SERPHOID AND CHALCIDOID PARASITES OF THE HESSIAN FLY 77 



Merisus subapterus Cresson, Synopsis of the families and genera of the 

 Hymenoptera of America, north of Mexico . . ., p .242, 1887; Lindeman, 

 Bui. Soc. Nat. Moscou (2) 1: 178, 1887; Viereck, Conn. State Geol. and Nat. 

 Hist. Survey Bui. 22: 480, 1916. 



Baeotomus subapterus Marchal, Ann. Soc. Ent. France 66: 81, 1897; Osborn, 

 U.S. Dept. Agr. Bui. (n.s.) 16:32, 1898; Felt, N.Y. State Rpt. Ent. 17 (Mus. 

 Bui. 53) : 721, fig. 3, 1902; Webster, U.S.Dept.Agr., Bur. Ent. Circ. 70: 12, 13, 

 fig. 16, 1906; Felt, N.Y. State Ent. Rpt. 28 (Mus. Bui. 165) : 40, 1913; Webster, 

 U.S. Dept. Agr. Farmers' Bui. 640 : 16, 20, fig. 17, 1915 ; Fyles, Ontario Ent. 

 Soc. Rpt. 46 : 56, 1916. 



Homoporus subapterus Dalla Torre, Catalogus hymenoterorum . . ., v. 5, 

 p. 91, 1898 ; Viereck, in Smith, Insects of New Jersey . . ., p. 642, 1910 ; Meyer, 

 Rpt. Appl. Ent. Leningrad 4: 241, 1929. 



Micromelus subapterus Ashmead, in Smith, Insects of New Jersey . . ., p. 558, 

 1900; Kurdjumov, Messager Ent. [Kiev] 2: 1, 1913; Packard, Jour. Agr. Re- 

 search 6: 377, 1916; McColloch, Kans. Agr. Expt. Sta. Tech. Bui. 11: 63, 67, 

 1924. 



Nemicromelus subapterus Girault, Descriptiones hymenopterorum chalcidoidi- 

 carum variorum cum observationibus, no. 3, p. 4, 1917 ; Gahan and Fagan, U.S. 

 Natl. Mus. Bui. 124: 94, 1923. 



Nemicromelus fulvipes Myers, Ent. Soc. Wash. Proc. 26: 222, 1924; Hill and 

 Smith, Jour. Agr. Research 36: 153, 155, 1928. 



Eupteromalus mdcropterus Hill and Smith (not Lindeman), Jour. Agr. Re- 

 search 36: 153, 155, 1928. 



Meraporus graminicola Blunck (Pteromalus fulvipes Forbes and Merisus 

 subapterus Riley in synonymy of), Ztschr. Angew. Ent. 18: 588, 1931. 



DESCRIPTION 



Eupteromalus fulvipes is extremely variable. Subapterous, half- 

 winged, and fully winged individuals of both sexes are common. 

 Furthermore, both sexes exhibit very marked variations in color. 

 The coxae in both sexes may be either wholly testaceous or wholly 

 metallic. Antennae of the male may be wholly testaceous or testa- 

 ceous with the last funicle joint and the club fuscous or blackish. 

 The body color ranges from nearly dead black with a very slight 

 aeneous tinge to strongly copper colored with greenish reflections on 

 some parts. The subapterous forms are usually metallic in color 

 with legs, including their coxae, all reddish testaceous, while the 

 winged forms are usually darker with the coxae more frequently 

 metallic than otherwise, but occasionally a winged female with the 

 coxae testaceous and the body strongly tinted with aeneous occurs. 

 Intermediate stages both as regards color and extent of development 

 of the wings are present. Length may vary from 0.8 to 2.5 mm. 



The species may be separated from all other hessian-fly parasites 

 except Euteromalus micropterus (Lindeman) and E. a?nericanus, 

 new species, by the presence of a delicate but distinct carina bounding 

 the occipital foramen. From both these species it may be separated 

 by the longer first tergite and the finer and deeper punctation of the 

 scutellum and mesoscutum. In females of this species the first ter- 

 gite (not counting the short petiole) is usually about as long as broad 

 and constituted approximately half the length of the abdomen, some- 

 times a little less than half, sometimes distinctly more than half, de- 

 pending upon the extent to which the apical tergites are retracted. 

 Males have the first tergite longer than in the other species, usually 

 about as long as broad, the apical segments frequently almost wholly 

 retracted within the first but also frequently distended so that the 

 first does not constitute nearly half the total length. 



