Kinsey: Studies of Cynipidse 



27 



finely, faintly aciculate centrally; abdomen yellow rufous basally; the 

 hind tibise dark brown to almost black; length 1.7-2.2 mm., averaging 

 smaller than in operator. 



MALE. — Shows the secondary sexual characteristics of the Species, 

 and further differs from the female of this variety as follows : Face 

 dull yellow, antennae dull yellow, only the basal segment brownish; the 

 third segment almost half again as long as the fourth; thorax dull 

 yellowish rufous; legs dull yellowish, the hind femora and tibiae some- 

 times brownish; length 1.2-2.0 mm., averaging less than in the female. 



GALL. — Similar to the woolly galls of the other varieties; white, 

 weathering light brown in part; 15.-25. mm. in diameter, usually irregu- 

 lar in shape. On young twigs (from the bud) of Quercus Schneckii. 



RANGE. — Texas: Austin. Possibly confined to an area including 

 eastern Texas, on black oaks. 



TYPES. — 18 females, 125 males, 3 galls. Holotype female, para- 

 type females, males, and gall at The American Museum of Natural 

 History; paratype females, males, and galls with the author; paratype 

 females and males at the U.S. National Museum and Stanford Uni- 

 versity; paratype males at the Museum, of Comparative Zoology and the 

 Philadelphia Academy. Labelled Austin, Texas; April 24, 1921; Q. 

 Schneckii; Patterson collection number 64. 



Patterson first found this gall on April 1, 1921 ; it had not 

 been observed before that date, but pupse were forming in the 

 galls at the time. This indicates a very rapid development of 

 the young gall. Adults began emerging April 24. From a 

 single gall Patterson bred 128 males and no females ; a single 

 gall sometimes produces only a single sex. 



This insect is more closely related to variety consohrinus 

 than to the other varieties. Thus far we have obtained it 

 only from Q. Schneckii; other black oaks in the same region 

 may support this variety, or may have isolated still other va- 

 rieties. We have galls of an agamic form of this species from 

 Austin on Q. mctrijlandica (Patterson collection 144) ; whether 

 these represent the alternate generation of ciustrior I cannot 

 say until we can obtain insects. 



Andricus operator variety falsus, new variety 

 form falsus, new form 



Callirhytis ojjerator Beutenmuller (in Smith), 1910, Ins. N.J., p. 601. 

 Thompson, 1915 (Pv.I. record), Amer. Ins. Galls, pp. 11, 30, pi. 2, 

 fig. 169. 



Andricus operator form operator Kinsey, 1920 (in small part), Bull. 

 Amer. Mus. Nat. Hist., XLII, p. 345, pi. XXXI, fig. 32. 



FEMALE. — Difi'ers from the bisexual female of variety operator as 

 follows : Parapsidal grooves moderately wide posteriorly, smooth at bot- 



