30 THE CANADIAN ENTOMOLOGIST. 



be found subject to very gradual modifications, but I do not think we can 

 afford to reject any of them, because of their relative want of stability. 

 Indeed the neuration in the Lepidoptera seems to be as useful as in the 

 Diptera, although there are certain cases (as I long ago pointed out with 

 regard to Thyridopteryx ) where it varies not only in the species, but in 

 the opposite wings of the same specimen. I think that we must regard as 

 generically distinct from Pempdia the North American species Pravella, 

 which has 8, instead of 7 veins to the hind wings (see Bull. U. S. Geol. 

 Surv. 4, 694). For this species, the structure of which I have c|uite fully 

 described, I propose the generic name Meroptera. I also find that our 

 two species, found in Texas and Colorado, and which probably mine the 

 Agave, viz., BoUii and Dentata, are distinct from the European types of 

 Zophodia, to which Prof Zeller referred Bollii, the type of the new genus 

 Megaphycis. In the structure of the palpi, shape of the wings, greater 

 size and length of body, our two large species differ strongly. 



I have also here to correct a mistake of mine in the use of the term 



" porrect " in this group as applied to the labial palpi (e. g. in Pinipestis). 



I meant by it asceiiding, whereas it appears that it is equivalent to extended 



forwards. The term appears inconvenient to use, and perhaps I am not 



alone in mistaking its sense. 



A NEW APPLE TREE PEST. 



BY CHARLES R. DODGE, WASHINGTON, D. C. 



As if the apple tree with its sixty or more insect enemies were not 

 sufficiently afflicted, a distant relative of the Canker-worm has been making 

 itself so notorious in Georgia, as to give apprehension of the total 

 destruction of apple orchards in the locality infested. The insect com- 

 plained of is Etigonia subsignaria Pack., a measuring worm which at times 

 has been a veritable nuisance upon shade trees in New York and Phila- 

 delphia. 



In pursuance of my duties as a Special Agent of the Census Office (in 

 the fruit interest), and through subsequent correspondence, the following 

 facts were obtained from Mr. Adam Davenport, of Fannin County, in the 

 State named. In his first communication, received some months since, it 

 is stated that the worm made its appearance upon Rich Mountain, a spur 

 of the Blue Ridge, about four years ago, attacking forest and fruit trees ; 



