ART. 10 GALL-INHABITING CYNIPID WASPS WELD 93 



covered with short white pubescence, except on vertex, finely rugose, 

 from above as broad as thorax and broadened behind the eyes, malar 

 space .5 eye, antennae 14-segmented, lengths as (scape) 15 (width 

 T) :0:20(i5) : 15 : 13 : 12: 10.5 : 10: 10: 9 : 8 : 8: 8 : 13.5(7). Pro- and 

 mesonotum rugose, the white pubescence not quite hiding the sculp- 

 ture. Parapsidal grooves narrow, percurrent, between them ])os- 

 teriorly several longitudinal ridges in the sculpture, but no distinct 

 median ; anterior and parallel lines inconspicuous ; foveae deep, large, 

 and distinctly separated, the septum breaking up into fine ridges 

 running out on to disk. Carinae on propodeum nearly straight, con- 

 verging slightly above. Mesopleura striate below, with small shining 

 spot above. Wing subhyaline, pubescent, and ciliate; veins brown, 

 the two cross-veins heavy; second abscissa of radius slightly 

 angled; radial cell three and one-fourth times as long as broad; 

 areolet nearly round, reaching one-eighth way to basal; cubi- 

 tus reaching basal. Hind tarsus 5 shorter than 1, claws simple. 

 Abdomen slightly longer than head and thorax, length to height to 

 width as 35 : 28 : 20 ; lengths of tergites along dorsal margin as 

 26:6:3:2:1:4, second with two large pubescent patches at base ; 

 exposed parts of 3-7 punctate, seventh pubescent; ventral valves 

 projecting posteriorly; tip of ovipositor hooked: ventral spine 

 slender, six times as long as broad in side view, with scattered hairs 

 beloAv. Using width of head as a base, the length of mesonotum 

 ratio is 1.4, antenna 2.4, wing 4.2. Length of the single specimen, 

 3.3 mm. 



Tf/pe.— Cat No. 27220, U.S.N.M. Holotype. 



Host. — Quercus maxima^ red oak. 



Gall (fig. 24).— The gall was described by Miss Stebbins in 1010.^ 

 but she failed to rear the adult. The galls are spindle-shaped with 

 a long tapering base, the largest measuring 31 mm. long by 4 mm 

 in diameter, longitudinally ridged with from 9-12 rounded ridges. 

 They are found in late summer sticking out at an angle of 45° on 

 the twigs, produced from weak lateral buds toward the base of the 

 current season's growth, greenish at first and often tinged with red, 

 later turning brown and dropping to ground eariy in September. 



Hahitat. — The type material was collected at Ravinia, III., Sep- 

 tember 15, 1917. Galls were opened at intervals and on September 

 2 and March 25, i919, those opened contained full-grown larvae. 

 On June 9, 1919, the dead adult was found in the last of the galls 

 in the cage. Date of normal emergence unknown. These galls 

 were also collected at Evanston, Fort Sheridan, and Glen Ellyn, 

 111. William Beutenmueller has collected them at New York City. 

 There is a similar gall on Q. texana at Boerne, Tex. 



< Spiiiigflokl Mus. Nat. Hist. Bull. 2, p. 23, pi. 9, fig. 34. 



