14 



Indiana University Studies 



were very abundant at this place on March 3, no new galls 

 were in evidence. 



Undoubtedly this distinct variety, previously undescribed, 

 has been repeatedly observed by numerous entomologists, in- 

 cluding collectors of Cynipid?e, but it and its inviting prob- 

 lems of such general biologic import have probably been dis- 

 missed with the remark, quoting from the literature: 'The 

 familiar 'oak-apple' 



Andricus californicus varietj^ intermedius, new variety 



FEMALE. — Shows the following characters in addition to those 

 common to all varieties of the species: Color rich rufous brown, mostly 

 dark, darker than in any other variety, blackish on the lateral lines, in 

 the fovese, on the edges of the mesopleurse, on the abdomen dorso-basally, 

 and elsewhere; antennae dark brown, only somewhat enlarged termin- 

 ally, not very short, with only 14 segments; parapsidal grooves fine at 

 the scutellum, finer anteriorly, extending only two-thirds to the pro- 

 notum; median groove lacking; scutellum with the anterior depression 

 partly smooth and shining, forming quite distinct fovese; areolet of 

 moderate size, distinctly smaller than in fructiformis; length 3.7 mm. 



GALL. — Practically identical with the galls of variety fructiformis. 

 On Quercus dumosa. 



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

 fined to this mountain range. 



TYPES. — 1 female, 7 galls. Holotype female, paratype gall at 

 The American Museum of Natural History; paratype galls at Stanford 

 University, the U.S. National Museum, and with the author. Labelled 

 San Bernardino, California; January 31, 1920; Kinsey collector. 



Most of the adults had emerged by January 31, but one 

 live female was still in the gall. The galls were abundantly 

 eaten into, probably by birds. 



This variety shows evident relationship to variety fructi- 

 formis, but is astounding in its distinctness. The galls of the 

 two are remarkably similar. Tho fructiformis has com- 

 plete parapsidal grooves, this closely related variety has dis- 

 tinctly incomplete grooves, further emphasizing the lack of 

 generic value to this character. There is no indication in this 

 variety of a division in the fourteenth segment of the antenna, 

 and fructiformis regularly shows fifteen distinct segments. 



Intermedius may be largely confined to the San Bernar- 

 dinos, as are most other varieties of cynipids found in that 

 range, as far as we know. Of all instances of this remarkable 

 distribution, intermedius furnishes one of the most distinct. 



