107 



the second generation, emerged from pupae in about ten days after 

 the larvae transformed. One of the larva? captured in 1899 became 

 full fed July 8, entered the earth the following da} 7 , and issued as 

 moth July 22. Assuming the pupal stage to have lasted ten days, three 

 days were passed by the larva in inaction. 



It is obvious from the above that we have two well-marked genera- 

 tions and there is evidence also of a third generation, of few individuals. 

 Although the earliest appearance of the moths in the field was not 

 noted, it is fairty certain that they begin to issue from the pupae of the 

 over-wintered larvae during the latter half of May and continue into 

 June, depositing their eggs at this time for the first new generation, the 

 moths of which appear during the last week of July and the first week 

 of August. From the larvae of the second generation cocoons were 

 obtained August 11. In other words, larvae had reached full growth 

 early in the second week of August, and one lot had already entered the 

 earth and spun up by the end of the second week. It has already been 

 shown that larvae of the second generation pass the winter in their 

 cocoons, form the pupal condition in May, and about ten days after 

 transforming issue as adults. There is evidence that a very small per- 

 centage of these, however, issue late in August and lay eggs for a 

 small third generation, the larvae of which have been observed by Mr. 

 Keleher and the writer at the end of September and during the first 

 week of October. 



From the observed food plants it is obvious that we may expect 

 attack in the future on several other plants. The present list includes 

 morning glory, spearmint, peppermint, plum, sunflower, dahlia, and 

 hogweed, plants of different botanical families. 



NATURAL ENEMIES. 



From the first generation of this insect a number of individuals of 

 a parasitic Dipteron of the family Tachinidae were reared, all of which 

 evidently came from the cocoons. The species was referred to Mr. 

 Coquillett, who identified it as Eypostena floridensis Towns. Flies 

 issued during the last week of July. This species, as its name shows, 

 occurs in the South. Its known distribution extends from the White 

 Mountains of New Hampshire to Jamaica, W. I. It has previously 

 been recorded as a parasite of Blastobasis nubilella Zell. and Schizocera 

 ebena Nort. 



A nymph of the spined soldier-bug {Podisus spinosas Dall.) was 

 observed by Mr. Keleher in the act of attacking a full-grown larva 

 of this species the last week of September. 



REMEDIES. 



The earlier stages of this insect can doubtless be reached by a spray 

 of Paris green or oilier arsenical, as to a certain extent also the latter 



