116 MISC. PUBLICATION 17 4, U.S. DEPT. OP AGRICULTUKE 



Described from 13 specimens, 11 females and 2 males, as follows : 

 Type female, allotype male, and 3 paratypes reared from Meromyza 

 americana Fitch at Sioux City, Iowa, by C. N. Ainslie under Webster 

 no. 24270 ; 4 paratypes from the same host and locality under Webster 

 no. 24273; 1 female paratype reared from Phytophaga destructor 

 (Say) at Columbia, Tenn.* by Geo. G. Ainslie, May 15, 1922, La- 

 Fayette no. 21154; 1 female paratype from P. destructor at Attica, 

 Ind., by E. G. Kelly, May 1916, under Webster no. 17322; 1 female 

 paratype from P. destructor at Wakita, Okla., by E. G. Kelly, 

 Webster no. 14492; and 1 female paratype from P. destructor at 

 Randolph, Iowa, by E. G. Kelly under Expt. no. 152449. 



This species is known only from the above-mentioned specimens. 

 Its known distribution is confined to the few Middle Western States 

 mentioned, and nothing is known of its life history. It is probably 

 of little importance as a parasite of the hessian fly. 



HALTICOPTERA AENEA (Walker) 



Dicychis aeneus Walker, Ent. Mag. 1 : 456, 1833 ; Walker, Monograpliia 

 chalciditum, p. 277, 1839 ; Westwood, An introduction to modern classification 

 of insects . . . , v. 2, synopsis, p. 68, 1840; Gahan and Fagan, U.S. Natl. Mus. 

 Bui. 124 : 44, 1923. 



Dicyclus fuscicornis Walker, Ent. Mag. 1: 456, 1833; Walker, Monograpliia 

 chalciditum, p. 456, 1839; Cunliffe, Ann. Appl. Biol. 8, no. 2, 1921 (abstract 

 in Rev. Appl. Ent. (A) 9: 533, 1921). 



Cyrtogaster liqueatus Aslnnead, Ainer. Ent. Soc. Trans. 2:336, 1894; 

 Girault, Descriptiones hymenopterorum chalcidoidicarum variorum cum obser- 

 vationibus, no. 3, p. 1, 1917 ; Griswold, Jour. Econ. Ent. 21 : 856, 1928 ; Leonard, 

 N.Y. (Cornell) Agr. Expt. Sta. Mem. 101: 980, 1928. 



Cyrtogaster occidentalis Ashmead, Amer. Ent. Soc. Trans. 23 : 230. 1896 ; 

 Webster, U.S.Dept.Agr., Bur. Ent. Bui. (n.s.) 42: 56, 1903; Luginbill and 

 Urbahns, U.S. Dept. Agr. Bui. 432: 15, 1916; Seamans, Jour. Agr. Research 9: 

 24, 1917 ; Aldrich, Jour. Agr. Research 18 : 471, 1920. 



Cyrtogaster citripes Ashmead, Amer. Ent. Soc. Trans. 23: 230, 1896. 



Polycyrtus (sic) floridanus Ashmead, Amer. Ent. Soc. Trans. 23: 230, 1896. 



Polycystics foersteri Crawford, U.S. Natl. Mus. Proc. 45: 313. 1913; Frost, 

 N.Y. (Cornell) Agr. Expt. Sta. Mem. 78: 131, 1924. 



Halticoptera fuscicornis Imms, Parasitology 22 : 13, 1930 ; 24 : 442, 1932. 



DESCRIPTION 



Halticoptera aenea is not likely to be confused with any of the 

 other parasites of the hessian fly, if attention is given to the shape of 

 clypeus, the smooth propodeum with its strong lateral folds and 

 distinct median carina, the prominent abdominal petiole with its 

 distinct median longitudinal carina, and the subtriangular abdomen. 

 The males are readily recognized by their swollen and yellow max- 

 illary palpi, their pale yellow antenna with darker club, and their 

 pale legs. 



Female. — Length 1.75 to 2.1 mm. Head transverse, plainly wider than thorax, 

 nearly four times as broad as thick antero-posteriorly at the middle; very 

 weakly concave behind ; temples receding, narrow, approximately one fourth 

 as wide as the eyes ; ocelli in a very low triangle, the postocellar line a little 

 longer than ocellocular line, the latter equal to nearly three times the diameter 

 of an ocellus; head viewed from in front subtriangular, broader than high 

 (about 30:25) ; cheeks slightly rounded, malar space equal to a little less than 

 half the eye height ; antennal scrobe shallow ; eyes ovate with very short 

 sparse pubescence ; clypeus separated from face by a definite groove, its anterior 

 margin produced into two short, blunt teeth which are separated by a deep me- 

 dian sinus ; whole head with fine, shallow reticulate sculpture which is a little 

 coarser on vertex and frons than below, the clypeal region without any con- 



