A Systematic Study of the Anthomyiinae of New York 19 



24. Mid femur with a row of posteroventral bristles, directed ventrad, along distal half; 



mid metatarsus with longish hairs on dorsum Irichodactyla Rond . 



Mid femur with posteroventral surface bare except for two or three apical setae, directed 

 apicad; mid metatarsus with no longish hairs on dorsum cilicrura Rond. 



25. Mid metatarsus with longish hairs on dorsum; parafacials and cheeks, in profile, reddish ; 



arista distinctly pubescent, the length of the longest hairs being twice that of the 



second aristal segment innocua Mall . 



Metatarsus with no longish hairs on dorsum; parafacials and cheeks, in profile, grayish, 

 with dark reflections; arista short pubescent, the longest hairs not exceeding the length 

 of the second aristal segment antiqua Meig . 



26. Hind femur with one or more median bristles on posteroventral surface, besides those of 



basal and apical setae 27 



Hind femur with posteroventral surface bare, excluding basal and apical setae 33 



27. Eyes separated by a narrow frontal vitta, parafrontals not contiguous posteriorly. . . .29 

 Eyes closely approximate, parafrontals contiguous posteriorly 28 



28. Thiid and fourth abdominal sterna with a series of long bristles on lateral margins; 



abdominal vitta uniformly broad and stripelike; fifth abdominal sternum without a 



median tuft of eetulae at base of processes spizellae sp. no v. 



Third and fourth abdominal sterna without a noticeable series of bristles on lateral 

 margins; abdominal vitta divided into broad, black, subtriangular spots; fifth abdominal 

 sternum with a median tuft of setulae at base of processes ithacensis sp. nov. 



29. Abdomen infuscated, shining, with dark dorsocentral reflections; palpi short, scarcely 



longer than third antennal segment, apices flattened laevis Stein 



Abdomen densely pollinose, with a distinct, dark, dorsocentral vitta; palpi slender, 

 filiform, exceeding length of third antennal segment 30 



30. Hind tibia reddish; abdomen covered with dense yellowish golden pollen; calyptra 



brownish trivittata Stein 



Hind tibia black; abdomen subshining, with grayish pollen; calyptra whitish 31 



31. Abdominal vitta consisting of a narrow imiform stripe; arista minutely but distinctly 



pubescent; fore tibia with a mid-dorsal bristle 32 



Abdominal vitta composed of broad subtriangular spots on each tergum; arista bare; 

 fore tibia with no mid-dorsal bristle incompicuus sp. nov. 



32. Inner margin of processes of fifth abdominal sternum with no distinct fringe of fine 



hairs; mid femur with an interrupted row of bristles on anterior surface. . .fugax Meig. 



Iimer margin of processes of fifth sternum with a dense fringe of hairs; mid femur with a 



continuous row of bristles on anterior surface betarum Lint. 



33. Pra long, exceeding half length of the following bristle; a basal tuft of long hairs and 



bristles on anterior surface of hind femur; sterna 3 and 4 with normal bristling. 



brassicae Bouch^ 



Pra short, less than half length of the following bristle; no basal tuft of long hairs and 



bristles on hind femur; sterna 3 and 4 with a series of conspicuously long bristles along 



lateral margins florilega Zett. 



Females 



1. Arista plumose, the longest hairs being equal in length to second antennal segment 2 



Arista pubescent or bare, the longest hairs not being equal in length to second antennal 



segment "1 



2. Palpi yellow; legs yellow except tarsi alcathoe Walk. 



Palpi blackish, infuscated; legs blackish • ■ 3 



3. Bluish gray species; abdomen with a black imiform dorsocentral vitta; all tibiae black. 



lasciva Zett. 



Yellowish gray species; abdomen with a brown dorsocentral vitta; hind tibiae at times 



distmctly reddish i'a'^'a ^a"- 



4. Mid and hind femora yellow ^ 



Mid and hind femora blackish ' 



