ICHNEUMON-FLIES, PART 2\ XORIDINAE 509 



second tergite as described for male; first tergite about 2.3 as long as 

 wide. 



Colored like the male except that flagellum has a white band cover- 

 ing about 4.5 segments. 



In specimens from the Southeast there is a tendency for the hind 

 coxa to be fulvous and the white band at the base of the tibia to be 

 light brown rather than white. This tendency is well illustrated in 

 the types of the name rujicoxis, from Florida. Two specimens inter- 

 mediate between these and more typical rileyi are from Tryon, N. C. 



This species has a superficial resemblance to Xorides stigmapterus, 

 but besides the structural distinctions it lacks the white band on the 

 basitarsi which is characteristic of stigmapterus. 



Specimens (27 cf, 309): From District of Columbia (Washington); 

 Florida (Apalachicola) ; Georgia (Kennesaw Mt.) ; Indiana (Mill Creek 

 Rest Camp near Manhattan in Putnam Co.) ; Maryland (Takoma 

 Park); Minnesota (Alexandria, Grant Co., and Houston); Missouri; 

 New York (Ithaca, Lake George, and Tuxedo Lake) ; North Carolina 

 (Tryon); Ohio (Carbondale, Fairfield Co., and Montgomery Co.); 

 Pennsylvania (Harrisburg and Pittsburgh) ; Virginia (Blacksburg, 

 Cherrydale, Falls Church, Nelson Co., and Veitch in Arlington Co.); 

 and Wisconsin (Madison) . 



Most dates of capture are in June and July but some are earlier, 

 a few in August, and one in November. Unusually early and late 

 dates are: April 14 at Kennesaw Mt., Ga.; May 8 at Pittsburgh, Pa.; 

 May 20 at Blacksburg, Va. ; May 28 in Houston Co., Minn. ; August 24 

 near Manhattan, Ind.; and November 7 in the District of Columbia. 



Rearing records are as follows: 2cf, from Phymatodes aereus, 

 Washington, D. C, Mar. 20, 1915, H. G. Champion. 9 , from 

 Phymatodes testaceus, Pittsburgh, Pa., May 28, 1931. 9 (type of 

 lepturae), from Anoplodera nitens, Cherrydale, Va., May 20, 1918, R. 

 W. Van Horn. Additional pin label data record the species as reared 

 twice from Castanea dentata, once from Quercus, and once from "black 

 oak." One female is labeled simply "Carya." 



This species is in the Alleghanian and Carolinian faunas. It 

 parasitizes borers in hardwoods. Adults occur mostly from late spring 

 to late summer. 



III. INSULARIS GROUP 



Body moderately slender, often more or less depressed; occipital 

 carina complete; temple with rather fine, sparse, or moderately sparse 

 punctures and except above with fine vertical striae (figs. 313, d,e); 

 tooth at upper end of epomia rather weak (for the genus); areola 

 regularly or elongate pentagonal, its basal corner sometimes open; 

 median longitudinal carinae approximate basad of areola, sometimes 



