NO. 2136. REVISION OF THE GENUS APHYCU8TIMBERLAKE. 617 

 21. APHYCUS RUSTI, new species. 



Female. Front and vertex about twice as long as wide; ocelli in 

 an acute-angled triangle, the posterior pair about one-half their own 

 diameter from the eye margin; eyes almost without pubescence. 

 Antennal scape about one-third as wide as long, widest across the 

 middle; pedicel as long as the first three funicle joints combined; 

 funicle joints all wider than long, increasing gradually in width so 

 that the sixth is about twice as wide as the first, the first four of equal 

 length, the last two about one-fourth longer than the preceding; 

 club oval, obtusely rounded at apex, about one-fourth wider than 

 the preceding joint and as long as the last four funicle joints com- 

 bined. Wings uniformly ciliated; oblique hairless streak widened 

 below and extending nearly to the posterior margin of disk, with a 

 barely cut-off portion connecting with a branch of the basal hairless 

 streak. Ovipositor protruded slightly, or about one-tenth the length 

 of abdomen. Length, 1.2 to 1.3 mm. 



Front, vertex, and mesonotum rather deep orange yellow; rest of 

 the head and body nearly uniformly pale sulphur yellow; concealed 

 part of the pronotum hardly with a trace of blackish in type, but 

 with a blackish band in the three paratypes; dorsum of abdomen with 

 a basal, inconspicuous pale brownish cross band. Antennal scape 

 black with base, apex, and line on dorsal margin yellowish white; 

 pedicel brown with the lower side except at base whitish; first four 

 funicle joints brown, the last two yellowish white; club blackish 

 brown. Legs uniformly pale yellowish, with the last joint of the 

 tarsi tipped with blackish. Wings hyaline, the veins pale yellowish. 



Male. Front and vertex somewhat less than twice as long as wide; 

 ocelli in an equilateral triangle, the posterior pair about one- third 

 their own diameter from the eye margin. Antenna much as in female, 

 but scape narrower, varying from a little less than one-third to one- 

 fourth as wide as long; pedicel a little shorter, about equal to the 

 first two funicle joints and one-half of the third combined; club 

 smaller, tapering from the base to the rounded apex, no wider than 

 the preceding joint and as long as the last three funicle joints com- 

 bined. Wings as in female. Length, 0.8 to 1.2 mm. 



Coloration nearly as in the female, the concealed part of the 

 pronotum blackish and the dorsum of abdomen nearly uniformly pale 

 yellow. Antennal scape colored as in female, but the flagellum 

 nearly uniformly pale brownish, the underside of the pedicel paler 

 or yellowish. Legs and wings as in the female. 



Described from four females, six males (type, allotype, and para- 

 types a to Ji) reared from Pulvinaria species on sweet potato, Sullana, 

 Piura, Peru, February 23 to March 6, 1912 (E. W. Rust), all mounted 

 in balsam. Received from Messrs. C. H. T. Townsend and E. W. 



