SEEPHOID AND CHALCIDOID PAKASITES OF THE HESSIAN FLY 37 



with the median impression apparently not quite so deep and the central groove 

 usually not margined laterally. Color dull black; scape as well as rest of 

 antenna black, occasionally a little testaceous at base, the ring joint usually 

 pale ; mandibles brownish testaceous ; all coxae, all femora except apically, and 

 usually all tibiae blackish, the trochanters, knees, apices of all tibiae narrowly, 

 and all tarsi testaceous, anterior femora and tibiae sometimes mostly testa- 

 ceous ; wings hyaline, venation brownish testaceous ; ovipositor sheaths usually 

 blackish; vestiture as in phoebus, but apparently a little less conspicuous. 



Male. — Length 1.25 to 1.8 mm. Similar to the male of phoebus in every way, 

 except that the legs are darker as in the female and the funicle joints appear 

 to have the peduncles slightly longer, the thickened portions of the joints 

 being not much longer than the peduncles in some specimens. 



Type locality. — Carlisle, Pa. 



Type.— Catalog no. 44838, U.S. National Museum. 



Described from 26 specimens as follows: Type female reared at 

 Carlisle, Pa., from hessian-fly puparium, August 5, 1917, by P. R. 

 Myers; allotype reared from the same host February 1, 1920, at 

 Muncy, Pa., by Myers; 1 female paratype reared at Carlisle. Pa., by 

 Myers, July 31, 1917; 1 male paratype reared at Montoursville, Pa., 

 by Myers, July 28, 1915; 1 female, Jersey Shore, Pa., reared August 

 3, 1932, by J/S. Pinckney; 1 female reared June 14, 1916, at Wil- 

 liamsport, Md., by Myers; 1 male, Albion, JN.Y., reared by W. R. 

 McConnell, September 20, 1918; 1 female, Hardin County, Ohio, 

 reared by W. H. Larrimer; 1 female, Knoxville, Tenn., reared by 

 G. G. Ainslie; 4 males and 4 females, Vancouver, Wash., reared by 

 G. I. Reeves and M. W. Reeves in August 1911; 1 male, Kelso, Wash., 

 reared April 30, 1920, by M. M. Reeher; 1 female reared in Sep- 

 tember 1923, 1 female reared May 22, 1 male in June, and 1 male in 

 July 1924 at Forest Grove, Oreg., by S. E. Keen; 1 female, Forest 

 Grove. Oreg., August 25, 1926, reared by M. M. Reeher; 1 female 

 reared from wheat stubble at Forest Grove, Oreg., by Reeher, Sep- 

 tember 15. 1919; 1 male swept from wheat at Hagerstown, Md., by 

 W. R. McConnell; and 1 male swept from wheat at Pine Grove 

 Furnace, Pa., May 28, 1923, by Myers. All the above-mentioned 

 specimens, excepting the last three, were from the hessian fly. One 

 other female paratype was reared by C. N. Ainslie at Bottineau, 

 N.Dak., August 23, 1923, from Cephus cinctus Nort. 



Although treated here as a new species, it must be admitted that 

 this parasite cannot be separated very satisfactorily either from 

 Eurytoma phoebus Girault or from the so-called E. bolteri var. parva 

 Phillips. The antennal differences mentioned are very slight and 

 may possibly be merely the concomitant of small and poorly devel- 

 oped individuals. The color of the legs is known to be variable, 

 but specimens at hand do not show a variation wide enough to 

 bridge the gap between typical phoebus and typical specimens of 

 atripes. On the other hand, the leg color of atripes is extremely 

 similar to that of parva, and if the differences in the antennae will 

 not hold, then it will be practically impossible to distinguish the 

 present form from parva except by its smaller size. According to 

 Phillips s the normal mode of development for parva is for its young 

 larva to attack and consume the young larva of Harmolita tritici 

 in its cell and then to complete its development in the Harmolita 

 cell by feeding upon the plant sap. Specimens of atripes are said 

 to emerge from puparia of the hessian fly, and it is therefore certain 



s Phillips, Jour. Agr. Research 34: 743-758, 1927. 



