36 MISC. PUBLICATION 174, U.S. DEPT. OF AGRICULTURE 



eluded it. without comment, in a tabular arrangement of collection 

 data showing the relative values of the various parasites on the 

 spring generation of the hessian fly in the region of Pennsylvania, 

 Maryland, and Virginia. 



HOSTS AXD LIFE HISTORY 



This species is probably normally parasitic upon jointworms in- 

 festing wild grasses. The type specimens, according to the original 

 notes by C. X. Ainslie. were reared from galls on Elymus canadensis, 

 and a species of Harmolita is said to have been reared from the same 

 material. One specimen in the Xational Museum collection is said 

 to have been reared from a gall of Harmolita, tritici (Fitch) by T. R. 

 Chamberlin. another is said by the same collector to have been 

 reared from Elymus. while two others were reared by E. G. Kelly 

 from Harmolita galls on Elymus. The following specimens have 

 been reared from puparia of the hessian flv : 2 males bv P. E. Myers 

 at Carlisle, Pa., 1 female by C. C. Hill and H. D. Smith at Palmyra. 

 Pa., 2 females by S. E. Keen at Forest Grove, Oreg., and 1 male by 

 M. M. Keener at Molalla. Oreg. 



Myers manuscript states that examination of the hessian-fly 

 puparia from which this species emerged indicated that it developed 

 as a primary, external, solitary parasite of the fly larvae. Nothing 

 further can be said of its biology. 



DISTKIBUTIOX 



Eurytoma plxoebus appears to be widely distributed, specimens 

 having been taken at Carlisle and Palmyra. Pa.: Elk Point, S.Dak. : 

 "Wellington. Kans. : and Forest Grove and Molalla, Oreg. 



IMPOETAXCE 



This species is of no importance as a parasite of the hessian fly, 

 only six specimens having been reared from the many thousands of 

 fly puparia collected in connection with the extensive investigations 

 of fly parasites by the Bureau of Entomology in recent years. 



EURYTOMA ATRIPES, new species 



Eurytoma atripes differs structurally from the preceding species. 

 E. phoebus, only by having the antennae shorter, the first funicle 

 joint in the female being very little longer than the pedicel, and none 

 of the funicle joints more than one and one half times as long as 

 thick. Typical specimens may be separated from phoeous at once, 

 however, by the differently colored legs, which in phoebus are all 

 testaceous except the coxae, while in this supposedly new form they 

 are mostly black. The new species is also extremely similar to E. 

 bolteri var. parva Phillips, from which it can be separated only by 

 its smaller size and the shorter funicle joints. 



Female. — Length 1.6 to 2.5 mm. Agrees with the description of E. phoebus 

 except in the following particulars : First funicle joint about one and one half 

 times as long as broad, only a little longer than the pedicel : second, third, and 

 fourth funicle joints subequal. each very slightly longer than broad and only 

 a little shorter than the first joint; fifth funicle joint about as broad as long: 

 club similar to that of phoeous but with the basal joint a little less distinctly 

 separated from the other two. Propodeum similar to that of phoebus, but 



