Records of Bees. 451 



punctured, first segment very sparsely 



punctured dichrous, Smitli. 



Area subcancellate with irregular wrinkles 

 (male abdomen largely red) hesperelhis, Ckll. 



3. First abdominal segment with the apical 



half very distinctly and rather closely 

 punctured ; area irregularly wi-inkled ; 

 mesothorax rather more densely punc- 

 tured than in dichroiis : abdomen broad, 



the apex hardly at all blackish arvensis, Patt., Eob. 



First abdominal segment with very sparse 

 (sometimes hardly any) punctures .... 4. 



4. Second abdominal segment, beyond the 



base, with very fine, relatively close, 



regular punctures o. 



Second abdominal segment, beyond the 



base, with very sparse punctures 6. 



o. Abdomen broad, chestnut colour ; wings 



very dark and very yellow arvensiformis, Ckll. 



Abdomen narrower, paler, the last seg- 

 ment blackened ; wings hyaline, the 



apical half smoky, but not yellowish ; 



aspect of 'S'. coluinhicp. lautus, Lovell & Ckll. 



6. Apex of abdomen broadly blackish 7. 



Apex scarcely or not blackish 8. 



7. Larger; mesothorax very shiny; wings 



hyaline olymjncus, Ckll. 



Smaller ; mesothorax duller ; wings with 

 a strong reddish suffusion ohscurans, Lovell & Ckll. 



8. Face with a little white hair, but princi- 



pally coarse black bristles ; abdomen long 

 and pale; mesothorax densely punctured, 



the posterior middle sparsely cohunbice, Ckll. 



Face with hoary white hair 9. 



9. Mesothorax smaller, very shiny, less 



densely punctured, the median sulcus 



evident arroijanus, Ckll. 



ISIesothorax larger, duller, more densely 

 punctured, the median sulcus not or 

 hardly evident persimilis, Lovell & Ckll. 



The three species of Lovell and Cockerell are from Maine, 

 and are described in a paper which has been sent to ' Psyche ' 

 for ptiblication. 



IlaVictus scrophular'ue, Ckll., 1906. 

 Mr. S. A. Rohwer took 17 females at Florissant in June 

 1907 ; of these, 15 were at flowers of SaVi.c hrachycarpa, oiip, 

 at Rihes vallicola, and one at Taraxacum taraxacum. The 

 tltorax varies from blue-green to brassy green. 



Andrena Porlerce, Ckll., 1900. 

 Florissant, 7 females, June 16, 1907 (S. A. Rohioer). Five 

 were at Rihes longijlorum*^ two at R. pumilum. 



* The mountain form of B. lonrjiforum is i?. leiohotri/s, Koeline, as I 

 learn from Dr. N. L. Britton. I understand that it will be regarded 

 as distinct in a forthcoming part of ' North American Flora.' 



