March, 1901] 



PSYCHE. 



179 



turned to thick stout pupae. Abdomen small 

 tapering. Dark brown, the cases a little 

 greenish. Body coarsely punctured, cases 

 shagreened as if irregularly eroded; abdomi- 

 nal segments ridged in front. Cremaster a 

 long spine, widened at base and witli two 

 recurved hooks at tip. 



Food plant probably locust (Rohiiiin pseuil- 

 iicaci'u); at least the larv.ae fed readily on 

 this plant and the moths were taken flying 

 among the trees. Eggs June loth, mature 

 larvae July loth. Single brooded, the fall 

 and winter being passed as pupa. Larvae 

 from Washington, D. C. 



THE KATYDID'S CALL IN RELA- 

 TION TO TEMPERATURE. 



The following observations on the fre- 

 quency with which the call of the Katydid 

 {^Cyytophyllus pcr!-pi(illatu$) is repeated and 

 their relation to the temperature at the time 

 were made in Milton, Mass., by Mr. Roland 

 Hayward, between August 25th and October 

 7, and are here printed from his memoranda. 

 The first column gives the date, the second 

 the temperature in degrees of the Fahrenheit 

 scale, the third the number of calls "katy- 

 did" or "she did" per minute. In all cases 

 they were counted for at least one minute. 



Aug. 26 82° 89 



27 

 28 

 29 

 30 

 31 

 Sept. I 



2 



3 



Oct. 



PROCEEDINGS OF THE CLUB. 



II January, 1901. The 217th regular and 

 24th annual meeting (since incorporation) 

 was held at 156 Brattle St., Mr. A. P. Morse 

 in the chair. 



The annual reports of the ofHcers were 

 read. The following officers were elected for 

 1901 ; secretary, Roland Hayward; treasurer, 

 Roland Hayward ; librarian, Samuel H. Scud- 

 der ; members at large of executive commit- 

 tee, A. P. Morse, S. H. Scudder. 



The annual address of the retiring presi- 

 dent, J. W. Folsom, was read, entitled: The 

 distribution of holarctic Collembola, — pub- 

 lished in full in Psyche. 



