404 The American Naturalist. [April, 
anal stigmata, forming with them the corners of an equilateral trian- 
gle, the vent representing the lower or exactly inferiorly directed 
angle. This vent consists of a circular raised portion of the integu- 
ment, rugose in appearance, of about the same diameter as either 
stigma, and with a little circular pit-like depression on top. Exactly 
ventrad of this vent is a smaller, more irregularly shaped tubercle, 
apparently situated on the tenth segment. It is hardly more than 
three times as much removed from the anal vent as that is from either 
stigma, measuring from center to center. 
_ The puparium is furnished inside with a fine, white, silken, membra- 
nous lining —C. H. TyLer Townsenp, Las Cruces, New Mexico. 
a 
