A Systematic Study of the Anthomyiinae op New York 11 



uniform pair of presutural acrostical bristles caudad of the strong median 

 pair; the fore tibia possesses one longish posterior bristle and one weak 

 dorsal bristle, the mid femur has the antero ventral surface bare; the mid 

 tibia has one anterior, one anterodorsal, one poster odorsal, and two weaker 

 posterior bristles;' whereas, in humeralis, the fore tibia possesses two strong 

 dorsal and two strong posteroventral bristles, and the mid tibia has two 

 anteroventral and one anterior setae, one noticeably stout and long antero- 

 dorsal and posterodorsal bristle, and two weak posterior bristles. The 

 processes of the fifth sternum in the specimens from Ithaca and Idaho 

 are ahke, so far as can be seen. 



Eremomyia vernalis sp. nov. 



Male, — Blackish species, with dense, light grayish pollen, subshining. Head blackish; 

 parafrontals, parafacials, and cheeks with dense, silvery gray pruinescence. Antennae, 

 palpi, and proboscis, blackish. Thorax, viewed from above and in front, with a broad, 

 brownish gray, median vitta, and faint indications of two narrow sublaterals; lateral margins 

 of notal disk with dark fascia; humeral and notopleural callosities with Ught grayish 

 pollen. Abdomen, viewed from above and behind, with dense light grayish pollen; a 

 broad, vmiform, dorsocentral vitta; hypopygium shining. Legs blackish. Pulvilli fuscous. 

 Wings tinged with yellow; veins yellowish brown; cross-veins clear. Calyptrae whitish. 

 Halteres yellowish. 



Eyes separated, at narrowest part, by a distance equal to diameter of anterior ocellus. 

 Parafrontals and parafacials, in profile, not prominent, the latter receding to narrow propor- 

 tions ventrad; cheeks smooth, tapering caudad, bristles confined to ventral margin; vibrissae 

 longish, with few accessory setulae. Second antennal segment rugose, shining, with four 

 or more punctures toward distal margin on inner side; third antennal segment villous, about 

 twice as long as second; arista bare, with minute hairs at base. Thorax with numerous 

 accessory setulae; one moderately stout pair and one weaker longish pair of presutural 

 acrosticals, the remainder setulose; postsutural acrosticals hairlike; pra longer than posterior 

 notopleural bristle. Sternopleurals, 1:3, the ventral bristle of the posterior group weaker 

 than the upper two. Abdominal terga with dense, strong, semi-erect bristles and setulae; 

 first and second abdominal sterna with a dense growth of fine, weaker bristles; third and 

 fourth sterna with fewer and more scattered setulae; hypopygium clothed with fine, curUng 

 hairs and bristles; processes of fifth sternum with fine hairs along inner margin. Fore tibia 

 with one anterodorsal and two longish posteroventral bristles. Mid femur with a small tuft 

 of fine, longish setae at base of posterior surface; basal bristle on ventral surface fine, and 

 curving apicad; posteroventral surface with two or three bristles along proximal half; mid 

 tibia with one anterodorsal, one posterodorsal, and three posteroventral bristles.. Hind femur 

 with a series of strong anteroventral bristles, one or more posteroventral bristles, and an 

 apical series of fine posteroventral setae; hind tibia with two anteroventral, two or three 

 anterodorsal, and three or four posterodorsal bristles; posterior surface apparently without a 

 series of setulae, the presence or absence of these being difficult to discern because of the 

 hairy character and semi-erect position of the hairs of the hind tibiae. Pulvilli and claws 

 large. Costal thorn small. Upper calyptra coveiing the lower. Length, 5-6 mm. 



Female. — Similar to male except for the following characters: Color cinereous, a lighter 

 shade than in male, with ashy gray pollen. Parafrontals, parafacials, and cheeks grayish 

 pruinose, with dark reflections. Frontal vitta reddish anteriorly. Abdomen non-vittate. 

 Eyes separated by a broad frontal vitta; cruciates absent or weakly developed. Proboscis 

 stout. Abdomen sparsely covered with weaker, more appressed bristles and setulae. Fore 

 tibia with one dorsal and one posteroventral bristle. Mid femur with one proximal antero- 

 ventral bristle, and two or three proximal posteroventral bristles; mid tibia with one or two 

 anterodorsal, one posterodorsal, and two posteroventral bristles. Hind tibia without a series 

 of setulae on posterior surface. Tarsal claws and pulvilli short. Length, 6-7 mm. 



