NO. 1986. NEW PARASITIC HYMENOPTERA—ROHWER. 357 



in outline, two and one-hall times as long as its greatest width which 

 occurs basad of the middle, posteriorly the areola sUghtly converges ; 

 basal area trapezoidal in outline, about twice as wide basally as 

 apically ; posterior lateral angles of the propodeum strongly dentate ; 

 first abdominal segment transversely striate, with two complete 

 longitudinal nearly parallel carinae; second, third, fourth, and fifth 

 abdominal segments coarsely, irregularly reticulato-granular, the 

 apical segments shining, finely aciculate; transverse median of the 

 fore wings beyond the basal vein. Black, variegated with white; the 

 following parts white: clypeus, face except a small median spot, inner 

 orbits above the antennae, scape beneath, posterior orbits, spot on 

 dorsal and ventral margins of the pronotum, prepectus above, tegulas, 

 metapleurae, scutellum, metanotum, apex of the propodeum, sides of 

 the dorsal lateral apical margin of the abdominal segments ; the four 

 anterior legs rufous, coxae beneath white; posterior legs, except the 

 trochanters and base of the tibiae which are white, black to piceous 

 on the tarsi; wings hyaline; venation dark brown. 



Clark Station, Missouri (near St. Louis). Described from one male 

 collected by A. D. Hopkins and recorded under the Bureau of Ento- 

 mology No. Hopk. U. S. 2848e. 



Type.— Cat. No. 15369, U.S.N.M. 



XYLONOMUS (MAEROPHORA) PICEATUS, new species. 

 Xylonomus stigmapterus Say, Howard, Insect Book, 1904, pi. 9, fig. 2. 



This species is related to Jiumeralis Say, but may be separated from 

 it by the dark ferruginous color, and the different proportions of the 

 sides of the areolation of the propodeum. 



Female. — Length to the apex of the abdomen 17 mm., length of 

 the ovipositor 15 mm. Face irregularly reticulate; a strong carina 

 projecting between the bases of the antenna; the area between the 

 ocelli and the antennae closely, distinctly punctured; dorsad and 

 ventrad of the anterior ocellus is a deep furrow; postocellar line 

 about two and one-half times as long as the ocellocular line; posterior 

 orbits strongly striate; pronotum densely punctured, with the dorsal 

 lateral angles strongly, sharply tuberculate; prescutum long, well 

 defined, with a shallow median depression, anteriorly densely (some 

 places confluently) punctured, posteriorly transversely striate; scutum 

 strongly punctured, anteriorly the punctures are confluent so there 

 is a transverse striation; mesepisternum with close punctures; propo- 

 deum closely punctato-reticulate; basal area triangular in outline, 

 separated from the areola by a longitudinal carina; areola heptagonal 

 in outline, with sides of the areola one-fourth shorter than the ante- 

 rior carina; propodeum not dentate laterally; first three abdominal 

 segments coarsely reticulate, the following finely reticulate; first 

 abdominal segment longitudinally depressed basally, slightly dentate 



