﻿330 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



Habitat. — The type emerged April 16, 1943, from galls collected 

 at Canyonville, Oreg., October 18, 1939. One was cut out February 

 17, 1941, Two paratypes were cut out October 18, 1949, from galls 

 collected at Canyonville on October 12, 1948. Three emerged April 

 15, 1941 and April 20, 1942, from galls collected on the Mt. Wilson 

 trail above Sierra Madre, Calif., on November 4, 1939. One is from 

 Colfax, Calif. Galls were seen also at the California-Oregon State 

 line on United States Highway 199 and at San Rafael and Tdyllwild, 

 Calif. 



ANDRICUS CRENATUS, new species 



Female, — Red or amber, slightly infuscated. Head coriaceous; 

 from above transverse, vertex bare, occiput not concave, cheeks 

 broadened behind eyes; from in front as high as wide, malar space 

 one-third eye, without groove, antenna 14-segmented, infuscated dis- 

 tally. Sides of pronotum faintly striate. Mesoscutum microcoriace- 

 ous, shining, longer than wide, high arched in profile, with scattered 

 hairs, parapsidal grooves percurrent. Scutellum longer than wide, 

 sides margined, finely rugose, pubescent, the two deep smooth foveae 

 at base often infuscated. Mesopleuron largely bare, smooth. Wing 

 pubescent and ciliate, veins slender, radial cell 4.7 times as long as 

 broad, areolet almost obsolete. Claws toothed. Carinae on propo- 

 deum bent, enclosed area smooth, narrowed above. Abdomen longer 

 than head plus thorax, longer than high, all tergites usually showing 

 on dorsal margin, ventral spine slender, longer than hind metatarsus. 

 Using width of tlie head as a base the length of mesonotum ratio is 

 1.4; antenna 2.7; wing 5.1. Length 1.5-2,45 mm. Average of 24 

 specimens 1.9 mm. 



Differs from Andnc-us 'pattersonae Fullaway in its smaller size. 



7'2/P<?5.— U.S.N.M. No. 60117: Type and three paratypes. Para- 

 types also in the C.M.N.H., A.N.S.P., CA.S., and the M.C.Z. 



HostH. — Quercus dumosa and Q. douglasii. 



Gall (pi, 17, fig, 18). — ^A spangle about 4 mm. in diameter, usually 

 on the upper side of the leaf, saucer sliaped, with a thin crenate mar- 

 gin when young in August and with a prominent hump in center, 

 Wlien mature in fall there is a lens-shaped larval cavity inside, on the 

 floor of which is a thin, white, circular disk from which prominent lines 

 radiate. Galls on Quercus douglasii are less crenate. 



Habitat. — The type is from a series of dead adults cut out of galls 

 collected on Quercus dumosa at Los Gatos, Calif,, on December 13, 

 1935. Others, all from California, are from the San Bernardino 

 Mountains, San Jacinto Mountains, and Banning; other paratypes 

 emerged November 19, 1935, from galls collected at Colfax, on Quercus 

 douglasii a few days previously ; others are from Stanford University 



