18 



Indiana University Studies 



average 2.5 x 1.5 mm., and which are arranged rather radiantly about 

 the mid-point of the base. Attached by a slight projection of the woody 

 gall to the mid-vein or often to the petiole, occasionally two together, 

 on either surface, usually on the under surfaces of leaves of Quercus 

 chrysolejjis. 



RANGE. — California: El Toro to Ukiah and Dunsmuir. 



I cannot fix characters which will distinguish the galls of 

 the varieties, for they are very similar. Here is an instance 

 of the physiologic measure of the insect varying less than 

 does the morphologic. Morphologically ^he varieties are also 

 very similar. What differences do exist are correlated with 

 the occurrence of the faunal areas. 



Andricus lasius variety lasius (Ashmead) 



CalHrhytis Icisius Ashmead, 1896, Proc. U.S. Nat. Mus., XIX, p. 132. 



Thompson, 1915, Amer. Ins. Galls, pp. 20, 29. Felt, 1918, N.Y. 



Mus. Bull., 200, p. 115. 

 CalHrhytis lasia Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., 



p. 66; Das Tierreich, XXIV, pp. 567, 815, 829. Fullaway, 1911, 



Ann. Ent. Soc. Amer., IV, p. 356. 



FEMALE. — Shows the following characters in addition to those 

 common to all varieties of the species: Almost entirely yellow rufous, 

 antennai light brown, rufous basally; parapsidal grooves rather less 

 closely convergent at the scutellum; abdomen yellow to brownish rufous, 

 darkest dorsally, about as wide as long, the second segment covering 

 more than half the area; middle and posterior tibiae and all tarsi brown- 

 ish ; wing veins light brown, first abscissa of the radius bent very close 

 to the subcosta; areolet moderately large. 



GALL. — Does not differ particularly from galls of the other varieties. 



RANGE. — California: Dunsmuir (?), Auburn, Placerville. Prob- 

 ably occurs in the central Sierras, north of El Portal, wherever Q. 

 chrysolepis occurs. 



TYPES. — Females and galls; in the U.S. National Museum; labelled 

 No. 3091. Placer County, California; December 19, 1885; Albert Koebele 

 collector. 



The above descriptions are made from types of this vari- 

 ety and from my material. Ashmead bred adults December 

 19, and January 2 ; in the Museum of Comparative Zoology 

 is material bred December 15, by Dr. I. McCracken. All but 

 a very few of the adults had emerged before my collecting 

 in March and April ; these very few other adults died with- 

 out emerging. The most northern record, Dunsmuir, is for 

 galls only; adults from that locality may prove to be of still 

 another variety. 



