BIOLOGICAL PAPERS. 267 



half and a V-ehaped raised line at apex; wings slightly brownish; nervures pale 

 brown, stigma dark brown; second eubmarginal cell quadrangular, nearly as 

 long on the radius as the first abscissa of the radius and the first transverse 

 cubitus combined, the transverse median nervure is a little further removed 

 from the basal nervures thac the first transverse cubitus from the stigma. Ab- 

 domen shining, the first three segments longitudinally regulose, the first and 

 second segments have a distinct median raised line, on the third segment this 

 line is indistinct and not prolonged beyond the middle, the apical half of the 

 third segment is sparsely punctured and without striie, beyond the third seg- 

 ment the segments are smooth and polished. Dull yellowish red; the face, pro- 

 thorax and dorsum of thorax in greater part ferruginous; space between ocelli, 

 terminal tarsal joints, apex of posterior femora and tibiic, mesopleura, mesoster- 

 num and part of basal half of metapleura and apex of abdomen black. Pubes- 

 cence short and faintly yellowish. 



Type: University of Kansas. Type locality: Douglas county, Kansas, 900 

 feet. F. H. Snow. One specimen. 



Rhogas melanothorax, n. sp. 



Females — Length, 2 mm. Head polished, face dull, minutely punctured 

 cheeks with a distinct margin, scape broader than the pedicellum, twice as long. 

 Flagellum destroyed. Thorax polished, parapsidal grooves on the anterior half 

 of the dorsulum but not deeply impressed; metanotum unevenly sculptured, 

 rather rugulose, anteriorly in the middle with a longitudinal raised line that termi- 

 nates posteriorly in a smooth narrow space; wings pale hyaline, nervures and stigma 

 brown, first transverse nervure longer than the second abcissa of the radius, the 

 second submarginal cell rhomboidal. Abdomen shining and polished, the first 

 two segments finely striate without a disticct median longitudinal raised line, 

 the remaining abdominal segments smooth and polished. Black; flagellum, 

 pedicellum and legs testaceous to brownish testaceous, posterior tibiae and tarsi 

 brown, ovipositor testaceous. Covered with a fine silvery pubescence which is 

 nowhere very abundant. 



Type: University of Kansas. Type locality : Douglas county, Kansas. One 

 specimen; August, E. S. Tucker. 



Heterogamus graphicus Cresson. 



Clark county, Kansas, 1962 feet; June, F. H. Snow. 

 Lytopylus azygos, n. sp. 



Feimale — Length, 5 mm. Head polished and smooth, the occiput sparsely 

 punctured, face with rather indistinct minute punctures, elevated along the 

 middle line, almost forming a keel; scape rather clavate, polished, the flagellum 

 dull. Antennae broken. Thorax polished, the parapsidal grooves represented by 

 a dent in the middle of the posterior half of the dorsulum; metanotum regulose 

 in the middle, the metapleura minutely punctured; wings with the first abcissa 

 of the cubitus represented by a short stump, submedian cell distinctly longer 

 than the median cell in the anterior wings, first submarginal cell triangular; 

 nervures very dark brown, the membrane brownish. Abdomen polished, smooth, 

 basal half of the basal segment impressed ; ovipositor about as long as the met- 

 athorax and abdomen combined. Red ; head, antennte, pectus, coxse, trochanters, 

 four anterior femora except at tip and the sheaths of the ovipositor black ; 

 tibise more or less dark brown ; ovipositor brown. Covered with a short silvery 

 pubescence which in no place is so close as to obscure the tegument. 



Type: University of Kansas. Type locality: Morton county, Kansas. 3200 

 feet; June, 1902, F. H. Snow. One specimen. 



