I Weiss and Dickersox : Insects of Rose-Mallow. 58 



June 15 several larvae partly developed were collected in this patch 

 and placed in jars for the purpose of rearing adults. At the time 

 there were no signs of parasitism, but in the course of a f 

 became evident and the majority of the larvae died. The parasite 

 spun a characteristic parchment-like cocoon, the shrivelled remains 

 of the larva frequently being left behind it. These cocoons were 

 cylindrical, 5.5 mm. long and 2 mm. wide. From them parasites 

 emerged in the course of the next few days. These were determined 

 by Mr. Gahan through the kindness of Dr. L. O. Howard as Saga- 

 ritas dubiiatus Cr 



On subsequent visits to this patch of mallows, parasitic cocoons 

 were noted. Occasionally they were found on the upper surface of 

 the leaves,, but usually on the lower surface and looselv attached. 

 Due to this latter fact many of these cocoons probably fall to the 

 ground. One thing is evident. A large number of the larvae in this 

 place were parasitized, although we did not observe similar conditions 

 in other localities. However, we did not observe larvae so abundant 

 in any other locality, and there is no doubt that similar parasitism 

 may occur when the larvae become plentiful and that this parasite 

 may be one of the natural checks of this species. 



Egg. — Diameter of base 0.5 mm. Height 0.55 mm. Subglobular, 

 slightly broader at base. Chorion sculptured with pronounced, acute, 

 blade-like ridges running from base toward apex and with a number 

 of fine transverse lines. About one-half of the twenty- four ridges 

 extend almost to micropyle and a few unite in pairs, the other half 

 extending about two thirds of the way up. Color light. Deposited 

 singly on under side of leaf, not strongly attached. 



Recently Hatched Larva. — Length 2 mm. Width of head 

 mm. Head uniform, mahogany brown, decidedly broader than any 

 other body segment. General color dirty white, with the body seg- 

 ments especially the first six. tending to be banded with brown. The 

 points which become black dots in the mature larva are more or less 

 tuberculate and bear fine, long hairs. Claws of prolegs elongate and 

 well developed, being as long as proleg itself. 



Full Grown Larva. — Length 34-36 mm. Width of he 

 mm. The following description is by Weeks: " Head and first seg- 

 ment smaller than remainder of body. Head rounded, somewhat 

 flattened on the sides, broader at bottom than at top, strongly cleft at 



