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
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