ckll.) ; Pecos Caiion, $ at flowers of Lappida 

 floribunda, July 12 (Ckll.). Florissant, Colo., at flowers of 

 Salix hrachycarpa, June (S. A. Rohwer). 



Halictus lerouxii Lep. 



Colorado Springs, Colo., ? at flowers of Salix, April (W. P. 

 Ckll.) ; Florissant, ? at Taraxacum taraxacum-, June, 1907 

 (Rohwer). -^ 



Halictus farinosus Smith. 



Mountain View, Cal. (Ehrhorn). Best distinguished from 

 H. lerouxii by the large size and serrate (not dentate) hind 

 spur; the color of the hair-bands is not reliable for separation. 



Halictus armaticeps Cresson. 



Mesilla Park, N. Mex., at flowers of peach, March 4, 1899 

 (Ckll.) ; Boulder, at flowers of Grindelia, Aug. 7 (W. P. Ckll.). 



December 5, 1907. 



The 217th meeting was held at the Ssengerbund Hall, 314 

 C street, N. W. President Hopkins presided and there were 

 present Messrs. Burgess, Burke, Crawford, Davis, Foster, Gill, 

 Girault, Hall, Heidemann, Howard, Hopkins, Jenne, Johnson, 

 Marlatt, Marsh, Patten, Popenoe, Quaintance, Sanders, Sass- 

 cer, Schwarz, Scott, and Webb, members, and Messrs. Jones, 

 Kraus, Shawhan, and Wilson, visitors. 



Messrs. R. W. Van Horn and E. R. Jones, of the Bureau 

 of Entomology, U. S. Department of Agriculture, were elected 

 to active membership. 



Mr. Marlatt presented the following paper : 



