48 
Indiana University Studies 
bisexual female. A difference in size and shape of the abdo- 
men may be noticeable in large series, but we do not now 
have enough material to decide the point. The complementary 
dates of occurrence of the two forms, and their close identity 
make it quite certain that they are alternates. The occur- 
rence on the two different hosts is not remarkable; probably 
both forms occur on both stellata and hreviloha at Austin. 
This is true of variety nigripes, and care must be taken to 
distinguish pattersoni and nigripes; the characteristics in the 
descriptions are quite constant guides to both insects and 
galls. 
Neuroterus niger variety pei minimus Bassett 
bisexual form 
Neiiroterus perniinimus Bassett, 1900, Trans. Amer. Ent. Soc., XXVI, 
p. 332. Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., 
p. 51; 1910, Das Tierreich, XXIV, pp. 332, 819, 826. Thompson, 
1915, Amer. Ins. Galls, pp. 13, 41. Viereck, 1916, Hymen. Conn., 
p. 392. Kinsey, 1922, Bull. Amer. Mus. Nat. Hist., XLVI, p. 294. 
Cresson, 1923, Trans. Amer. Ent. Soc., XLVIII, p. 201. 
Neuroterus niger Beutenmuller, 1910 (in part). Bull. Amer. Mus. Nat. 
Hist., XXVIII, p. 121. Beutenmuller in Smith, 1910 (in part). Ins. 
N.J., p. 599. Felt, 1918 (in part), N.Y. State Mus. Bull., 200, 
p. 82. 
FEMALE. — Color generally dark piceous to piceous black; the legs 
and antennse a medium brown, the antennae only limitedly lighter ba- 
sally; areolet quite small; length 0. 7-1.0 mm. 
MALE. — As described for the species. 
GALL. — Small, oval, rather elongate, with sharply-defined boun- 
daries, without a trace of a central point on the upper surface. On 
Qiiercus alba. 
RANGE. — Ohio: Rockport (Bassett). New York: New York City 
(Beutenmuller). Probably confined to a more northeastern part of the 
United States. 
TYPES. — Females, males, and galls. Holotype female and paratype 
adults and galls at the Philadelphia Academy, paratypes in the Kinsey 
collection. From Rockport, Ohio; Q. alba; Bassett collector. 
Bassett recorded mature galls on June 25, with adults 
emerging before July 10 in one year, and before June 28 in 
1900. I have collected galls from the typical host, Q. alba, 
at Forest Hills, Massachusetts, which appear to belong to 
an undescribed variety, but insects and galls in The American 
Museum of Natural History, from Q. alba in New York City 
appear to agree with the types. Varieties in this species are 
