10 



Indiana University Studies 



is an extreme development of seasonal dimorphism. With 

 such large adults, and monstrous and abundant galls as this 

 species has, it should not be a difficult matter for some one 

 on the held to experimentally discover this life history. 



Andricus californicus variety californicus (Bassett) 



Cynij^s Q. Californica Bassett, 1881, Can. Ent., XIII, p. 51. Riley, 1881, 

 Amer. Nat., XV, pp. 402, 403. 



Andricus californicus Mayr, 1881, Gen. gallenbew. Cynip., p. 28. Ash- 

 mead, 1885, Trans. Amer. Ent. Soc, XII, pp. 295, 304. Ashmead 

 in Packard, 1890, 5th Rpt. U.S. Ent. Comm., p. 110. Dalla Torre, 

 1893, Cat. Hymen. Cynip., II, p. 81. Dalla Torre and KiefFer, 1902, 

 Gen. Ins. Hymen. Cynip., p. 62. Kellogg, 1914, Amer. Ins., p. 472, 

 fig. 665. Thompson, 1915, Amer. Ins. Galls, p. 8. Felt, 1918, N.Y. 

 Mus. Bull., 200, p. 62. 



Andricus (Callirlmjtis) californicus Ashmead, 1885, Trans. Amer. Ent. 

 Soc, XII, p. 294. Ashmead in Packard, 1890, 5th Rpt. U.S. Ent. 

 Comm., p. 105. 



Callirhytis californica Ashmead, 1887, Trans. Amer. Ent. Soc, XIV, 

 p. 132. 



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

 XX, p. 25. 



Andricus quercus-calif ornicus Dalla Torre and KiefFer, 1910, Das Tier- 

 reich, XXIV, pp. 531, 803. Trotter, 1910, Boll. Lab. Portici, V, 

 p. 111. Fullaway, 1911, Ann. Ent. Soc Amer., IV, p. 346; 1912, 

 Journ. N.Y. Ent. Soc, XX, pp. 275, 280. 



FEMALE. — Shows the following characters in addition to those 

 common to all varieties of the species: Color almost entirely light 

 brownish rufous; antennae slightly darker than the head, darkest mid- 

 length, rather short, distinctly enlarged terminally, with only 14 seg- 

 ments; parapsidai grooves moderately broad at the scutellum, becoming 

 finer anteriorly, not extending much more than half the length of the 

 mesothorax; median groove lacking; scutellum with the anterior de- 

 pression rugose, smoother laterally, but hardly forming distinct foveas; 

 length 4.0-5.0 mm. 



GALL. — Difi'ers from the galls of other varieties of the species as 

 follows: Color light brownish tinged slightly reddish, to light straw 

 yellow, usually yellow, weathering dark brown to black; usually more 

 completely filled with the crystalline material than in other varieties. 

 Very young galls cause a lateral swelling of the stem which often be- 

 comes 4. mm. or more high before the bark breaks; young galls are 

 very succulent, red when first breaking thru; old galls persist on the 

 trees for years. Maximum length observed, 113. mm. On Quercus 

 lobata and Q. Douglasii. 



RANGE. — Between the ranges of the other varieties. California: 

 Grant (Trotter) ; Exeter, Three Rivers, Merced Falls, El Portal, Paso 

 Robles, Byron, Oakdale, Gilroy (Redwood School), Palo Alto, Redwood 



