﻿AMERICAN CYNIPID GALL WASPS WELD 327 



the end of the season's growth. It is smooth, bare, green with small 

 purple spots marking the attachment of numerous radiating fibers 

 within, up to 14 mm. in diameter, rounded at distal end, slightly taper- 

 ing at attached base, the wall relatively thin (.8 mm.) (pi. IG, fig, 4, &) . 

 Larval cell ellipsoidal, 6 by 4 mm. Galls drop in late August or early 

 September and soon turn brown and become slightly wrinkled. At 

 this time the nutritive layer is all used up and full-grown larvae and 

 pupae are found inside. Some may emerge in the fall but the adults 

 described below were cut out of the galls on October 18 and November 

 5, 1949. As they are thought to be the alternating agamic generation 

 of glohus they are not given a difi'erent specific name. 



Agamic female. — ^Head and thorax black, abdomen red, tibiae and 

 tarsi brown. Cheeks broadened behind eyes. Antennae 13-seg- 

 mented. Mesoscutum rugose with parallel longitudinal ridges back 

 of anterior lines and short transverse ridges on either side of them; 

 parapsidal grooves shallow, rugose, percurrent, a median streak per- 

 current in the sculpture. Scutellum rugose, without distinct median 

 depression or posterior emargination, foveae with oblique ridges in 

 bottom. Large spot on base of radial cell covers areolet also. A short 

 median carina on propodeum. Abdomen as long as thorax, all tergites 

 normally showing on dorsal curvature, hind margin of II smooth, rest 

 punctate, VII pubescent. Ventral spine longer than hind metatarsus. 

 Mesonotum ratio 1.5; antenna 2.0; wing 4.0. Length 3.9-4.55 mm. 

 Average of three 4.3 mm. 



Genus ANDRICUS Hartig 



ANDRICUS BRUNNEUS Fullaway 



Andrictts brumieus Fullaway, Ann. Ent. Soc. Amer., vol. 4, p. 353, 1911. 



This species was described from a "thin-walled subglobular gall, 

 pointed at both ends and about the size of a pea" on the leaves of 

 Quercus douglasii. It seems to have been associated with the wrong 

 gall. The type gall in the Stanford collection, agreeing with the above 

 description but with a central cell supported by radiating fibers, 

 seems to be a gall of what, was described mider the name of Andr-icus 

 atr^mentus Kinsey. I have reared adults agreeing with the types from 

 a midrib cluster on this host at Stanford University, the type locality, 

 and also from similar galls on Quercus lohata^ Q. dumosa., and Q. garry- 

 ana. These galls are from 3-5 mm. in diameter, in a cluster of 4 to 

 6 on the under side of the leaf (pi. 17, fig. 16) , tan, slightly mottled, 

 slightly pubescent, thick walled without any radiating fibers or free 

 central cell, dropping in September. From galls collected on Quercus 

 douglasii at Stanford University on October 27, 1948, adults emerged 

 October 18 to November 5, 1949. 



