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shown, then an examination of the vernations of the buds in 
which the insects oviposit may explain the matter. There 
is little chance of there being any great differences in the 
physiologies of the two varieties. 
Each of the two described varieties is confined, it would 
appear, to a single species of oak. About 40 varieties should 
occur on related oaks in the eastern half of North America. 
The bisexual insect is short-lived, its gall evanescent, and 
consequently not often collected. An alternate, agamic gen- 
eration, producing perhaps a stem or leaf swelling, probably 
exists, but I fail to recognize this form among any of our 
described species of Neuroterus, 
Neuroterus minutus variety minutus (Bassett) 
Cynips minuta Bassett, 1881, Can. Ent., XIII, p. 96. Packard, 1881, 
U.S. Ent. Comm. Bull., VII, p. 57. Cresson, 1923, Trans. Amer. 
Ent. Soc., XLVIII, p. 200. 
Neuroterus minutus Mayr, 1881, Gen. Gallenbew. Cynip., p. 37. Ash- 
mead, 1885, Trans. Amer. Ent. Soc., XII, pp. 296, 303; 1887, Trans. 
Amer. Ent. Soc., XIV, p. 131. Ashmead in Packard, 1890, 5th Rpt. 
U.S. Ent. Comm., pp. 107, 109. Dalla Torre, 1893, Cat. Hymen., 
II, p. 44. Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., 
p. 51. Beutenmuller, 1904, Bull. Amer. Mus. Nat. Hist., XX, p. 26; 
1910, Bull. Amer. Mus. Nat. Hist., XXVIII, p. 127, pi. XII, figs. 3-5. 
Beutenmuller in Smith, 1910, Ins. N.J., p. 599. Dalla Torre and 
Kieffer, 1910, Das Tierreich, XXIV, pp. 332, 812. Thompson, 1915, 
Amer. Ins. Galls, pp. 12, 41. Viereck, 1916, Hymen. Conn., p. 395. 
Felt, 1918, N.Y. State Mus. Bull., 200, p. 78, figs. 53 (3-5), 70, 71. 
Neuroterus minutulus Dalla Torre and Kieffer, 1910 (error, not Giraud, 
1859) , Das Tierreich, XXIV, p. 826. 
FEMALE. — General color lighter brownish piceous; mesonotum very 
faintly roughened; coxae wholly light yellow; areolet of moderate size 
or less; length 1.2-1.5 mm. 
MALE. — As described for the species. 
GALL. — An elongate, irregularly cylindrical swelling of a petiole 
or midvein. Polythalamous, with a moderate number of cells. Each 
gall irregularly cylindrical, elongate, up to 5. mm. in length, sometimes 
several galls more or less fused; covered with normal tissue and an 
additional pubescence, pinkish when young, drying brownish. Internally 
more or less solid, with the larval cells rather closely packed, without 
distinct cell walls. On petioles and leaf veins, more or less dwarfing 
and deforming the leaf; on Quercus alba (figs. 45, 46). 
RANGE. — Connecticut: Waterbury (Bassett). New York, New 
Jersey, Pennsylvania (Beutenmuller). Probably confined to Q, alba 
in a northeastern part of the United States. 
