40 



Indiana University Studies 



imity on a single tree. I do not yet have insects enough to 

 determine what varieties are represented here. Variety 

 pomiformis occurs in the same faunal area, but was originally 

 described from agrifolia. This oak is restricted to the coast 

 country in the north, and does not occur in the northern 

 Sierras. It is not improbable that variety pomiformis takes 

 itself to Wislizenii where agrifolia is absent, that in so doing 

 it comes into contact with a northern variety matching dis- 

 tinctus, and that the two may interbreed where they occur 

 on the same host. 



The San Bernardino variety on Wislizenii is separate from 

 distinctus, and shows relations to maculipennis as much as to 

 distinctus. In this range again agrifolia is not to be found. 



Andiicus pomiformis variety provincialis, new variety 



FEMALE. — Shows the following characteristics in addition to those 

 common to all varieties of the species: Parapsidal grooves wider than 

 in any other variety, but shallow and largely rugose; no trace of a 

 median groove; anterior parallel lines discontinuous, in part lost in the 

 sculpturing; lateral lines very fine; mesopleurae with the smooth area 

 wholly naked, with almost no punctures; foveas larger, more elongate 

 than in other varieties, not wholly smooth at bottom, separated by a 

 shallow, rugose area; median depression of the scutellum deeper than 

 in other varieties; areolet of moderate size to very small; the cloud on 

 the first abscissa of the radius only moderately large. 



GALL. — With a smooth surface; quite identical with that of all 

 other varieties except distinctus. On Quercns Wislizenii. 



RANGE. — California: San Bernardino mountains. Probably con- 

 fined to the neighborhood of this range. 



TYPES. — 32 females, 14 galls. Holotype female, paratype females, 

 and galls at The American Museum of Natural History; paratype fe- 

 males and galls at Stanford University, the U.S. National Museum, 

 the Museum of Comparative Zoology, and with the author. Labelled 

 San Bernardino, California; January 31, 1920; Q. Wislizenii; Kinsey 

 collector. 



On January 31, 1920, galls showed that adults had emerged 

 previously, but also contained live larvae and adults. 



The best characters for distinguishing this variety are the 

 more elongate fovese and the deeper median depression of the 

 scutellum. Altho the variety occurs on Wislizenii it does 

 not show closer relationship to the other varieties on that 

 host than it does to the varieties on aginfolia. Of thirty-six 

 individuals from the San Bernardino mountains, four are 

 closer to maculipennis than to this variety. Many of the 



