AMERICAN HYMENOPTERA. 11 



of second, longer than broad, widened at tip and receiving the second recur- 

 rent nervure near the base; lanceolate cell petiolated as in Nematus ; under 

 wing with two middle cells; abdomen broad-ovate, depressed, extreme apex 

 above and apex of venter more or less pale. Length .30 inch. 

 Hah. — Colorado, (Morrison). 



EMPHYTUS Leach. 



Empliytns improbus.— J.— Black, shining; clypeus, lahrum, upper 

 posterior margin of prothorax, outer margin of tegul8e,tip8 of anterior femora, 

 their tibiae within, and base of four posterior tibiae, white; antennae brown at 

 apex, about half the length of the body, third, fourth and fiftli joints of nearly 

 equal length; wings smoky-hyaline, nervures and stigma black, lanceolate 

 cell with oblique cross-line, under wings with one middle cell; first tarsal 

 joint not as long as all the remainder; abdomen about as long as head and 

 thorax, subcompressed at tip, sides of dorsal segments with a more or less 

 obscure pale spot, sometimes quite indistinct. Length .25 inch. 



%. — More slender than 9 and with longer, stouter antennae; abdomen 

 narrow, depressed; otherwise as in 9- Length .22 inch. 



Hah. — Nevada, (Morrison). Closely allied to macidatus Norton. 



DOLERUS Leach. 



Dolerns coloradensis.— 9.— Fulvo- ferruginous; head, antennae, scu- 

 tellum, spot behind, metathorax laterally, posterior margin of pleura laterally, 

 the under surface of pleura more or less, and the legs, black; head rugulose, 

 clypeus deeply emarginate at tip, sometimes more or less ferruginous; thorax 

 above sparsely punctured, pleura rugulose at sides, smooth and shining be- 

 neath; wings pale fusco-hyaline; abdomen shining. Length .45 inch. 



Hab. — Colorado, (Morrison), Closely allied to tejonensis Norton. 



DINEURA Dahlb. 

 Dinenra luteipes. — 'J,.— Shining black; antennae three-fourths the 

 length of the body, third joint shorter than the fourth, fourth and fifth sub- 

 equal ; wings hyaline, iridescent, nervures brown, costal nerve and stigma dull 

 luteous, marginal cross nervure received beyond middle of third submarginal 

 cell which is longer- than broad, second submarginal cell receiving the first 

 recurrent nervure near the base and the second near the tip; legs dull luteous, 

 coxae, trochanters and base of femora black, tips of tarsi dusky ; apex of venter 

 rufo-testaceous. Length .20 inch. 

 ira6.— Maine, (C. H. Fernald). 



MESON EITR4 Hartig. 

 Ulesoneura albipes.— J.— Black, shining; clypeus deeply emarginate, 

 labrum piceous, palpi pale, antennae slender, rather longer than head and 

 thorax, joints 3 — 5 subequal; upper corners of prothorax, tegulae and legs 

 luteous; wings hyaline, iridescent, nervures brown, stigma luteous, marginal 

 cross nervure straight, received in middle of third submarginal cell which is 

 about twice longer than wide; tarsi more or less dusky; abdomen broad ovate, 

 depressed, extreme sides and apex, and venter mostly, yellow-luteous. Length 

 .25 inch. 



Hah. — Nevada, (Morrison). 



