90 THE CANADIAN ENTOMOLOGIST. 



male on disseciion was found lo contain the remains of a lirsi si age 

 larya of the parasite. The remains, consisting of the chitinized 

 parts of the head, were either a mol*. skin or less probalih- what 

 was left of a larva that had died for some unaccountable reason 

 long previously. Although it did not occur to the writer to e.\- 

 amine the abdomen of the beetle for e\idence of the wound through 

 which the full-grown larva possibly had escaped, yet the e\idence, 

 if not complete, was in favor of the theory- that the host under 

 normal conditions in the field had reco\ered after becoming a 

 \ ictim of the parasite. 



During the past season further obserxations to the same cftcct 

 ha\e been made In a letter to the writer Mr. Harrison H. Smith 

 cites the case of a beetle of Cocci tiella 9-iwtata collected at Agawam, 

 Mass., which under his observations fully recovered from the 

 efifebts of parasitism and lived at least si.x weeks after the parasite 

 had issued from its bod\'. In a long series of experiments with 

 about twenty different hosts, the writer also found that beetles of 

 OUa abdominalis in five out of nine cases observed fulh- reco\ered 

 within a few days after the larxa of the parasite had marie its 

 escape. Such beetles failed to become palsied and wandered 

 away fron the cocoon, even before the construction of the latter 

 was fairly under way. (Jne beetle, a female, was noted to be 

 exceptionally active just after the parasite had issued and ran 

 about the vial as if nothing had happened. This female having 

 been mated in the meantime, began to deposit eggs after an inter- 

 val of twenty-two days. 



It occured to the writer that it ought to be possible to rear 

 a second ge.ieration of the parasite from these beetles, and the 

 experiment was tried out, consequently, with entire success in 

 two cases. The complete data of one of these experiments are as 

 follows: 



August 2nd — cT OUa abdonunalis, reared from stock collected 

 at Brownsville, Texas (M. M. High). 



August oth — Beetle exposed to parasite, the fourth generation 

 originally fron Hippodamia convergens, collected im Humboldt 

 Canyon, California (recei\ed from Harry S. Smith J. 



August 25th — Cocoon of parasite found, the beetle active. 



