AMERICAN HYMENOPTERA. 33 



below ocelli, enclosing a black impressed dot, and continued narrowly to base 

 of clypeus, mandibles except tips, palpi, upper posterior margin of prothorai, 

 lateral margin beneath, posterior half of anterior lobe of mcsothorax, scutellum, 

 a spot on each side anteriorly, spot on postscutellum, broad oblique line on 

 pleura, tegulse, coxse except base above and beneath, remainder of the legs, 

 narrow lateral margin of abdomen above, its sides broadly beneath, and apical 

 margin of ventral segments, all white; wings hyaline, nervures and stigma 

 castaneous, second branchial cell with incomplete nervure; antennae about 

 twenty-jointed, third joint a little longer than the fourth; tarsi dusky, anterior 

 tibiae without side spur. Length .30 inch. 

 Hah. — Missouri, (0. V. Riley). 



CEPHUS Latr. 



Ceplius ruliventris.— 9 .—Shining, black, impunctured ; a pale spot at 

 base of mandibles; antennae as long as the abdomen, twenty-foui--jointed ; 

 wings hyaline, iridescent, dusky at tips, nervures and stigma fuscous; legs 

 black, anterior tibire pale in front; abdomen entirely ferruginous, sheaths of 

 ovipositor black. Length .35 inch. 

 Hah. — California, (H. ildwards). 



Ophiis abdoniinalis.— 9.— Black; sides of face, clypeus, spot at 

 summit of eyes, base of mandibles, line on cheeks, triangular spot on posterior 

 sides of prothorax above, spot beneath wings, scutellum, knees, tibise and tarsi, 

 and the abdomen above (except the fourth segment entirely and basal mart^in 

 of sixth and seventh), and sides of ventral segments more or less, all yellow; 

 antennae twenty-three to twenty-five-jointed, slightly thickened beyond the 

 fourth joint, joints 5 — 13 yellowish; wings smoky-hyaline, iridescent, costa 

 and stigma honey-yellow, second submarginal cell receives the first recurrent 

 nervure near the base, the second recurrent coincides with the second trans- 

 verso-cubital nervure, lanceolate cell with straight cross-line; legs slender, 

 apical half of posterior tibiae fuscous; abdomen nearly twice the length of 

 head and thorax, compressed, shining. Length .50 inch. 

 Hab. — Nevada, (Morrison). 



Cephiis bifasciatus.— 9.— Black, shining; spot on sides of face, spot 

 on base of mandibles, dot at summit of eyes, and band at apex of third and 

 fifth segments of abdomen above, white; antennae twenty-three-jointed, slender 

 at base, thickened beyond joint five, joints 6 — 9 more or less yellowish ; win»9 

 yellowish-hyaline, nervures fuscous, costa and stigma honey-yellow, second 

 submarginal receives the first recurrent nervure at base, the third submarginal 

 receives the second recurrent nervure near the base, lanceolate cell with straight 

 cross-line; four anterior tibiae pale at base, remainder of tibiae, the posterior 

 pair and all the tarsi fuscous; abdomen rather longer than head and thorax, 

 subcouipressed, shining. Length .45 inch. 



Hab. — Colorado, (Morrison). 



Cepliuiii lasciatus.— 9 •— Black, shining; spot on sides of face, dot 

 within summit of eyes, two spots on clypeus, dot on mandibles, spot on cheeks, 

 dot on scutellum, spot beneath wings, line on four anterior tibiae before, basal 

 third of posterior tibise, band at apex of abdominal segments two, three, five 

 and six, broad on three and five, very narrow on six, and large spot on apical 



TRANS. AMER. ENT. SOC. VIII. (5) JANI'AUV, ISSO. 



