Kinsey: Studies of Cynipid^e 



109 



The adult of this variety is remarkably distinct, consid- 

 ering how similar the insects of the other two varieties are. 

 The gall, however, is quite like that of annectens. It is often 

 broken into, apparently by birds or mice in search of the 

 cluster of larvae, for food. Most of the insects had emerged 

 before collection on March 26 at El Portal. 



Plagiotrichus batatoides (Ashmead) 



[gall only] Osten Sacken, 1862, Proc. Ent. Soc. Phila., I, p. 259. 



Cynips q. batatoides Ashmead, 1881, Trans. Amer. Ent. Soc, IX, p. XL 



Cynips batatoides Packard, 1881, U.S. Ent. Comm. Bull., VII, p. 57. 



Andricus batatoides Ashmead, 1885, Trans. Amer. Ent. Soc, XII, p. 295; 

 1887, Trans. Amer. Ent. Soc, XIV, p. 132. Ashmead (in Packard), 

 1890, 5th Pvpt. U.S. Ent. Comm., p. 106. Dalla Torre, 1893, Cat. 

 Hymen. Cynip., II, p. 80. Dalla Torre and Kieffer, 1902, Gen. Ins. 

 Hymen. Cynip., p. .61. Beutenmuller, 1904, Bull. Amer. Mus. Nat. 

 Hist., XX, p. 24. Thompson, 1915, Amer. Ins. Galls, pp. 6, 31. Felt, 

 1916, N.Y. Mus. Bull., 186, p. 93; 1918, N.Y. Mus. Bull., 200, p. 58. 



Callirhytis batatoides Mayr, 1902, Verh. Ges. Wein, LII, p. 289. Beuten- 

 muller (in Dozier), 1920, Ann. Ent. Soc. Amer., XIII, p. 373. 



Callirhytis quercus-batatoides Dalla Torre and Kieffer, 1910, Das Tier- 

 reich, XXIV, pp. 566, 802, 838. 



FEMALE. — Shows the following characters in addition to those 

 common to all species of the genus : Color largely light brownish rufous, 

 without any black; antennae with 15 segments; mesonotum entirely, 

 rather closely, rather coarsely puncto-rugose ; parapsidal grooves almost 

 continuous, moderately broad and distinct at the scutellum, broader than 

 in any other variety of the genus; median groove somewhat evident for 

 a short distance; mesopleurse almost wholly puncto-rugose, light brown- 

 ish rufous; foveas distinct, broadly separated, of moderate size, largely 

 rugose at bottom, in small part almost smooth; abdomen light brownish 

 rufous, darker posteriorly especially dorsally, smooth, naked except for 

 a few hairs latero-basally, posterior segments finely, definitely reticulated, 

 most faintly so posteriorly, longer than high, the second segment covering 

 fully two-thirds the area; legs largely light brownish rufous, only 

 slightly browner on the coxae and the tibiae; cubitus complete but very 

 fine and faint at the basalis; areolet of moderate size or rather large, 

 elongate on the cubitus; length averaging close to 3.0 mm. 



GALL. — Quite similar to the galls of the other agamic forms of the 

 genus; generally large, robust, up to 20. mm. in diameter and 28. mm. 

 long; usually more irregular, composed of rather distinct, rounded parts, 

 more or less fused; internally inclined to become partly hollo^^', the larval 

 cells closely embedded, not very distinctly lined. On twigs of Que reus 

 virginiana. 



RANGE. — Florida, Georgia, and possibly elsewhere. The typical 

 variety confined to an area including Jacksonville, Florida. 



TYPES. — In the U.S. National Museum, The American Museum of 

 Natural History, the Philadelphia Academy of Natural Sciences, the 



