Indiana University Studies 
ri8 
Neuroterus rileyi variety atripleurae, new variety 
agamic form 
FEMALE. — Antennae basally dull, dark yellow, the thorax laterally 
wholly black, the abdomen piceous brown, the legs yellow, dark brown 
on the coxae, the femora, and the hind tibiae, except at the joints; the 
areolet moderately small to very small; the length 1.5-1. 7 mm. 
GALL. — As described for the species; of medium size, the swelling 
elevated to 2.5 mm. above the stem. On older twigs of Quercus Prinus. 
RANGE. — Oklahoma: Pawnee. Probably thruout the oak areas of 
Oklahoma, Arkansas, western Louisiana, and eastern Texas. 
TYPES. — 5 females, 3 galls. Holotype female, paratype female, 
and gall at The American Museum of Natural History; paratype females 
and galls with the author. Labelled Pawnee, Oklahoma; April 28, 1920; 
Q. PriniLs; Kinsey collector. 
Live adults were in these galls on April 28, 1920, while 
some had already emerged at that date. The variety may be 
distinguished by the small areolet and dark mesopleurse. This 
is the agamic generation, and the alternate should be very 
similar, bisexual, in smaller galls on younger twigs, starting 
growth in May and emerging in July. - 
Neuroterus rileyi variety mutatus, new variety 
agamic form 
FEMALE. — Antennas straw yellow basally; thorax laterally black, 
with a touch of yellow on the metathorax; abdomen piceous brown with 
a small touch of yellow basally; legs light yellow including the coxas, 
brownish on the centers of all femora and the hind tibias; areolet mod- 
erately small; length 1.2-1.7 mm. 
GALL. — As described for the species, but large, woody, up to 12. 
mm. in diameter (whole stem) ; on the stems of Quercus Muhlenbergii. 
RANGE. — Texas: Hamilton’s Pool (Travis Co.). Probably con- 
fined to an area in Central Texas. 
TYPES. — 28 females, 2 males, 1 gall. Holotype female and para- 
type females at The American Museum of Natural History; paratype 
females, males, and gall in the Kinsey collection; paratype females at 
the U.S. National Museum, the Museum of Comparative Zoology, and 
the Philadelphia Academy. Labelled Hamilton’s Pool (Travis Co.), 
Texas; April 2, 1922; Q. Muhlenbergii; Gardner collector; Patterson 
collection number 180. 
The occurrence of this insect on a distinct host in a very 
v/ell-deflned faunal area has clearly favored the development 
of a distinct variety. The gall is so much larger than in 
other varieties that it somewhat resembles galls of N. batatus. 
