50 PROCEEDINGS OF THE NATIONAL MUSEUM vor.. G8 



Springs, Los Gatos, Palo Alto, and St. Helena; on Q. rclsUzenii at 

 Camp Baldy, Bagby, California Redwood Park, and Ukiali (adults 

 out May 10-13, 1922). 



TRIGONASPIS CUPELLA. new species 



■ Agamic female. — Black. Head coriaceous; from above massive, 

 twice as broad as long, cheeks broadened behind eyes, occiput con- 

 cave ; from in front elliptical in outline, width to height as 36 : 30, 

 interocular space .58 transfacial and area 1.2 times as broad as 

 high, malar space one-fourth eye with a slight groove, antenna 13- 

 segmented, lengths as (scape) 12 (width 5) : 8(5) : 14(3.5) : 13 : 9 : 9 : 8 : 

 8 : 7.5 : 7.5 : 7 : 6 : 10(4) last sometimes subdivided, flagellum gradually 

 stouter to tip, faint median carina below median ocellus, broad low 

 median ridge antennae to clypeus. Mesonotum nearly flat, as broad 

 as long, without grooves or lines or transverse groove or suture be- 

 tween mesoscutum and scutellum, the disk with a few setigerous 

 punctures. Carinae on propodeum diverging below around on to 

 the sides of neck, spiracular areas pubescent. No trace of wrings. 

 Hind tarsus shorter than tibia, its segments as 16:7:4:3:8, claws 

 with an obscure tooth at base. Abdomen longer than head and 

 thorax, length to height to width as 78 : 61 : 20, lengths of tergites 

 measured along dorsal curvature as 46 : 19 : 8 : 14 : 10 : 8, second bare at 

 base, dorsal margin behind second loiife-edged, ventral spine slender, 

 six times as long as broad in side view. Using width of head as a 

 base the length of mesonotum ratio is .57, antenna 2.3, ovipositor 4.3. 

 Length, 1.3-2.0 mm. Average of 100 measured specimens, 1.58 mm. 



T^jpe.—Gvit. No. 27199, U.S.N.M. Type and 39 paratypes. 

 Paratypes at American Museum, Field, Stanford, Harvard, and 

 Philadelphia Academy. 



Host. — Quercus grisea^ undulata., arizonica. 



Gall (fig. 39). — A small black tup-shaped spangle scattered on 

 upper and under surface of leaf in the fall and dropping with the 

 leaf. From one to a dozen on a leaf. Galls measure up to 2.6 mm. 

 in diameter and 2 mm. high, the exit hole in the shallow cu}) at ajwx, 

 the mouth of the cup hometimes slightly constricted by the inrolled 

 edges of the tliick wall, the larval cell lying transversely at base 

 of gall. 



Ilahitat. — The type is selected from material on Quercus grisea 

 from Magdalena, N. Mex., Avhere the galls were \ery common in 

 .November 1921. Paratypes are from galls on Q. unduJata at 

 Tijeras in the Sandia Mountains. Flies emerged from both lots 

 of galls from January 24 to February 6, 1922. Other paratypes 

 are from Q. arizonica from the Mule mountains and from Oracle 

 in the Santa Catalina Mountains, Ariz. Galls were observed on 



