PAKASITIC DIPTERA. 389 



from pupa of P. dispar Aug. 22, 1893 n (female) ; and 

 "Emerged from gypsy moth pupae Aug. 24 (male), 27 

 (female), 29 (female), 1891; Sept. 2 (female), 1891." 



I have compared these specimens with a female type of 

 A.. (Masicera) frenchi Williston, with which the species is 

 closely allied, and find the following differences : The facial 

 bristles ascend higher in A. frenchi, reaching two-thirds or 

 more of the distance to the root of the antennae, while in 

 A. fernaldi they do not go more than half way, and some- 

 times even less than that. The bristles of the front do not 

 descend so far as in A. frenchi. But the chief difference, 

 and one by which the species will be readily recognized, is 

 the relatively much shorter third joint of the antennae in the 

 present species. In A. frenchi it is fully five times the 

 length of the second. The marginal bristles of the abdo- 

 men seem to be stronger in A. frenchi. In the type female 

 compared there are none on the first segment, but I suspect 

 that the species has them normally. 



From Achcetoneura (Masicera) sphingivoraTowns., Trans. 

 Am. Ent. Soc., Vol. XIX, page 286, the length of the 

 antennae and the red sides of the abdomen are sufficient 

 to distinguish. From A. (Masicero) eufitchim Towns, the 

 differences are also evident. 



Sarcophaga, sp. Female. Sides of the front and face 

 wholly silvery white ; median frontal stripe black. Antennae 

 black, third joint between three and four times the length 

 of the second joint. Abdomen black, silvery white, mar- 

 morate ; fourth segment wholly black. Legs black, the 

 hind tibiae not ciliate. Palpi black. Length, 12 mm. 



One specimen, labelled "From parasitic material, Aug. 

 1, 1893, Gypsy Moth Department, Maiden." The single 

 specimen is not in the best state of preservation, and it is 

 difficult, if not impossible, to either identify it with any 

 previously described species or to give a description which 

 will enable the species to be again determined with cer- 

 tainty. The diagnosis given above wil serve to exclude all 

 but nearly related species. 



Oyrtoneura stabulans. Musca stabulans Fallen. Mei- 

 gen, Schiner (Cyrtoneura}, etc. Europe, New Zealand, 

 Xorth America. 



