290 THE ENTOMOLOGIST. 
33. Aphilothrix callidoma, Hart.—This beautiful spindle- 
shaped and long-stalked gall breaks forth from the axils of 
Quercus pubescens in such a manner that the small bud, 
a. APHILOTHRIX CALLIDOMA in situ. b. Detached. c. A section of the same. 
from the point of which the thin pedicle proceeds, is not 
altered externally. The gall is about the size of a barley- 
corn, either short or long spindle-shaped. Its surface is 
green or red when recent; later on it becomes reddish brown, 
and exhibits a few or many either sharp or indistinct longi- 
tudinal striations. However, in some specimens there is not 
a trace of these striations to be detected. The top of the gall 
is marked, and terminates in a wart or short cone: it has a 
yellow-brown colour, and is bald; the remaining part of the 
gall and the foot-stalk are scantily covered with moderately 
short, white, deflected hairs. Sometimes one meets with 
specimens in which the thin stalk is rather short, and the 
basal half of the spindle very long, with the upper half, 
however, very short. In the section the cell appears as a 
large, longitudinally oval cavity, bordered by a thin, white, 
inner gall, whichis on all sides conterminous with the substance 
of the gall; above and beneath this inner gall is found a 
brown reticulation. According to Dr. Giraud’s observations 
the galls are found from the month of July to October, and 
the earliest fall off, whilst others are only beginning to 
develop themselves. I have myself only found them once late 
in the autumn.—G, LZ. Mayr. 
This gall was first described by Malpighi; and Hartig did 
