ENTOMOLOGICAL CONTRIBUTIONS. 157 



XIV. CALENDAR OF BUTTERFLIES FOR THE YEAR 1870. 



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

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

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

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

 rition of Theclft 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 ; IV, Center ; Y, Beth- 

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

 Glen, in Warren 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 16th of June. The time of observation was 

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



The last column but partially represents the comparative abuir 

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

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

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

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

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

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

 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. Harrisii, G. Dry as, P. cardui, P. Ata- 

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

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

 was collected or recognized. 



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

 also many of those at Bath, Bethlehem and Center. 



