78 
Psyche 
[April 
CORRODENTIA 
Family Psocidce 
The four species listed below were examined and named for 
me by Mr. Nathan Banks. 
Psocus leidyi Aaron, two specimens. 
Psocus variabilis Aaron, two specimens. 
Myopsocus sparsus Hagen, seven specimens. 
Peripsocus permadidus Walsh, one specimen. 
The members of this interesting group are said to feed 
mainly upon lichens and fungi and many species are conse- 
quently associated with trees and old wood. 
Thysanoptera 
Two species were taken which have been very kindly 
identified by Dr. J. D. Hood. 
Family Phlceothripidce 
Hoplothrips karnyi major Hood, two females, July 20 and 26. 
Trichothrips sp. One male, July 20. This is probably an 
undescribed species known to Dr. Hood from Illinois also. 
Hymenoptera 
Family Xiphydriidce 
Xiphydria maculata Say. 147 specimens of both sexes, July 
13 to September 26. The great majority of the specimens 
emerged during the third week in July. The females are ex- 
tremely variable in size ranging from 8 to 20 mm. in length 
while the males range from 7-12 mm. This species is known to 
breed in maple and most if not all the individuals in the present 
series emerged from red maple logs. 
Species of Xiphydria are commonly parasitized by mem- 
bers of the Aulacid genus Pammegischia of which two species 
were obtained as noted on another page, without question from 
this wood-wasp. 
