NO. 3533 CHALCID WASPS OF GENUS EURYTOMA — BUGBEE 513 



longer than wide and truncate distally; six separated from seven by 

 a shallow annulation; flagellum filiform. Legs may have all femora 

 and tibiae yellowish brown or hindfemora may be brown to dark 

 brown medially. Wings with the veins yellow to brown; marginal 

 vem thin and long, averaging .38 mm. (.35-.40) in length; post- 

 marginal shorter than marginal, averaging .30 mm. (.27-.32) in length; 

 stigmal club narrowly rectangular in shape. 



Male: Black. Averages 3.3 mm. (3.0-3.6) in length. Outer face 

 of scape black except yellowish-brown basal extremity. Legs with 

 femora and tibiae of fore- and midlegs yellowish brown; hindfemora 

 dark to light brown, except yellowish-brown apices and knees; hind- 

 tibiae yellowish brown. Wing veins brownish yellow to straw 

 yellow; marginal vein longer than postmarginal ; marginal averages .37 

 mm. (.35-.40) in length; postmarginal averages .27 mm. (.25-.27). 



Types: 6 females and 4 males. Holotype female, allotype male, 

 and paratypes in the U.S. National Museum (USNM 66065). Para- 

 types in the Bugbee collection, Meadville, Pa. 



Type locaUty: Troy, Kans. Collected or bred (?) July 2-14, 

 1932. P. G. Lamerson collection. 



Distribution: Kansas, New York, Wisconsin, Wasliington. 

 Hosts: Parasite of the apple curculio, Tachypterellus quadrigibbus 

 (Say), T. q. magnus List, and T. consors Dietz. 



Remarks : This species is apparently widespread, occurring wherever 

 apples are grown and its hosts, the apple curcuHo, Tachypterellus 

 quadrigibbus or T. consors, are present. The importance of the 

 parasite as a natural control of the host is great. Parker and Lamer- 

 son (1934) credit it with over haK of the total parasitism of the cur- 

 cuHo (T.q. magnus) in northeast Kansas in the years 1932-1933. 

 Ritcher (1936), using the name E. tylodermatis, states that it was the 

 most important and numerous parasite in Wisconsin in 1934-1935, 

 where parasitism ran as high as 40-63%. Hammer (1936) lists it 

 again as E. tylodermatis, from T. quadrigibbus in the Champlain 

 VaUey. 



Distinguishing features of this species are the extremely narrow 

 dorsal valves of the female genitalia, the reduced sculpturing on the 

 sixth abdominal segment, the all yellowish-brown legs with the excep- 

 tion of the reddish-brown tinge to the hindfemora, and the longer than 

 wide segments of the antenna. It resembles E.fusca, new species, but 

 the characteristics mentioned above will separate them. 



