Canadinn mutomolojist. 



V.)L. XKXIX. LONDON, AUGUST, 1907. No. 8. 



STUDIES IN THE GENUS INCISALIA. 



BY JOHN H. COOK, ALBANN', N. V. 



IV. — Incisalia NIPHON. 

 (Continued from page 235.) 



The life-history of ;/^))//^;/ has been known in part for many years. 

 The eg,^, newborn larva, mature larva and chrysalis have been studied 

 and described with minute exactness, but the literature contains no mention 

 of the transitional larval stages, and I have been unable to find any record 

 of the species having been successfully carried through from egg to imago. 

 I first bred this insect in 1Q03 from caterpillars taken at Albany, and during 

 that and the two succeeding years worked out the entire life-history ; but 

 before the text was ready for publication all my notes, drawings and 

 preserved material (including exuvise, egg-shells, etc.) were destroyed by 

 fire. In 1906 other work prevented my devoting to the species as 

 much time and attention as was desirable, and the material secured for 

 study consisted of a single egg and a larva in the penultimate stage. This 

 season eggs were obtained from a female taken at Lakewood, N. J., and 

 confined over pitch pine ; some of the larvae from these have already 

 pupated, and once again the record is complete. 



The above statements are made because what follows, while drawn 

 mostly from notes and skeiches, is, in part, based upon my memory of 

 observations made some years ago. 



Time of Flight. — Species single-brooded, the butterflies appearing 

 about a week later than irtis and Henricl (at Albany not before the lolh 

 of May). They become abundant in a few days, and practically disappear 

 before the end of the first week in June, though I have the record of a 

 female which had not yet disposed of her eggs captured at Albany as late 

 as the 24th of June. Two males were taken at Lakewood as early as the 

 4th of May (1907), and on the i8th the females were observed ovipositing. 

 All other exact data on this point were lost. 



