No. 2320. TRIBE ACOENITINI—CUSHMAN AND ROHWEB. 513 



tate; clypeus rather sharply inflexed, the median tooth broad and 

 obtuse; malar space three-fourths as long as basal width of mandible; 

 face two- thirds as long as wide; frons deeply concave, arcuately 

 rugose; temples convex, rather sharply sloping; diameter of lateral 

 ocellus slightly shorter than postoceUar line and two-thirds as long 

 as ocell-ocular line. Thorax coriaceous, the sculpture a mixture of 

 irregidar rugosity and punctuation; propodeum much shorter than 

 height of combined propodeimi and metapleura, carinae rather strong, 

 petiolar area rather long, spiracle long oval. Abdomen three- 

 fourths longer than head and thorax combined; first tergite hardly 

 haK as wide as long, about a third longer than second; hypopygidium 

 about half as long as abdomen. 



Rufous; face uniformly slightly paler; mandibles and clypeal 

 tooth piceous; occiput, frons, vortex, and superior orbits black 

 antennae blackish, scape, pedicel, and first flagellar joint red beneath 

 scutellum and tegulae slightly more yellowish; legs testaceous, tarsi 

 and front and middle tibiae yellowish; wings dark brownish with 

 purple reflections; membraneous portion of tergites dark brown; 

 ovipositor sheaths black. 



Type locality. — Tuolumne County, California. 



Type.— Cut. No. 21194, U.S.N.M. 



One female collected by D. W. Coquillet. 



COLEOCENTRUS RUFUS Prorancher. 



Coleocentrus rufus Provancher, Nat. Can., vol. 8, 1876, p. 316, female. Type — 

 Prov. 1877 coll.. Public Museum, Quebec; yellow label 456. 



One female in the United States National Museum agrees per- 

 fectly with Provancher's description, and Mr. Rohwer, who has seen 

 the type, is of the opinion that the determination is correct. 



Related to pulcliripennis Cushman, differing principally as follows : 

 Head polished, impunctate; frons very shallowly concave, rugosity 

 weak; temples strongly convex, broad, and weakly sloping; diameter 

 of lateral ocellus equal to postocellar line and fully three-fourths as 

 long as ocellocular line; propodeal carinae sharp; spiracle nearly roimd; 

 first tergite much more than half as wide as long, nearly a half longer 

 than second; ovipositor much shorter, the measurements being — 

 body, 20 mm.; ovipositor, 12 mm. 



Colored like pulchripennis except as follows: Face yellow with a 

 median oval red spot; clypeus reddish at base, yellowish at apex, 

 the tooth red; mandibles piceous only at apex; cheeks piceous; black 

 of top of head confined to frontal spot from ocelli to antennae, occiput 

 and posterior portion of vertex and upper orbits, space between 

 ocelli red; thoracic sutures and extreme base of first tergite black; 

 tegulae distinctly yellow; front and middle knees pale; hind tibiae 



144382— 20— Proc.N.M.vol.57 33 



