48 Trans. Acad. Sci. of St. Louis. 



Stelis lateralis Cr. 



Stelis lateralis Cresson, Proc. Eat. Soc. Phil. 2: 410. ? (?). 1864. 



£. — Typically the abdomen has ten spots which are elongate 

 and indented posteriorly, the first three segments usually 

 showing the rounded lateral portions of these spots. It may 

 become 12-16 spotted by the marks on segments 3-5 breaking 

 into spots. 



<j>. — The abdomen is 8-14 spotted, in various combinations, 

 the spots on 5th segment wanting or nearly so, and those on 

 4th small. 8-spotted examples may have four spots on each 

 extreme side, or three on each side and two sub-discal on the 

 4th segment. 



Carlinville, Illinois: 9 £, 8 $ specimens. 



I think the type specimen is a male. 



Megachile exilis Cr. 



Megachile exilis Cresson, Trans. Am. Ent. Soc. 7 : 224. 1879. 



This was determined for me by Mr. Cresson. Thirty local 

 males differ from the type by having the anterior tarsi black 

 iustead of pale ferruginous. 



Calliopsis andreniformis Sm. 



Calliopsis andreniformis Smith, Brit. Mus. Cat. Hym. 1: 128. 9. 1853. 



In the Synopsis, 295, Cresson indicates that C. flavipes 

 Sm. is the male. To be sure, Dalla Torre retains the latter 

 name, but the American part of his catalogue is not connected 

 with the literature. Several times I have taken the sexes in 

 copula. 



Panurginus labrosus Rob. 



Calliopsis labrosus Robertson, Trans. Am. Eat. Soc. 22: 123, in part. 



J*?. 1895. 



§. — Black, shining, thinly pubescent ; face with shallow 

 punctures of medium size, rather sparse, except above anten- 

 nae ; labrum with median space striate, strongly narrowed to 

 a truncate or rounded apex ; third joint of antennae about as 

 long as two following together, middle joints of flagellum 

 testaceous beneath; mandibles rufopiceus ; anterior and 

 middle knees and tubercles yellow ; prothorax and about 

 tubercles with short ochraceous tomentum ; mesonotum shin- 



