O. A. JOHANNSEN 387 



Anthomyiinae { = Hylemyiinae-Pegomyiinae Schn.-Dz.) 



The genera thus far found in New York are Hammomyia, 



Hylephild, ' tiylemyia; Chortophila { = P)xorhia), Hydrophor'a, 

 Eusialomyia, Eremomyia, Anthomyia and Pegomyia. 



HAMMOMYIA Rondani 



In this genus the head is strongly inflated or buccate, the front 

 projecting out from between the eyes, with broad genae and 

 buccae; the arista plumose or long pubescent; the frontal stripe 

 is narrow in both sexes and cruciate setae on the front of the 

 female are present. If Hylephila is to be maintained then both 

 H. maculdia and unilineata, assigned to Hammomyid in Aldrich's 

 Catalogue, should be transferred to the former genus. 



Hammomyia setigera n. sp. 



Male. Length 6 mm. Head black, silvery gray pruinose with black 

 reflections; in profile the genae are a;bout half, the buccae nearly as broad aa 

 the width of one eye; setae of the vertex, front, lateral oral margin and the 

 lower margin 6l the buccae rather dense; frontal setae about ten in number, 

 closely set, thfe lowermost about on line with base of the anteimae. Face 

 concave in profile; oral margin rather prominent; antennae black, third joint 

 twice as long as the second, not reaching the oral margin; arista thickened at 

 the base, short plumose. Fr6nt and frontal stripe diill black, at the narrowest 

 point but little broader than the diameter of the anterior ocellus; orbits gray 

 pruinose, at narrowest point about half as wide as the frontal stripe; proboscis 

 and palpi piceous. Thorax black, blui.^h gray pruinose, with three narrow 

 vittae, the laterals on line with the dorso-central setae. Dorso-centrals 2+3; 

 sternopleurals 1 +2 mingled with a number of long fine hairs; "pra" nearly as 

 long as the seta which' follows it. Scutellum \idth a pair of strong basals, 

 strong subapicals, small apicals, a pair of slender discals, beside some finer 

 discal hairs; the pubescence of the lower surface restricted to a few fine pale 

 hairs. Abdomen gray pruinose, viewed from the side showing indistinct darker 

 triangular reflecting spots, which when viewed from behind are usually bi- 

 sected by a gray longitudinal line. The abdomen is narrow, elongate, each 

 segment with numerous slender setae both dorsally and ventrally; setae of the 

 sternites short, dorsal marginal setae somewhat stronger than the discal setae; 

 fifth sternite and the hypopygium as figured (figs. 1,2). Legs black; middle 

 femur with three or four strong setae on the underside and an obu(}ue row of 

 three or more near the apex on the hinder side. Fore tibia with two or three 

 small setae on the front (extensor) side beyond the middle, and one large outer 

 lateral at the middle; middle tibia with two ^etae on the front side beyond the 

 middle, ' two or three on the posterior extensor a!nd two on the posterior flexor 

 side; hind tibia with three on the outer flexor, tht-ec to five on the outer extensor 

 and three to five on the inner extensor side. Tarsal claws strongly setulose, not 



TRANS. AM. ENT. SOC, XLII. 



