1912]. The Pezomachini of North America 131 
shagreened than that of the mesothorax, especially behind the carina; 
pubescence more sparse, especially on the disc, but distinctly longer. 
Legs long and slender, rather lighter in color than the thorax. Fore and 
mid legs inclined to be testaceous. Petiole long and slender with rather 
prominent spiracles, behind which the sides are parallel. Remainder 
of abdomen slender, terminating with broad testaceous claspers. The 
color of the abdomen is variable, but is mainly fuscous; the petiole and 
following two or three segments may have dull yellow or whitish apical 
bands. The entire surface is closely punctulate and covered with a 
rather dense pubescence. 
Observations. Described from 22 specimens taken at Twin- 
ing, Maryland. 
Form with rudimentary wings. 
Head, ‘‘metathorax,”’ legs and abdomen as in winged form. Meso- 
thorax reduced in. size; with a much smaller scutellum. The poorly 
defined parapsidal grooves are widely separated anteriorly but meet at 
about the middle of the mesonotum continuing to the scutellum as a 
single median shallow groove. They thus resemble together the letter 
Y. Mesothoracic wings small, extending to about the middle of the 
second abdominal segment. They were much crumpled in the speci- 
men but the venation was apparently not very abnormal. The areolet 
was missing and there was an extra recurrent vein from the somewhat 
contorted stigma. The metathoracic wings were entirely missing. 
Observations. Described from a single specimen from Twin- 
ing, Maryland. This specimen was bred from an egg nest 
from which also emerged, one fully winged male, one apterous 
male and one female. 
Wingless form. 
Similar to winged forms except for the mesonotal structure. The 
ocelli also are always small. Mesonotum much narrower than the head, 
with a tuberculate scutellum. Parapsidal grooves, may be slightly 
separated anteriorly, usually only visible as a shallow posterior depres- 
sion. The surface of the mesonotum is pubescent as in the winged 
form. 
Observations. Described from about 30 specimens taken at 
Twining, Maryland, and from one taken at Cornell. 
On an average these are much smaller than the winged 
forms which would suggest that their apterous condition is in 
some way connected with an insufficiency of food. 
Both types of male were often bred from the same cocoon 
together with females which are much more constant in form 
than the males. 
Types in the National Museum. 
