ATAl.APIIA NOVKBORACEXSIS. l8l 



duration of the twilight. Moreover, in the same locaHty, the 

 several species do not commence to fly at the same hour, for each 

 seems to await a particular and different degree of darkness. The 

 Hoary Bat is one of the last to appear, and for this reason its 

 capture is the most difficult. In Lewis County, during the latter 

 part of June, it does not start out (excepting in deep forests and 

 dark valleys) till about 8.45 v. m., or a full hour after sunset ; while 

 in the early part of October I have killed it at 6 p. .\i., or just half 

 an hour after sundown. The following table is calculated to illus- 

 trate the above remarks : — 



Times of evening appearances of AtalapJia cinerea at Locust Grove, 

 New York, at different dates in i88j. 



Date. 



Sunset. 





First Bat Seen. 



Time 



after Sunset 



June 30, 



7.42 



o'cloc 



:k. 



8.45 



o'clock, 



63 



minutes. 



July 9, 



7.38 







8.30 





52 



<< 



July 31. 



7.21 







8.10 





49 



<< 



Aug. 3, 



7.17 







8.00 





43 



(< 



Aug. 2 1, 



6.52 







/•30 





38 



<< 



Oct. 8, 



5-30 







6.00 





30 



<( 



ATALAPHA NOVEBORACENSIS (Erxlehen) Peters. 

 Red Bat ; Nezv York Bat. 



This species ranks among the least common bats of the area 

 under consideration. I have shot it here as late as October 12th 



(1883). 



Excepting the hoary bat it is the most beautiful of its tribe, 

 being clad in a thick coat of soft, glossy fur of a bright golden-red 

 color, varying somewhat in shade, and tipped to a greater or less 

 extent with silvery white. This coloration serves, at a glance, to 

 distinguish it from all its associates. 



The Red Bat generally makes its appearance earlier in the 

 evening than the other species, evidently fancying the dusk of 



