GEOMETERS. 



191 



the middle of June, when they spin a slight 

 web between two leaves of the food-plant, 

 and therein change to CHRYSALIDS. 



The MOTH appears on the wing in June 

 and July, and is common in many parts 

 of England, Scotland, and Ireland. (The 

 scientific name is Cidaria ribesiaria.) 



361. The Chevron (Cidaria testata). 



361. THE CHEVRON. The palpi are rather 

 long, pointed, and porrected ; the antennae 

 of the male are slightly incrassated ; the fore 

 wings are rather pointed; their colour is red- 

 dish fulvous, having a gray or hoary appear- 

 ance; the fulvous is of two shades; there is a 

 basal blotch, a broad median band, and a hind- 

 marginal blotch of a brighter and more dis- 

 tinct fulvous than the interspaces. The 

 margins of these markings are clearly defined, 

 and bordered more or less distinctly with 

 white ; the basal blotch and median band are 

 slightly varied with irregular transverse lines 

 of a more intense shade : the hind wings are 

 very pale at the base, but rather darker and 

 inclining to testaceous on the hind margin ; 

 below the middle they have a slender double 

 line, the lower half of which is white ; there 

 appears to be no discoidal spot on either of 

 the wings : the head and thorax have the 

 fulvous colour of the fore wings ; the body 

 has the pale tint of the hind wings : the 

 male is much larger than the female. 



The CATERPILLAR, when full-grown, rests 

 in a straight posture, and does not fall off its 

 food-plant when disturbed ; the head is flat 

 and porrected ; the body is cylindrical, with- 

 out humps. The head is putty-coloured, 



with darker dots and reticulations; the body 

 also is putty -coloured; the back has a slender 

 median brown stripe ; the sides have two 

 dingy white stripes, the upper straight, the 

 lower undulating : the spiracles are placed 

 below the second white stripe, and are 

 intensely black ; the belly has six whitish 

 stripes, of which the median ones closely 

 approximate. The divisions of the segments 

 are marked by slender rings of a pink tinge. 

 It feeds on birch and sallow, and is full-fed at 

 the end of May, when it spins a few threads, 

 and draws together the leaves of its food- 

 plant, making a very open kind of network 

 cocoon, so open, indeed, as not in any degree 

 to hide the enclosed CHRYSALIS, which will 

 even drop out through the meshes if shaken. 

 The chrysalis is rather long, and very pointed 

 at the tail : it is of pale putty-colour, with a 

 broad conspicuous median brown stripe down 

 the thorax and body : the oblique posterior 

 margins of the thorax are also of the same 

 dark colour; the head and wing-cases are 

 dingy brown, lined with darker brown, by 

 which colour the antennae, legs, wing-rays, 

 &c., are clearly indicated : the antenna-case 

 slightly exceeds that of the wings in length : 

 on the body is a median dark stripe below, 

 corresponding with that above, and the 

 lateral region between these two stripes is 

 spotted with dark brown. 



The MOTH appears on the wing in July, and 

 occurs commonly in many parts of England, 

 Scotland, and Ireland. (The scientific name 

 is Cidaria testata.) 



362. The Northern Spinach Moth (Cidaria populata). 



362. THE NORTHERN SPINACH MOTH. The 

 palpi are rather short ; the antennae of the 



