PROC. ENT. SOC. WASH., VOL. 70, NO. 2, JUNE, 1968 101 THE NEARCTIC DORYCTINAE, VI. THE GENERA ACROPHASMUS, GLYPTOCOLASTES, DORYCTINUS, AND A NEW GENUS, STENOCORSE ( H YMENOPTERA : BrACONIDAE ) Paul M. Marsh, Systematic Entomology Laboratory, Entomology Research Division, Agr. Res. Ser., USDA^ The present paper deals with four genera of the Doryctinae in which the head is narrow behind the eyes and somewhat transverse. This shape of the head differs from that of the typical Doryctinae, as ex-emplified by Doryctes, and has influenced past workers to place these genera in several other supergeneric groups (see discussion in Marsh 1965 ) . The species described below in Acrophasmus represent the first records of this genus for the Nearctic Region. Acrophasmus Enderlein Acrophasmus Enderlein, 1912, p. 16. Type-species: A. exilis Enderlein. Monotypic and original designation. Head transverse or subcubical, temples narrow; first flagellar segment longer than second; forewing (fig. 1) with 3 cubital cells; recurrent vein entering apex of first cubital cell; first brachial cell closed at apex; subdiscoideus leaving first brachial cell below middle of apical end; first segment of mediella short, one-fourth or one-fifth as long as second segment; hindwing of male with a stigma; foretibiae with a row of 5-12 stout spines on anterior edge; tergum (2 + 3) (fig. 4) with a transverse arcuate furrow behind middle and often with a second transverse furrow behind this curved in opposite direction; digitus of male genitalia usually with a tooth on inner side (fig. 6). The sculpturing of tergum (2-f-3), with its transverse grooves rather than oblique basal grooves, and the short first segment of the mediella in the hindwing will distinguish Acrophasmus from the other genera in this group. This genus has been previously recorded only from the Neotropical Region. One described species, secundus (Muesebeck and Walkley), and several new species described below were placed in the genus Donjctinus in the collection of the U. S. National Museum but are congeneric with Acrophasmus. Key to Nearctic Species of Acrophasmus 1. Length of first abdominal tergum usually equal to apical width, at most slightly longer, but then abdominal terga beyond (2 + 3) smooth; female antenna 26-segmented or less 2 Length of first abdominal tergum at least 1.5 times longer than apical width; abdominal terga beyond (2 + 3) sculptured; female antenna 27-segmented or more 3 ^ Mail address: c/o U. S. National Museum, Washington, D. C. 20560.