188 [June 



elongate, subcylindrical, black, densely and finely punctured ; 1st seg- 

 ment convex above, smootli and polished, not much wider than the 

 peduncle ; foveae of the 2nd segment small ; apical segments gradually 

 smoother and more shining ; beneath black. Length 7 lines ; expanse 

 of wings II2 lines. 



Hah. — Pennsylvania. E. T. Cresson. 



Eesembles Isch. sublatus, and may prove to be a variety of it. 



4. Isch. Wilsoni, n. sp. 



Black; the face, scutellum, legs, and 2nd and 3rd abdominal segments yel- 

 low ; wings subhyaline. 



31ale. — Head black ; the face beneath the antennae, orbits, inter- 

 rupted behind near the summit and broad above base of mandibles, 

 clypeus, mandibles except base and apex, and the palpi, yellow ; an- 

 tennae slender, more than half the length of the body, porrect, black- 

 ish-brown above with a very narrow pale annulus in the middle, cover- 

 ing two or three joints, beneath pale fulvous, darker towards the apex ; 

 basal joint beneath yellow. Thorax black, shining, finely punctured, 

 clothed with very short, fine, pale sericeous pubescence ; tegula), a short 

 sutural line before and another beneath the wings, yellow ; scutellum 

 rather convex, polished, yellow ; metathorax black, finely punctured, 

 the elevated lines sharply defined, the central area rather small, sub- 

 quadrate, rather elongate. Wings subhyaline, slightly fuliginous ; ner- 

 vures fuscous, paler at base, stigma pale fulvous ; areolet 5-angular. 

 Legs yellow, the posterior coxae, their femora and tips of their tibi<i3 

 black ; apical joints of the tarsi often black. Abdomen elongate, sub- 

 cylindrical, shining, black; basal segment narrow, convex, smooth and 

 polished, petiole slender ; on each side of the second segment at base a 

 short longitudinal impressed line ; apical segments polished ; second 

 and third segments yellow, their extreme apical mai-gins black, some- 

 what dilated in the middle, apical half of the second segment often 

 stained with pale ferruginous. Length 5 — 6 lines ; expanse of wings 

 6^— 8A lines. 



'//f/i'.— Virginia. Dr. Thos. B. Wilson. 



5. Isch. Blandii, u. sp. 



Black ; face, orbits, broad annulus on antennra, lateral margins of thorax and 

 scutellum, apical margins of abdominal segments, and tarsi, white : metatho- 

 rax and legs in part, reddish : wings hyaline. 



3Iah'. — Head black, the fiice, orbits — broad on the cheeks, — clypeus, 



