10 E. T. CRESSON. 



NeniatilS dorsivittatus.— 9.— Pale greenish- white; head tinged with 

 yellow, face white; large spot on vertex, covering the ocelli, extreme tips of 

 mandibles, antennae, mesothorax except sides of middle lobe, most of scutel- 

 lum, metathorax, and stripe down the middle of the abdomen above, broad 

 at base and gradually narrowed to apex, black; antennae three- fourths the 

 length of the body, slender, three basal joints of flagellum very long and of 

 equal length; wings hyaline, iridescent, nervures black, costal nerve and 

 stigma pale luteous, second submarginal cell receiving the first recurrent 

 nervure about one-fourth from the base, and the second about one-eighth from 

 the tip, third submarginal half the length of the second, nearly square; tips of 

 posterior tibiae dusky, the tarsi more or less blackish. Length .25 inch. 



Hab. — Nevada, (Morrison). 



Nematus stiadus. — 9 • — Honey-yellow, shining ; spot within ocelli, tips 

 of mandibles, antennae, broad stripe on middle lobe of mesothorax, narrower 

 one on each lateral lobe, spot before each middle coxa, postscutellum, line 

 behind, and disk of abdomen above except narrow apical margin of the seg- 

 ments, black; antennae two-thirds the length of the body, three basal joints 

 of flagellum of nearly equal length; wings hyaline, faintly yellowish towards 

 base, nervures fuscous, costal nerve and stigma luteous, second submarginal 

 cell receiving the first recurrent nervure about one-third from the base, the 

 second coinciding with the second transverso-median nervure, third sub- 

 marginal cell more than half the length of second; extreme tips of posterior 

 tibiae and the tarsi more or less, fuscous; abdomen broad-ovate, subdepressed. 

 Length .25 inch. 



Hab. — White Mountains, N. H., (Morrison). 



Neniatus inelliiius. — 9. — Honey-yellow; a spot between ocelli, some- 

 times wanting, spot behind ocelli, tips of mandibles, antennae, spot or line on 

 lateral lobes of mesothorax, extreme tip of scutellum, and the metathorax 

 above, black; antennae about half the length of the body, slender, the three 

 basal joints of flagellum of nearly equal length; wings hyaline, iridescent, 

 faintly tinged with yellowish, nervures black, costal nerves and stigma honey- 

 yellow, second submarginal cell receiving the first recurrent nervure about 

 one-fourth from the base and the second about one-sixth from the tip, third 

 submarginal more than half the length of second, longer than broad and 

 widened to tip; tarsi more or less dusky; abdomen robust, about as long as 

 head and thorax. Length .23 inch. 

 Hub. — Nevada, (Morrison). 



AUIiACOMERVS Spin. 



Anlaconierus ? ebeuus.— 9 .—Black, shining ; labrum, base of mandi- 

 bles, palpi, posterior angles of prothorax, tegulae, and legs except base of coxae, 

 of femora and the tarsi more or less, dull yellowish-white; clypeus slightly 

 notched at tip; antennae about half the length of the body, slender towards 

 tip, nine-jointed, three basal joints of flagellum of nearly equal length; wings 

 hyaline, nervures fuscous, costal nerve and stigma pale honey-yellow; one 

 marginal, and four submarginal cells, the first submarginal small, quadrate, 

 the second about three times longer than the first, receiving the first recurrent 

 nervure less than one-third from base, third submarginal about half the length 



