PROC. ENT. SOC. WASH., VOL. 22, NO. 9, DEC., 1920 241 



This species and (Pteromalus} Hypopteromalus tabacum Fitch 

 were declared to be the same species by Riley (1881, 1883) and 

 later by Girault (1912). 



Unfortunately the types of Walsh's species are lost. The 

 national collection contains specimens, however, reared from the 

 army-worm in August, 1X7.1, apparently by Riley, and labelled in 

 Riley's hand "Glyphe viridascens Walsh." These specimens are 

 erroneously labelled types. They cannot be the actual Walsh 

 types since the rearing date is some thirteen yeais subsequent 

 to publication of the description. They do fit Walsh's description 

 perfectly however, and are undoubtedly representatives of the 

 species to which he gave the name Glyphe viridescens. 



Types of Hypopteromalus tabacum Fitch are in the national 

 collection in a fair state of preservation. They disagree in several 

 important particulars with Walsh's description of viridescens. 

 According to Walsh viridescens is 0.07 of an inch in length, dark 

 green, verging on black in color, the abdomen black. Fitch's 

 tabacum, on the other hand, as shown by the types, averages 2..". 

 mm. in length, is bright blue-green in color with little or no 

 suggestion of blackish on head and thorax, the abdomen more or 

 less blackish in some lights but for the most part highly polished 

 blue-green. There are other slight points of disagreement, but 

 those pointed out are sufficient to demonstrate that what Walsh 

 was describing was not the tabacum of Fitch. 



If the foregoing conclusion regarding the identity of viridescens 

 is correct then it and tabacum are not congeneric. The former 

 species has the head, viewed from in front distinctly broader than 

 long, the occiput distinctly margined, the scutellum broad and 

 flattened dorsally, and the abdomen sessile as that term is used 

 in the Pteromalidae. It belongs in the genus Eupteromalns 

 Kurdjumov. 



The species tabacum which is type of the genus Hypoptenualns 

 has the head viewed from in front nearly circular the vertex 

 strongly arched above the eyes, the occiput entirely immargined, 

 the scutellum convexly rounded above and the abdomen distinctly 

 petiolate. Until the Pteromalidae undergo a thorough revision 

 the genus Hypopteromalus should be retained. 



Hypopteromalus tabacum Fitch. 



Pteromalus tabacum Fitch, Trans. N. Y. Agr. Soc., 23, 1863, p. 792. 

 Pteromalus tabacum Fitch, 6th-9th Rept. Ins. New York, 1865, p. 22.Y 

 Glyphe viridascens Riley, Trans. Ac. Sci. St. Louis, 1881, p. 302 (in part). 

 Glyphe viridascens Riley, 3rd Rept. U. S. Ent. Comm., 1883, p. 127 (in part 

 Aetroxys tabacum Carman, 3rd Rept. Ky. Exp. Sta., 1890, pp. 35 and :'><i 

 Ilypopteramalus tabacum Garman, Kentucky Agr. Exp. Sta., Bull. (Hi, 1X'.<7. 



p. 2S. 



