The Copling-Moth. 



99 



each hind wing of the males only. Sonietinics this distinguishing mark is 

 not easily seen, except with a lens. 



We have in our collection at the University over a hundred bred Gpecimens 

 of the codling-moth, 

 and while separating 

 the sexes of these by 

 the aid of the character 

 just mentioned, we ac- 

 cidentally discovered 

 that the male bore 

 another much more 

 conspicuous, yet con- 

 stant and peculiar 

 mark. In ^gure 130 

 are shown n male (on 

 the right) and a fe- 

 male mottl, twice 129. — ///;;</ 7uifi_g- of male moth, showiKg nanow black 

 natural size, as seen pencil of hairs, much enlarged. 



from beneath. It re- 

 quires but a glance to see that on the underside of each front wing 

 in the male there is a distinct, narrow, elongate, blackish spot, which is 

 entirely lacking on the female. The spots consist simply of a group of 

 blackish scales. The spot extends nearly to the base of the wing, and is 

 more distinct on some specimens, but in our experience it has always 

 been distinct enough to render it an easy matter to distinguish the males 

 at a glance, no lens being necessary. We cannot understand how this 



130. — Male {on the right) and fema'e moth, twice natural size, as se.n from 

 beneath. N^ote characteristic black spots on front wiugs of male only. 



sexual marking could have escaped the notice of entomologists for a 

 couple of centuries. Doubtless others have seen these spots, but we have 

 not been able to find the slightest hint that they might be a sexual char- 

 acteristic either in systematic or economic discussions of the insectt 



