204 GLEANINGS FROM NATUliE. 



stages of growth survive the winter in the places 

 mentioned, they being the most common insects noted 

 in the woods at that season. Cold has seemingly but 

 little effect on them, as they scramble away almost as 

 hurriedly when their protective shelter of bark is 

 removed on a day in mid-January with the mercury 

 at zero, as they do in June, when it registers a hun- 

 dred in the shade. 



The empty egg cases of the Pennsylvania roach are 

 very common objects beneath the loose bark of logs 

 and especially beneath the long flakes of the shell- 

 bark hickory. They are chestnut brown in color, 

 about J x J inches in size, and are much less flattened 

 than those of the Croton bug, described below. The 

 dorsal or entire edge is slightly curved or bent 

 inwards, after the fashion of a small bean. The 

 young, after hatching, evidently escape in the same 

 manner as do those of the Oriental cockroach, as no 

 break is visible in the empty capsule. 



The last of the four cockroaches to be considered is 

 the "Croton bug," Phyllodromia germanica (L.), so 

 called because it made its appearance in Xew York 

 City in numbers about the time the Croton aqueduct 

 was completed. It is a native of Central Europe, but 

 like the Oriental roach has become cosmopolitan. 



This is one of the smallest of the nine cockroaches 



known to occur in the State ; the total length being 



J inch or less. The general color is a 



The B ^ roton light brownish-yellow, the females 

 often darker. The thorax has two 

 dark brown bands, enclosing a yellowish stripe. 



The egg case of the Croton bug is very light brown, 



