BIOLOGICAL PAPERS. 299 



vure interstitial, the transverse median nervure in the posterior wings slightly 

 angled above the middle where it is broken by an indistinct nervure. Abdomen 

 shining, segments beyond the petiole very minutely granular, very sparsely, 

 minutely punctured; ovipositor, 4 mm', long; sheaths, 3 mm. long. Thorax and 

 head with rather abundant, somewhat appressed pubescence, metathorax es- 

 specially abundantly pubescent. Black; region where parapsidal grooves ought 

 to be brownish; face brown, the brown extending all around the eyes, the occi- 

 put and vertex black, clypeus somewhat yellowish brown, mandibles yellow, tips 

 dark brown ; superior margin of propleura, base of petiole, segments of the abdo- 

 men beyond the second largely brownish, the abdominal segments beyond the 

 second with a large black dorsal spot ; legs brown to brownish testaceous, poste- 

 rior coxa3 blackish within ; base of wings yellow: ovipositor brown, apical third 

 brownish testaceous. 



Male.— Length, 6 mm. Very much like the female ; mandibles and propleura 

 brownish, abdomen almost entirely brown; transverse median nervure in poste- 

 rior wings broken below the middle in the same way as the transverse median 

 nervure is broken in the posterior wing of the female. Antenna> thirty-three 

 jointed. 



Types: University of Kansas. Type localities: Female from Morton county, 

 Kansas, 3200 feet; June, 1902, F. H. Snow. Male from Sedgwick county, near 

 Wichita, Kan., in vineyard; September, 1895, E. S. Tucker. 



Pristomerus appalachianus var. dorsocastaneus, n. var. 



Similar to the preceding, but differs as follows: Head more brown, propleura 

 entirely brown, dorsulum almost entirely brown, the male with a black spot ad- 

 joining the anterior margin of the dorsulum, stigma very dark brown, pale yel- 

 lowish brown at base; transverse median nervure in posterior wings of the male 

 broken as in the female which has it broken as in the female of typical appala- 

 chianus. 



Types: University of Kansas. Type locality, male and female: Douglas 

 county, Kansas. August, E. S. Tucker. 



Thersilochus snowi, n. sp. 



Related to hyalinipennis, but smaller and with a distinctly different sculpture 

 and structure of the metanotum, etc. 



Female. — Length, 9 mm. Head polished, distinctly punctured, the punctures 

 rather closely arranged, sparse along the eye margin and in the middle of the 

 face; clypeus distinctly convex, more regularly punctured than the face; the 

 cheeks sharply margined ; antenna? twenty-seven jointed. Thorax shining; dor- 

 sulum more coarsely punctured than the face, the parapsidal grooves replaced 

 by broad shallow depressions that extend about half-way back on the dorsulum, 

 the depressed portion almost rugosopunctate; scutellum not so coarsely, more 

 closely punctured than the dorsulum; propleura rather sparsely punctured; me- 

 Bopleura with a sharp margin anteriorly continuous with the mesosternal margin, 

 more regularly and closely punctured than the propleura and with an oblique shal- 

 low channel that is striate with a smooth superior edge, anterior to this oblique 

 channel is a curved channel extending from the upper portion of the anterior 

 ridge back under the insertion of the wings; metathorax completely areolated, the 

 basal area small quadrate, the areola horse-hoof shaped, slightly angulated an- 

 teriorly and laterally, the posterior margin strongly curved in, almost arcuate, 

 areola distinctly punctured, the punctures nearly adjoining, lateral carina? of the 

 petiolarea angulated below the middle, the petiolarea with large, almost adjoin- 

 ing punctures, and somewhat striate, the stria^ apparent only along the lateral 



