DESCRIPTIONS OF TWENTY-FIVE NEW SPECIES OF NORTH 

 AMERICAN HYMENOPTERA. 



By S. A. RonwER, 



Of the Bureau of Entomology, United States Department of Agriculture. 



The following pages contain the descriptions of 25 new spe- 

 cies of Hymenoptera which have been submitted for identifica- 

 tion. The types of all the species are in the United States National 

 Museum. 



Superfamily MEGALODONTOIDEA. 

 Family MEGALODONTIDAE. 



ITYCORSIA ZAPPEI, new species. 



Of the North American species, this new species is probably m.ost 

 closely allied to maculiventris (Norton), but the male differs in a 

 number of ways from the description given for that species, and the 

 description of the female given by MacGillivray does not agree in all 

 details with the female of the species described here. In MacGilli- 

 vray's key to the species of Itycorsia of Connecticut (Bull. 22, Conn. 

 Geol. and Nat. Hist. Survey, p. 33) this species runs to couplet 6, but 

 differs from both luteomaculata (Cresson) and alhomaculata (Cresson) 

 in the black cypeus and other minor characters. Of the European 

 species it seems to be more closely allied to stellata, but differs from 

 the descriptions of that species in the color of both adult and larva. 



Female. — Length 13 mm. Anterior margin of the clypeus trun- 

 cate; medianly the clypeus is strongly raised by the extension of the 

 antennal carina; its surface is shining, impuncate; median fovea deep, 

 elongate; area above the frontal crest with rather close, small punc- 

 tures; median ocellus in a diamond-shaped depression; posterior 

 ocellus bordered laterad and caudad by a deep furrow; posterior orbits 

 and vertex shinmg, with large widely separated punctures, frontal 

 crest obsolete; antennae 31-jointed, the third joint slightly longer 

 than the fourth and fifth combined; prescutum shining, practically 

 impunctate ; scutum shining, with a median area of close, large punc- 

 tures; scutellum shining, practically impunctate; mesepisternum 

 subopaque, with sparse, rather large, setigerous punctures. Black; 



Proceedings U. S. National Museum, Vol. 57— No. 2312. 



144.882—20— Proc.N.M.Yol..57 14 209 



