160 PROC. ENT. SOC. WASH., VOL. 20, NO. 7, OCT., 1918 



THREE HUNDRED AND SIXTEENTH MEETING, NOVEMBER 6, 1918 



A NOTE ON THE HABIT OF PEGOMYIA AFFINIS STEIN AND 

 OTHER ANTHOMYID GENERA. 



BY CHARLES T. GREENE. 



At Lyme, Conn., May 13, 1918, the writer was collecting in a 

 field where there were numerous burrows of the % common ground 

 hog, Marmota. Numerous specimens of Pegomyia a finis Stein, 

 a common fly of the family Anthomyidae, were found flying 

 around the openings of these burrows. On investigation I found 

 pupae in the loose earth which was thrown out around the burrow 

 opening. A few days later the adults of this fly emerged. There 

 were no traces of excrement or any decaying material in this 

 loose earth that I could see. 



The U. S. National Museum collection contains several speci- 

 mens of this species labeled, "In dung in the den of Marmota," 

 collected by Mr. H. S. Barber at Plummers Island, Md., June 15, 

 1911. 



The larvae of Pegomyia are generally known to be leaf miners. 

 The larvae of the family Anthomyidae are rather variable in their 

 habits and it might be of interest to mention the habits of some of 

 the other genera which are as follows : Hydrotaea in cow-dung and 

 human excrement; Ophyra in human excrement, cow-dung and 

 human graves; Fannia in human excrement, dead fresh-water 

 shells, fruit and vegetables just beginning to decay; Hyetodesia 

 in cow-dung; Mydaea was reared from nestlings of Spermophila 

 sp. and nestlings of the nightingale; Limnophora in human ex- 

 crement; Anthomyia in roots of cabbage and radish; 'Hylemyia 

 in human excrement and in swelling on the wing of Picus striatus; 

 Hammomyia is parasitic on bees; Phorbia is a root miner in cab- 

 bage, radish, cauliflower, turnip, winter cress, hedge mustard, 

 celery, onion, beans, potatoes, corn, raspberry, young wheat 

 plants, stems of Lupinus albus and human excrement; Fucellia in 

 seaweeds and other refuse. 



Actual dale of publication December 4> 1918 



