THE CANADIAN ENTOMOLOGIST. 287 



one from me. Mr. L. O. Howard, however, tells me 

 he has a good series in the National Museum at 

 Washington. It is by no means common at Massett, 

 for I have only taken nine in seven years, and never 

 more than three in one year. It has occurred always 

 in the same spot — on the under side of a rotten 

 spruce log on the ground. From positions 1 have 

 taken it in I conclude that it feeds either on the 

 rotten wood or on minute fungoid growths on the 

 F,G, 36_ wood. On one occasion I obtained two specimens 



by pouring water into the log, which is now soft and fibrous with age, 

 when they emerged from holes. The insect is slow and deliberate in its 

 movements, and makes no attempt to fly when disturbed It has 

 occurred only in early spring ; several of my specimens were taken in the 

 middle of February when snow was on the ground. 



ON THE GENERIC POSITION OF SOME BEES HITHERTO 

 REFERRED TO PANURGUS AND CALLIOPSIS. 



BY T. D. A COCKERELL, MESILLA, N. MEX, 



Having lately received from Mr. Friese, of Innsbruck, a number of 



European bees, I have been led to re-examine certain of our species, in 



order to determine their relationship to a number of old-world genera not 



supposed to occur in America. 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. The following table may be used 



provisionally to separate the genera under discussion* : 



A. Tongue more or less short and broad, tapering at the end. (An- 

 dreninaj). 



1. Basal nervure nearly or quite straight. 



a. Three submarginal cells Afidrena, Fabr, 



b. Two submarginal cells Parandrena, Rob. 



2. Basal nervure strongly bent. 



a. Three submarginal cells Halictus, Latr. 



b. Two submarginal cells Hemilialictus^ Ckll. 



*Mr, Friese sends me also four examples ol Nomioides piilchcllits, .Schenck, taken 

 at Pest on the second of June. This bee is a Perdita with the venation oidin Halicius! 

 It is curious to see all the ornaments, sculpture, etc, oi Perdita, with a long tapering 

 marginal cell and three submarginals. It is evident from this, and from the absence of 

 Perdita in the American tropics, that our genus is of boreal origin, not austral, as I 

 formerly thought. 



