ART. 23 REVISION OF MACKOCENTEUS MUESEBECK 47 



to apex ; propodeum mostly delicately and more or less transversely 

 sculptured, smooth at base; sides of pronotum and pleura polished; 

 radius arising from much beyond middle of stigma, the first abscissa 

 of radius perpendicular to anterior margin of wing, or only very 

 slightly oblique; first discoidal cell longer than first cubital; sub- 

 median cell weakly hairy, usually with a hairless area apically; 

 nervulus usually postfurcal by its own length, or very nearly ; medi- 

 ella fully twice the lower abscissa of basella, the latter usually a little 

 longer than nervellus. Abdomen with first, second, and more or less 

 of third, tergites closely longitudinally aciculate; the first convex 

 at base, not impressed in front of the spiracles, the latter near end 

 of basal third and usually distinctly farther from base of tergite 

 than from each other; spiracles not very prominent; ovipositor 

 sheaths distinctly a little longer than the body. 



Yellow; sometimes completely yellow, but most frequently with 

 more or less of dorsum of thorax and abdomen varied with black; 

 in the darkest specimens mesonotal lobes, scutellum, metanotum, and 

 propodeum piceous to blackish with the abdomen entirely blackish 

 except at apex; head always yellow; palpi pale yellow, antennae 

 yellowish, basal flagellar segments sometimes darker; legs yellow; 

 wings hyaline, stigma always entirely yellow, veins yellowish to 

 brown. 



The following material, in addition to the type, has been ex- 

 amined: At the United States National Museum, two paratypes 

 from Texas and a large number of specimens from numerous locali- 

 ties ranging from Pennsylvania to Florida and Texas, and includ- 

 ing material reared from Laspeyresia molesta Busck, Pyrausta 

 nubildlis Hiibner, Rhofobota vacciniawi Packard, Garpocapsa yomo- 

 nella Linnaeus, Epibleina tripartitana Zeller, E. strenuana Walker, 

 Aristotelia dbsconditella Walker, Euzophera ostricolorella Hulst, 

 Proteopteryx holliana Slingerland, and Tetralopha subcanalis 

 Walker; many specimens reared from Laspeyresia molesta and 

 Epibleina strenuana taken in New Jersey, Tennessee, and Ohio, 

 which were sent me for study by H. W. Allen, in charge of the 

 oriental fruit moth investigations, at Moorestown, N. J.; a series 

 from the European Corn Borer Laboratory, at Monroe, Mich., 

 reared from Papaipeina nehris Guenee, taken in Ohio ; several hun- 

 dred specimens reared by H. G. Butler, of the Bureau of Ento- 

 mology, from L. molesta at Harrison, Tenn. ; a series from the same 

 host reared by J. O. Pepper at Chambersburg, Pa.; one specimen 

 from Cohasset, Mass., in the collection of the Boston Society of 

 Natural History, and 14 specimens at the gipsy moth laboratory 

 reared from Episimus argutanus Clemens, taken at Revere and 

 Roxbury, Mass. 



