1864.] 189 



mandibles and palpi, white ; antennfe nearly as long as the body, por- 

 rect. black, the 15th to 24th joints entirely, and the outer sides of the 

 four following joints, white. Thorax black, finely punctured; sides of 

 the pleura and most of the metathorax rufo-fulvous ; a line on the col- 

 lar extending down on each side, tegulfe, a sutural line before and a 

 short one beneath the wings, two short dorsal lines, and a large patch 

 on the pleura in front and beneath, white : scutellum rather flat, pol- 

 ished, black, the lateral and apical margins, the outer sides of the ca- 

 rina on each side of the scutellum in front, and the postscutellum, 

 white ; metathorax finely punctured, rufo-fulvous, the anterior portion 

 above and a quadrate mark behind, blackish, the elevated lines well 

 defined, the posterior ones yellowish, the central area rather large, 

 subelongate. Wings hyaline, apical margins faintly smoky ; nervui'es 

 fuscous, the stigma paler; areolet subtriangular. Legs rufo-fulvous, 

 the 4 anterior coxjb, the trochanters, anterior tibiae in front and all the 

 tarsi, more or less white ; posterior tibiae and tarsal claws, black. Ab- 

 domen elongate, subcylindrical, black, minutely punctured, shining ; 

 basal segment slightly dilated, subconvex, its sides, as well as most of 

 the petiole, fulvous; basal foveas of second segment small, and deep; 

 apical margins of the first six segments and the whole of the seventh, 

 except two black dots, white, the band on the third segment inter- 

 rupted in the middle. Length 5 lines ; expanse of wings 8 lines. 

 Hah. — Pennsylvania. Mr. Jas. H. B. Bland. 



6. Isch. vinnulus, n. sp. 



Black ; anteniiiB with a yellowish annulus ; face, orbits, lateral margins of 

 mesothorax, a spot on its disk, tegulse, most of pectus, scutellum, an ill defined 

 W on metathorax and the coxse, whitish ; part of the 3rd, -Ith and 5th, and all 

 of the remaining segments of the abdomen, and the femora, fulvous ; wings 

 hyaline. 



Male. — Head black, the face, clypeus, mandibles, orbits, broad on 

 the cheeks, and the palpi, white ; antennae porrect, three-fourths as 

 long as the body, black above, brown beneath, the 16th to 24th joints 

 yellowish, the basal joint beneath whitish. Thorax black, shining, 

 feebly punctured, a quadrate spot on the disk of the mesothorax, the 

 tegultie, a sutural line before and a short line beneath the fore-wings, 

 extending down the suture and meeting the large spot which covers 

 the pleura beneath, a line above the anterior coxse, a spot beneath the 

 hind wings and an angular line immediately behind it, all whitish ; 



