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Indiana University Studies 



Callirhytis Suttoni Ashmead, 1887, Trans. Amer. Ent. Soc, XIV, p. 130. 



Ashmead (in Packard) 1890, 5th Kept. U.S. Ent. Comm., p. 110. 



Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., p. 67. 

 Callirhytis suttonii Beutenmuller, 1904, Bull. Amer. Mus. Nat. Hist., 



XX, p. 25. Thompson, 1915, Amer. Ins. Galls, pp. 7, 30. 

 Callirhytis querctis-suttoni Dalla Torre and Kieffer, 1910, Das Tierreich, 



XXIV, pp. 564, 801. 

 Callirhytis suttoni Felt, 1918, N.Y. Mus. Bull., 200, p. 60. 



FEMALE. — Shows the following characters in addition to those 

 common to all varieties of the species: Color generally darker rufous; 

 first two segments of the antennae almost black; mesonotum quite hairy; 

 parapsidal grooves narrow but wider than in other varieties; anterior 

 parallel lines not wholly smooth, extending not half way to the scutel- 

 lum; mesopleura smooth and naked on only a small area beneath the 

 tegulae; hind coxm brov/nish rufous to piceous; areolet very large; first 

 abscissa of the radius sharply angulate, v/ith a short spur; length 3.0-4.0 

 mm., averaging distinctly larger than in suttonii, 



GALL. — Differs from the galls of the other varieties in being more 

 robust, not as elongate as in lustrior, attaining a larger size, up to 60. 

 mm. in diameter by 90. mm. long, fused galls reaching 115. mm. in 

 diameter, usually much smaller. On Quercus agrifolia. 



RANGE. — California: near San Francisco (Bassett) ; Oakland 

 (types) ; Diablo (F. A. Leach collector) ; Carmel, Salinas, San Luis 

 Obispo, Paso Robles, Gaviota, Santa Barbara, llestricted to a m.ore 

 northern part of the range of Q. agrifolia. 



TYPES. — At the Philadelphia Academy of Natural Sciences, The 

 American Museum of Natural History, the Museum of Comparative 

 Zoology; and in the Beutenmuller collection (?). From near San Fran- 

 cisco, California; oak unknown; Wm. Sutton, collector. American 

 Museum types are labelled Oakland. 



Insects were emerging from galls I collected at Carmel on 

 March 9, 1920. 



The above descriptions are made from types, the coloring 

 described from my material from Carmel. Old specimens, of 

 several collections, are always faded a brighter rufous. 



This variety is not very different from the more southern 

 polythyra which also occurs on agrifolia. It is best distin- 

 guished by the larger areolet, the very sharply angulate first 

 abscissa, and the larger size. I am not certain of the extent 

 of the faunal area which includes agrifolia about San Fran- 

 cisco. The Santa Barbara insects are nearer this variety than 

 polythyra, but do not have the first abscissa so sharply 

 angulate. 



