ENTOMOLOGICAL CONTRIBUTIONS. 15 



XIV. CALENDAR OF BUTTERFLIES FOB THE YEAR 1870. 



In the following table is contained a record of seventy-three species 

 of Rliopalocera observed at six localities in the State of New York 

 on thirty -live days during the spring and summer of 1870, com 

 mencing with the 26th of April, the date of the first observed appa 

 rition of Thecla .Irus, and ending on September 22d. 



The figures immediately below the several months give the day of 

 collection or observation. Underneath these the locality is indicated 

 in roman characters, I representing Schoharie ; I Y, Center ; Y, Beth 

 lehem ; YII, Bath; Sharon Springs designated by the letter A; and 

 Glen, in AVarren county, by B. In a few instances where the appa 

 rition of fresh individuals of a new brood was noted, the date is 

 indicated by the insertion of a larger star (*). 



The greatest number of species observed in one day was twenty- 

 nine, at Center, on the Ifith of June. The time of observation was 

 visually between the hours of 10 A. M. and 2 p. M. 



The last column but partially represents the comparative abun 

 dance of the several species, its more direct import being the continu 

 ance of the brood or a succession of broods. Thus, while C. Phllodi.ee 

 is recorded on twenty-eight occasions, L. comyntas on twenty-two, C. 

 .Americana on nineteen, P. Troilus on sixteen, L. misippus on 

 fifteen, M. tJtaros on thirteen (each of these being double or triple 

 brooded), of none of them were as many individuals seen as of Thecla 

 Irus, which was observed on but eight occasions. If from this 

 comparison C. Philodice be omitted, the number of T. Irus 

 observed was at least three times as great as of any other of the 

 species. 



The single observations recorded of several of the species, viz., 

 A. Atlantis , A. Idalia, M. Harrisiij G . Dry as, P. car dm, P. Ata- 

 lanta, II. Sassacus and II. Leonardos, faithfully indicate their rarity 

 during this year at least, for of each of these but a single individual 

 was collected or recognized. 



O 



The observations at Sharon Springs are by Mr. O. Meske, as are 

 also many of those at Bath, Bethlehem and Center. 



