36 



Indiana University Studies 



GALL. — Very much like that of all other varieties except distinctus; 

 the surface smooth. On Quercus agrifolia (and Q. Wislizeniil) . 



RAKGE.— California: San Francisco? (Bassett) ; Stanford Univer- 

 sity (Fullaway) ; Mt. Diablo (F. A. Leach coll.) ; Palo Alto, Salinas, 

 Gilroy (Redwood School). Probably restricted to a region in central 

 California. 



TYPES. — Adults and galls at the Philadelphia Academy, The Ameri- 

 can Museum of Natural History, and the Museum of Comparative Zo- 

 ology. From San Francisco (?), California; H. D. Bassett, collector; 

 on Quercus agrifolia. 



Bassett recorded this variety as emerging in March. None 

 of the galls which I collected after March 8 contained adults, 

 and fresh galls had not yet appeared in more northerly local- 

 ities by April 1. The variety may require only a year to ma- 

 ture, in contrast to the history of southern varieties which may 

 take up to three years to mature. An alternate generation 

 is entirely possible for this variety. 



The original host was Quercus agrifolia, and in the south- 

 ern part of the range, nearer the coast, agrifolia is the only 

 host. In the northern Coast Range, at least in Mendocino 

 County, and in the Sierras north of El Portal, agrifolia does 

 not occur, but there Wislizenii bears a similar gall. In addi- 

 tion Wislizenii bears a shaggy-coated gall similar to the south- 

 ern variety distinctus. I have this latter gall from Placer- 

 ville. Auburn, Oroville, and Ukiah, but I do not have adults 

 enough of either smooth or shaggy galls from these localities 

 to make definite determinations. As I suggest in the detailed 

 discussion under distinctus it is possible that pomiformis 

 takes to Wislizenii where agrifolia is lacking, and meeting a 

 variety representing distinctus in the north sometimes inter- 

 breeds with it. 



Andricus pomiformis variety maculipennis (Kieffer) 



CalHrhytis macidijiennis Kieffer, 1904, Bull. Soc. Metz, (2), XI, p. 131; 

 1904 (in Baker), Invert. Pacif., I, p. 42. Dalla Torre and Kieffer, 

 1910, Das Tierreich, XXIV, pp. 587, 808, 825. Fullaway, 1911, Ann. 

 Ent. Soc. Amer., IV, p. 358. Felt, 1918, N.Y. Mus. Bull., 200, p. 76. 

 Johnson and Ledig, 1918, Pomona Coll. Journ. Ent. and ZooL, X, 

 p. 26. 



?Callirhytis Rossi Trotter, 1910, Boll. Lab. Portici, V, p. 110. 

 Cynijnde, 31, Trotter, 1910, Boll. Lab. Portici, V, p. 112, pi. I, figs. 5, 6. 

 Andricus pomiformis Kinsey, 1920, Bull. Amer. Mus. Nat. Hist., XLII, 

 p. 383. 



