T. D. A. COCKERELL. 168 



THE BEES OF THE GEXUS HAEICTUS FOIH^D 

 IN MEW MEXICO. 



I.— SPECIES WITHOUT ANY GREEN OB BLUB. 

 BY T. D. A. COCKERELL. 



(A.) Tolerably large black impedes with hair-bands on the abdomen. 

 (1.) Females with the cheeks armed beneath, males with the cly- 

 peus and legs partly yellow ; stigma honey-yellow. 



Halictiis ligatiis Say. 



A common and rather variable species ; collected as follows : 



Las Cruces, New Mex., on Sisymbrium ccmescens April 12, 1895, 

 9 , several ; on SoUdaf/o canadensis Nov. 15, 1895, 9 ; on Salix 

 May 3, 1896, 9 ; on plum March 23, 1896, 9 ; on SpJueralcea an- 

 gustifolia September 22, S ; on garden Cosmos October 19, S ; on 

 Bidens October 19, 9 ; t^n Bigelovia wrightii September 23, 9 ; on 

 Aphanostephus ramosissimus April 26, 9 , several. 



Mesilla, New Mex., females flying in numbers about and settling 

 on Actlnella )ichardsoid by the river, May 10, 1896. They were 

 loaded with the orange pollen. 



Santa Fe, New Mex., July 6, three females. These are smaller 

 than the average of those from the Mesilla Valley. Also one 1 , 

 July 27, 1895, on Radbeckia laciniata. 



(2.) Females with the cheeks unarmed. 



(a.) Stigma honey color, or at least not dark brown. 

 (a.) Teguhe dark piceous, larger species. 



i. Wings tinged yellowish. 

 Halictii!<« forbesii Eob. 



Found by Prof. E. O. Wooton on Ruidoso Creek, 6400 feet, on 

 Pentstemon July 8, two females ; and at 6600 feet, on Erysimiun, 

 July 3, one female. I took one at Bernalillo, New Mex., at the 

 beginning of July. I have never seen it in the Mesilla Valley. 



ii. Wings not tinged yellowish. 

 Halictiis barilus Cress. 



One 9 , Little Mountain, Mesilla Valley, New Mex., on Strephai- 

 thus carinat'us, March 26, 1895. It is very near to forbesii, but 

 differs thus : 



forbesii. bardiis. 



Wings tinged yellowish. Wings clear, not at all yellowish. 



Stigma without a dark margin. Stigma darker, with a dark margin. 



Nervures honey color. Nervures fuscous. 



Hair bands of abdomen more or less Hair bands of abdomen white, 

 tinged with ochraceous. 



TRANS. AM. ENT. SOC. XXIV. JUNE, 1897. 



