Kinsey: Studies of Cynipidx 



107 



the adults of the first two varieties there are few differences, 

 but their galls are very distinctive; between the galls of the 

 second and third varieties there are not appreciable differ- 

 ences, but their adults are very distinct. In the first instance 

 the species varies more physiologically than morphologically, 

 in the second instance the morphology varies more than does 

 the physiology. 



Plagiotrichus asymmetricus variety asymmetricus, new variety 



FEMALE. — Closely resembles the female of the following variety; 

 head light rufous brown, rather coarsely coriaceous, distinctly rugose on 

 the face; antennae dark brown, yellow rufous basally; mesonotum brown- 

 ish yellow or light rufous brown, in part dark brown to black, usually 

 dark brown lateral to the parapsidal grooves; mesonotum smoothed and 

 shining, but distinctly uneven and irregularly coriaceous in places, dis- 

 tinct strise radiating from the midpoint of the posterior margin, an- 

 teriorly much more coriaceous or even rugose antero-laterally ; parap- 

 sidal grooves, median, anterior parallel, and lateral lines more distinct 

 than in compactus; scutellum yellow rufous or darker, almost black on 

 the edges, finely rugose but not as finely as in compactus ; arcuate furrow 

 at base of scutellum rather wide, the division into foveas hardly evident; 

 pronotum rich rufous, brown black on the edges; mesopleurae wholly, 

 unevenly coriaceous to aciculate; abdomen rich rufous brown, splotched 

 with brown black; wing veins rather heavy, dark brown; areolet large 

 to very large; length 1.7-2.3 mm. 



GALL. — A stem swelling, diifering from that of both other varieties 

 in being more asymmetrical, about 20. mm. long by 7. mm. wide, with 

 the larval cells mostly between the modified bark and the wood. On 

 stems of Quercus chrysolepis, 



RANGE. — California: Ukiah, Probably confined to a limited area 

 in the region of Mendocino and northern Sonoma counties. 



TYPES. — 14 females, 2 galls. Holotype female, paratype females, 

 and gall in The American Museum of Natural History; paratype females 

 and gall with the author; paratype females at Stanford University and 

 the U.S. National Museum. Labelled Ukiah, California; March 17, 

 1920; Kinsey collector. 



All of the type females were cut from the galls, failing to 

 emerge probably because the galls were collected too earlv 

 (March 17). 



The gall of this variety is rather distinct from that of 

 the other varieties ; the insects closely resemble those of vari- 

 ety annectens. ; 



Plagiotrichus asymmetricus variety annectens, new variety 



FEMALE. — Almost identical with the female of variety rs,; - 

 metricus (q. v.), differing as follows: Generally of darker color; scutel- 



