A Systematic Study op the Anthomyiinae of New York 23 



Hylemyia hetarum Lintner 



1882 Chortophila hetarum Lint. 1st Rept. State Ent., p. 208-209. 



1898 Hylemyia substriata Stein. Berl. Ent. Ztschr., (1897) vol. 42, p. 233, no. 2. 



Male. — Blackish species; head blackish, with whitish pruinescence on parafrontals and 

 parafacials. Frontal vitta black, opaque. Antennae and palpi blackish. Thorax black, 

 shining, with a greenish gray hue ; viewed from behind, the humeral angles and sides of disk 

 of mesonotum with apparently light grayish pollen: with one broad median vitta and two 

 narrower sublaterals which gradually become indistinct caudad owing to the infuscation of 

 the mesonotum. Abdomen blackish, shining (the dorsal surface of terga 2 and 3 largely 

 greased), of a greenish gray hue; with an uniformly narrow mid-dorsal vitta apparent; 

 terminal segments (numbers 3, 4, and 5), including hypopygium, thickened when viewed in' 

 profile. Legs black. Wings infuacated; (halteres missing from the specimens); calyptrae 

 tinged. 



Head similar to that of substriata Stein; eyes separated at the narrowest by a distance 

 slightly greater than diameter of anterior ocellus; frontal vitta continuous between the 

 eyes, narrowly separating the parafrontals caudad, enlarging into a broad triangular vitta 

 cephalad; cruciate bristles present. Parafacials and cheeks, in profile, not noticeably 

 broad nor prominent; ventral margin of cheeks with comparatively long, conspicuous bristles, 

 directed cephalad and dorsad. Arista distinctly short pubescent, even to the apex, the long- 

 est hairs slightly longer than diameter at base of arista. Palpi linear, narrow. Thorax 

 with two pairs of presutural acrostical bristles, between which are two irregular series of short 

 hairs; pra short, less than half the length of the following bristle; posthumeral bristle not 

 dupUcated. Abdomen with stiff, erect hairs and bristles; processes of fifth sternum with a 

 fringe of erect hairs the entire length of the inner margin. Legs missing in the specimens, 

 except for mid femur and tibia. Mid femur with an iminterrupted row of bristles on anterior 

 surface; with an interrupted series of setulae on antero ventral surface, the basal setulae being 

 longer; postero ventral surface with two long, conspicuous bristles basad; mid tibia with one 

 anterodorsal, two posterodorsal, and two posteroventral bristles. Wings with cross-vein 

 m-eu slightly sinuate; lower calyptra smaller than upper, not protruding. Length, 5-6 mm. 



Female. — Similar to male except that the color is lighter, and the thorax is not so profusely 

 infuscated. Cruciate bristles present; frontal vitta reddish cephalad. Thorax with or with- 

 out presutural acrostical bristles, with three irregular series of hairs in the line of the acrosti- 

 cals. Abdomen with an indistinct mid-dorsal fascia. Wings hyaUne; veins yellowish. 

 Fore tibia with one median dorsal and one median posteroventral bristle. Mid femur with 

 one strong anteroventral bristle basad. Hind femur with a series of anteroventral bristles 

 for its entire length; with an apical posteroventral bristle, and two posteroventral bristles on 

 basal half; hind tibia with three posterodorsal, six anterodorsal, and one anteroventral 

 bristle. Fifth tergum of abdomen with erect bristles on discal surface. Length, 5-6 mm. 



Reared from beet leaves, New York, 2 males, 6 females. 



Localities — 4:6, Ithaca, May 13, 1913; 1 9 , June 26, 1915; 2 6 , July 9, 1920; 1 9 , May 2, 

 1920; 3 9 , May 23, 1920; 1 9 , Buttermilk, Ithaca, July 18, 1920; 1 6 , Lake Ridge, near 

 Ithaca, April 30, 1922; 46, Hicksville, Long Island, April 21, 1921; 16, Valley Stream, 

 Long Island, April 27, 1921; 19, Ithaca, July 30, 1920 (reared from mangold leaves). 19 

 specimens: 12 males, 7 females. Figures 12, 69, 109, on plates in this memoir. 



Through the courtesy of Mr. D. B. Young, of the State Museum, 

 the writer was enabled to examine in detail the types of Hylemyia hetarum 

 Lintner. He finds that this species is identical with Hylemyia substriata 

 Stein, and most closely resembles Hylemyia fugax Meigen. 



According to Malloch, the male of substriata can be distmguished from 

 that of fugax by the possession of a fringe of hairs along the inner margin 

 of each process of the fifth sternum (characters which substriata and 

 hetarum bear in common), as well as by its comparatively smaller size. 



