A Systematic Study of the Anthomyiinae of New York 15 



4. Processes of fifth sternum with long, curling hairs and bristles; third antennal segment 



twice as long as second; sternopleurals, 2:2 uniformis Mall. 



Processes of fifth sternum with short hairs and bristles, the inner border matted with 

 dense, short, black hairs; third antennal segment three times as long as second; sterno- 

 pleurals, 1:2 orientalis sp. nov. 



5. Calyptrae brownish; posteroventral angles of fourth tergum with strong bristles. 



flavohalteraia Mall. 



Calyptrae whitish; posteroventral angles of fourth tergum with a dense tuft of short, 



fine bristles ambigua Fall . 



Females 



1. Hypopleura with hairs on upper margin in front of spiracle; mid tibia with no antero ventral 



bristle divisa Meig, 



Hypopleura without hairs on upper margin in front of spiracle; mid tibia with an antero- 

 ventral bristle 2 



2. Abdomen partly yellowish testaceous at base; legs yellowish brown ruralis Meig. 



Abdomen wholly blackish; legs blackish 3 



3. Hind femur with several long, fine bristles along basal half of posteroventral surface. . . .4 

 Hind femur bare on posteroventral surface except for the usual apical setae; one basal 



bristle present ambigua Fall . 



4. Parafacials, in profile, but little narrowed ventrad, at base of antennae equal in breadth 



to width of third antennal segment; presutural acrosticals represented by four or five 



series of weak hairs flavohalteraia Mall. 



Parafacials in profile narrow, not equal in breadth to width of third antennal segment; 

 presutural acrosticals represented by three or four pairs of setulae with a few scattered 

 hairs between them uniformis Mall. 



Hydrophoria ambigua Fallen 



1823 Musca ambigua Fall. Muse. p. 56, no. 43. 

 1838 Anthomyza lineatocollis Zett. Ins. Lapp., p. 679, no. 78. 

 1862 Spilogaster divisa Schin. nee Meig. Fauna Austr., pait 1, p. 609. 

 Records. — Earliest: Ithaca, June 19, 1920. Latest: Coy's Glen, Ithaca, September 10, 

 i J20. 36 specimens: 14 males, 22 females. Figures 48, 88, 148, 169, on plates in this memoir. 



Hydrophoria divisa Meigen 



1826 Anihomyia divisa Meig. Syst. Beschr., vol. 5, p. 99, no. 27. 



1830 IHydroTphoria nymphaeae Rob.-Desv. Essai Myod., p. 504, no. 2. 



1830 1 Hydrophoria trapae Rob.-Desv. Essai Myod., p. 505, no. 3. 



1830 IHydrophoria nymphaeicola Rob.-Desv. Essai Myod., p. 506, no. 7. 



1830 IZaphne hylemyoidea Rob.-Desv. Essai Myod., p. 527, no. 1. 



1830 IZaphne egerioidea Rob.-Desv. Essai Myod., p. 527, no. 2. 



1835 Hylemyia dispar Macq. Hist. Nat. Ins. Dipt., vol. 2, p. 317, no. 7. 



1845 Aricia ambigua Zett. p. p. Dipt. Scand., vol. 4, p. 1415. 



1845 Anthomyza coronata Zett. Dipt. Scand., vol. 4, p. 1658, no. 23. 



1866 Hydrophoria brunneifrons Rond. nee Zett. Atti Soc. Milano, vol. 9, p. 141, no. 4. 



1890 lAnthomijza dignota Bidenk. Ent. Tidskr., vol. 11, p. 199. 

 Localities.— 1 6 , Ithaca, May 17, 1913; 1 9 , no date given; 1 6 , Herkimer, August 8, 1921 



(collected by M. D. Leonard). 3 specimens: 2 males, 1 female. 



Hydrophoria flavohalteraia Malloch 



. 1920 Mall. Trans. Amer. Ent. Soc, vol. 46, p. 171. 



Localities.— 1 5 , Staten Island. July 23, 1921; 1 6 , Watchogue, July 14, 1921 (collected by 

 M. D. Leonard). 2 specimens, both males. 



