1919] Hall — New Tryphonina of the Tribe Ctenoipelinini 159 



Scopiorus plagosus sp. no v. 



9 . Length 4 mm. Head as wide as thorax, shghtly protuber- 

 ant beneath antennae. Distance from eye to eye about equal to 

 distance from clypeus to ocellus. Malar line two-thirds the basal 

 width of mandible. Clypeus rather flat, but separated from face 

 by groove. Antennae extending to middle of abdomen, with 24 

 segments; 4-12 thickened; length of first flagellar joint four times 

 its apical width and more than that of scape and pedicel; next 

 joint three times as long as wide and 11th segment twice as long as 

 wide. Parapsidal furrows indicated anteriorly. Basal transverse 

 carinse wanted on propodeum. Scutellum flat, triangular, and 

 margined. Abdomen sessile, petiole one-fourth wider at apex than 

 at base; third segment slightly wider than thorax. Carinse of 

 petiole extending to rugulose transverse groove near apex. Trans- 

 verse groove on second segment clearer laterally. Claws thickly 

 pectinate. Ovipositor curved. Areolet wanting. Humeral cross 

 nervure of hind wings broken below middle. Face finely punc- 

 tured; cheeks sparsely so; thorax coarsely so, except pronotum; 

 first two segments of abdomen rugulose. 



Black. Yellow-rufous as follows: base and apex of second and 

 third segments, legs with the following exceptions which are black; 

 claws, posterior coxae, bases of other coxae, hind femora (except 

 apex) and outside of four front femora. Scape, mandibles except 

 teeth, clypeus, face except clypeal suture and band from antennae 

 to clypeus, narrow line on apex of segments, 3, 4, and 5, yellow; 

 tegulae and bases of veins, white. 



Female from Yellowstone Pa-rk, Continental Divide, 8200 ft., 

 collected by Prof. A. L. Melander, August 8, 1919. 



This is nearest to Scopiorus expansus Davis. 



