Robertson — New or Little Known North American Bees. 45 



spot in front and behind, and tarsi yellow; ventral segments 

 4 and 5 short, emarginate. Length 9-12 mm. 



Carlinville, Illinois ; 34 5, 38 $ specimens. 



The male is larger than that of H. ligatus Say and smaller 

 than that of II. parallelus Say (= H. occidentalis Cr.) and 

 may be distinguished from both by its darker antennae and 

 mandibles. 



Halictus lustrans Ckll. 



Panurgus lustrans Cockerell, Trans. Am. Ent. Soc. 24: 147. $. June, 

 1897. 



Halictus lustrans Robertson, Ent. News 8: 172. Sept. 1897. 



Hemihalictus lustrans Cockerell, Can. Ent. 29: 288. Dec. 1897. 



I have a specimen from Cockerell. This and H. anomalus 

 have only two submarginal cells. They are each more closely 

 related to certain groups of Halictus than those groups are to 

 each other. 



Sphecodes minor, n. sp. 



5. — Black, the abdomen red ; head closely punctured, more 

 sparsely on clypeus and on each side of ocelli ; mandibles 

 bidentate, rufo-pieeus at apex ; antennae dull testaceous at 

 apex beneath, joints of flagellum about as long as wide; 

 mesonotum smooth and shining, sparsely and rather coarsely 

 punctured, a fine median line slightly impressed, or even 

 raised anteriorly; scutellum sparsely punctured; metathorax 

 truncate, coarsely reticulated ; wings somewhat clouded be- 

 yond middle, nervures, stigma and tegulae dark, second sub- 

 marginal cell narrowing above ; abdomen shining, almost 

 impunctate, entirely red. Length 8-10 mm. 



Carlinville, Illinois ; 10 $ specimens. 



This species runs smaller than 8. dichrous Sm. (=#. 

 arvensis Pttn.), though some examples of the latter are no 

 larger, and a little larger than 8. confertus Say (= 8. 

 falcifer Pttn.). It differs from 8 . dichrous in having the 

 punctuation of the head and thorax finer, though of the same 

 style, the metathorax more rugose, the abdomen brighter 

 red, without black apex and without the strong punctuation. 



