50 Trans. Acad. Sci. of St. Louis. 



Panurginus solidaginis Rob. 



Calliopsis solidaginis Robertson, Trans. Am. Ent. Soc. 20: 274, $>. 1893. 



$. — Closely resembles the male of the preceding, but the 

 median face of labrum is not so strongly narrowed as in that 

 species or P. labrosus. Length, 5-6 mm. 



Carlinville, Illinois; 11 $, 7 £ specimens. 



Panurginus rugosus Rob. 



Calliopsis rugosus Robertson, Trans. Am. Ent. Soc. 22: 121. 9c?« 1895. 



Calliopsis f rater cuius Cockerell, Can. Ent. 28: 159. ^9. 1896. 



Pseudopanurgus fraterculus Cockerell, Can. Ent. 29: 290. 1897. 



From comparisons with P. aethiops Cr. it is evident that 

 Prof. Cockerell was not aware that that species already had 

 three " fraterculi " in P. mexicanus Cr., P. scaher Fox and 

 the above. The form of the tubercle at vertex varies in both 

 sexes. I have 14 $, 6 ^ specimens. 



Cockerell on Panurgus and Calliopsis, Can. Ent. XXIX., 

 287-90. — From comparisons with European material received 

 from Friese of Innsbruck, the author refers Calliopsis com- 

 positarum and rudbecJciae to Panurginus. I accept this and 

 refer C. asteris and parvus to the same genus, as also the 

 other species indicated above. The reference of Panurgus 

 marginatus to Halicloides is probably correct and P. novae- 

 angliae goes with it. 



Prof. Cockereirs treatment of these genera is likely to 

 create an erroneous impression. In Trans. Am. Ent. Soc. 

 24: 150, he says: " It is perfectly evident that the so-called 

 species of Panurgus of North America are not all of the same 

 genus," and, in place cited above, "The result is extremely 

 interesting, and seems to show that we have for many years 

 been placing bees in genera to which they by no means belong.' ' 

 To those acquainted with the literature and the bees in question 

 this has been clearly understood, at least since it was distinctly 

 stated by Cresson ten years ago. In the Synopsis, 134, Cres- 

 son says: "The genera Panurgus, Calliopsis and Perdita, 

 have been made the receptacle for a number of species which 

 do not properly belong to either of those genera, and have 

 been placed there provisionally until more abundant material 

 can be obtained, when a more careful study may be made of 

 their characters/ ' 



