28 MISC. PUBLICATION 17 4, U.S. DEPT. OF AGRICULTURE 



hyaline, venation yellow; abdomen entirely yellowish, sometimes with an 

 admixture of brownish on the sides ; ovipositor sheaths blackish. 



Male.— Length 1.9 to 2.25 mm. Antennae with the flagellar joints thick, all 

 of nearly the same width, or successively increasing very slightly in thickness, 

 and all distinctly broader than long ; pedicel short, not twice as broad as 

 long ; funicle and club joints densely clothed with short hairs ; club not or 

 scarcely thicker than funicle. The propodeal carinae very indistinct or lack- 

 ing, the propodeum nearly smooth medially ; abdomen shorter than thorax, short 

 ovate, with moderately strong sculpture dorsally. Head, thorax, abdomen, 

 coxae, and femora bright metallic green; tegulae, trochanters, apices of all 

 femora, and tibiae and tarsi pale yellowish ; antennal scape dark metallic, 

 flagellum including club black. Otherwise like female. 



Described from about 85 specimens in the National Museum col- 

 lection inclusive of the type series of aureoviridis Crawford and 

 flavicoxus Gahan. Eleven of these specimens, according to the label- 

 ing, were reared from the hessian fly at Jackson, Mo., by E. G. Kelly. 

 Other specimens reared from the same host in Pennsylvania have 

 been identified by the writer and returned to the Carlisle, Pa., labora- 

 tory of the Bureau of Entomology. 



KEVIEW OF LITEKATUEE 



Ditropinotus aureoviridis was first described by Crawford in 1907 

 from a series of specimens reared by W. J. Phillips from the wheat 

 jointworm, the host material having been collected at Hudson, Mich., 

 and Richmond, Ind. In the Department of Agriculture Yearbook 

 for 1907, F. M. Webster figured the female and expressed the opinion 

 that this parasite probably had been responsible for the disappear- 

 ance of the wheat jointworm in Ohio, Michigan, and Indiana during 

 that season. In a bulletin of the Bureau of Entomology appearing 

 in 1908, he again referred to it as a common and efficient parasite of 

 that pest. In 1911 J. S. Houser gave a short account of the species, 

 including some observations on its life history as a parasite of 

 Harmolita tritici in Ohio. Phillips mentioned it in connection with 

 the same host in 1917, and again in 1918, when he gave a figure of 

 the female. The species was listed by Lochhead in his textbook of 

 economic entomology published in 1919 as one of several parasites 

 of the wheat jointworm, and in 1920 Pettit and McDaniel, treating 

 of the jointworm in Michigan, figured the female of D. aureoviridis, 

 which they found to be the commonest parasite. A detailed account 

 of the life history of this parasite, accompanied by figures of egg, 

 larva, pupa, and both sexes of the adult, was published by Phillips 

 and Poos in 1921, and the same authors again mentioned the species 

 in a Farmers' Bulletin published in 1923. A thesis on the postem- 

 bryonic forms of chalcid flies by Parker in 1924 included comments 

 on the larva of D. aureoviridis, these remarks being based upon the 

 work of Phillips and Poos. Phillips in 1927 recorded the species 

 as a parasite of Eurytoma parva Phillips, and the following year it 

 was for the first time recorded as attacking the hessian fly by Hill 

 and Smith. It was listed by Leonard in 1928 in his memoir on the 

 insects of New York and again briefly referred to by Larrimer in 

 1931 in the course of some remarks about the effect of the previous 

 season's drought upon the jointworm and other insects. 



Ditropinotus flavicoxus, described by the present writer in 1912, was 

 designated by him a synonym of aureoviridis in 1920. The types of 

 flavicoxus were collected in a storeroom containing meal and other 



