14 



INTEODUOTIOJJ". 



according to the altitude (this species ranges from 4000 to 

 8000 ft.). The larvse hatch out about three weeks after oviposition, 

 in mild weather. In New York, Bennett observed that Anisolabis 

 maritima generally lays its eggs in the warm days of July and 

 August, and a few after the middle of September. 



Ova. 



The ova are elliptical in shape. Those of Forficula auricularia 

 are white, smooth and oval (de Geer). They are described as 

 yellowish by Taschenberg and Eiihl ; Camerauo found them 

 regularly piled in little heaps. The eggs of CheUdnra pyrenaica 

 are described by Xambeu as being 1"3 mm. long and 1 mm. in 

 diameter, ovoid in shape, yellowish, smooth and shining, imper- 

 ceptibly punctuated, with rounded poles and a resisting shell. 

 The eggs of Anisolabis maritima are described by Xambeu as ellip- 

 soid, white, and surrounded by a shiuing translucent shell ; they 

 are about 2 mm. long. A few days after oviposition the embryo 

 is visible inside the egg-shell, in the form of a crescent, and the 

 side of the egg bulges somewhat. At the end of 17 days the larva 

 emerges, but this period varies with the condition of warmth and 

 moisture. 



The egg of Diplati/s greeni is regularly elliptical, pale, pinkish 

 yellow, and shining ; 0-8 mm. long and 0"5 mm. broad. Those of 

 Anisolabis mauritanica, Luc, are of a faint yellowish white, sub- 

 spherical, from 1 to 1*2 mm. long ; the shell is smooth, thin and 

 transparent. Heymons describes the ova of Anisolabis littoi'ea, 

 White, as 3 mm. long. The number of eggs laid varies : — 



No. of eggs. 

 25 



90 



Species. 

 Bx-platys greeni (captivity) .... 



Anisolahis maritima (free) 



(captivity) . . 



(One female laid four times in a summer.) 



Anecliura bipunctata (captivity) . . 18-25 



CJielidiira pyrenaica (free) 40-45 



Forjlcula auricularia (free) .... 12-22 



Observer. 

 G-reen. 



Bennett. 



Euhl. 



Xambeu. 



Eiihl. 



Habits. 



Earwigs may be found almost everywhere out of doors. 

 Generally they shun daylight, and many species may be found 



