106 



During- August, 1898, Mr. Canatse}?^ reported injury to cultivated 

 mornino-ulory at Georgetown, D. C, which upon the receipt of .speci- 

 mens proved to be due to this species. 



During the second and third weeks of the following June Mr. Kele- 

 her brought numbers of the larva% which from their peculiar colora- 

 tion and markings are readily distinguishable, found on spearmint 

 {MentJia ^j^icata) growing in this city. Captures were made mostly 

 toward dark, and hirvai were sometimes found at large upon the leaves, 

 but more often in rolled-up leaves. Larvse were also taken on morning- 

 glory in the same neighl)orhood, but appeared to prefer mint. Later 

 specimens were found l)y Mr. Keleher, July 5, feeding on the leaves 

 of a young plum tree, and still later, up to September 28, larvae were 

 brought by him to this office found on morning-glory in this city and 

 Alexandria, Va. July S the writer observed this species at work in a 

 bed of cultivated peppermint {Mentha pi/perita) at Cabin John, Md. ; 

 August 21 he found larva? feeding upon the rough hogweed {Amaran- 

 thus retroflexus) on the Department grounds; October 2 larva? were 

 observed on the same plant at Marshall Hall, Md., the leaves of which 

 they cut in the same manner as the more useful plants. Morning- 

 glory growing in the immediate vicinity was not noticed to be attacked. 



LIFE HISTORY. 



Moths that were placed in confinement, in the same manner as other 

 species that have thus been successfully treated, failed to deposit eggs, 

 and this stage was unfortunately missed. 



From the lot of larva? taken in August, 1881, moths began to issue 

 May 28 of the following year, continuing till June 5. 



The 1888 lot gave out moths Fe])ruary 11, 25, and March 9. This 

 lot was evidently kept in an overheated loom, which will account for 

 what must be considered the premature appearance of the adults. 



The larva? taken in August, 1898, fed f reelj' upon leaves of morn- 

 ing glory, with which they were confined, becoming full grown 

 toward the end of that month. August 30 one of these formed its 

 cocoon, in which it remained as larva until May 1 of the following 

 year, when it transformed to pupa. The imago issued May 2.5, other 

 moths continuing to issue until June 3. 



The quiescent stage of the larva had thus lasted a little over eight 

 months, and the pupal stage had lasted three weeks. 



The remaining larvt\? ceased feeding by September 8. 



The first moth from the larvte obtained in 1899, during June, was 

 found to have issued early, June 5, the remainder issuing a few days 

 afterwards. That there is considerable variation in the time of issu- 

 ance was shown that year b}" our rearings, moths being present in our 

 rearing jars as late as August <>. 



According to Professor Bogue's obs(>rvations, moths, evidentlv of 



