84 
Indiana University Studies 
NeuroteQ-us batatas Wells, 1921, Bot. Gaz., LXXI, p. 377, pi. XXII, fig. 1. 
FEMALE. — The lower part of the face dark piceous, the mouth- 
parts rufo-piceous; the antennae brownish yellow basally; thorax dis- 
tinctly robust and only a little longer than wide; abdomen often (not 
always) produced ventrally; legs brownish yellow; areolet of moderate 
size or rather large; the first abscissa distinctly angulate with a slight 
projection; length 1. 7-2.2 mm. 
GALL. — As described for the species; large, woody, on stems of 
Quercus alba, 
RANGE. — New Hampshire: Wolfeboro. Massachusetts: Everett 
(Clarke); Marthas Vineyard, Blue Hills, Boston; Auburn, Amherst 
(Thompson); Springfield (Stebbins) ; Westport (Felt). Rhode Island: 
Providence (Thompson). Connecticut: New Haven (Champlain, Wal- 
den); Waterbury (Bassett); Durham (Lowry in coll. Conn. Exp. Sta.). 
New York: New York City, Neperan, Long Island City (Beutenmuller) ; 
Staten Island (W. T. Davis); S. E. Easton Hills, Rochester (Felt). 
New Jersey: Fort Lee (Beutenmuller); New Brunswick (J. B. Smith). 
Probably restricted to a northeastern area of the United States. 
TYPES. — Fitch types not located. “Types” of Bassett material 
cannot have authority. 
I have not seen the Fitch types, but Dr. Felt has sent 
me material from Albany, New York, which is probably near 
the type locality. 
The gall of this generation begins development in mid- 
summer, the insects remaining in the galls over winter and 
emerging in April or early in May. Thus this agamic gen- 
eration takes nine or ten months to develop, while the bisexual 
occupies only a couple of months. This variety is probably 
restricted to the single oak, Q, alba, in the northeastern part 
of the United States. The insect of variety noxiosus is very 
similar, differing mainly in coloring and its restriction to 
Q, bicolor. 
Neuroterus batatus variety batatus 
bisexual form bisexualis Kinsey 
Involved, without distinctive name, in most references to the agamic 
form dated 1865 or later. 
Neuroterus batatus form bisexualis Kinsey, 1920, Bull. Amer. Mus. Nat. 
Hist, XLII, pp. 334, 377, figs. 8 and 9. 
FEMALE. — Differs from the female of the agamic generation only 
in having the abdomen less often produced ventrally, the whole insect 
averaging smaller, 1. 2-2.0 mm. 
MALE. — As described for the species. 
GALL. — Similar to that of the agamic generation, but much smaller. 
On young stems of Quercus alba. 
