﻿FIELD AND FOREST. 203 



rewarded with success, a repast of croton bugs, cockroackes, with large 

 flesh flies for dessert, having temped his snakeship to break his long 

 fast and show the manner in which he catches and devours his prey. 

 Since then we have seen him feed a number of times.- — C. R. D. 



Two Pupae in One Cocoon. — I found in opening some cecropia 

 cocoons lately, two pupse in one cocoon. These were of different sex, 

 and in opposite position as regarded the loose end of cocoon ; neither 

 was perfectly formed, apparently owing to their being crowded out of 

 shape in the limited space. The cocoon was one of the "loose" 

 kind ; both inner and outer cocoons and floss were uniform in texture, 

 showing no line by which the work of two larvae could be distinguished. 

 There was, however, a rudimentary division on the inside of the inner 

 cocoon at its close end, partly enclosing the abdominal end of the S 

 pupa. — C. E. Worthixgton, in Canad. Entpm. 



CORRESPONDENCE. 



The following letter received through the Smithsonian Institution, 

 we take pleasure in presenting to our readers entire: "A year or two 

 ago I read some articles in The Popular Science Monthly upon 'sing- 

 ing mice' and the question was mooted, whether they sang when in 

 their normal state of health. I had heard them sing, but had no ex- 

 perience as to what their condition was until the past six weeks. I 

 now feel sure that it is not health that inspires their song, but rather a 

 realization of the dying Swan. 



This winter our whole place became infested with the common 

 house-mouse (Mus musculus,) and after finding traps and springs of 

 no avail to abate the nuisance we at last resorted to poison, using 

 phosphorus paste for that purpose. For three or four days we con- 

 sidered even that a failure, as mousie seemed as active and ubiquitous as 

 ever; but about the fourth or fifth night every wall in the house, up 

 stairs and down, bed rooms, sitting rooms, dining room, library, par- 

 lor and halls were vocal with the sweetest twitterings. They com- 

 menced about eleven o'clock, and woke me from a sound sleep. I 

 had a few days before received some new fish for an aquarium that sits 

 in a room adjoining my bed room, and I thought I had fallen upon 

 the wonder, a musical fish. But on rising and softly approaching the 



C 



