THE CANADIAN ENTOMOLOGIST. 133 



fluids pulsating through their canal, giving the appearance of a faint stripe 



extending the length of the body. Begins to pupate Aug. 24; to emerge, 



Sept. 22. 



Pupa is 1. 1 inches long, very active, and is able to move the anal 



segments to a greater angle with axis of the body than the preceding 



species. Slightly larger in the middle, tapering quite sharply to extremity, 



where the cremaster is made up of a two-pointed spur. Antennaj, eyes, 



and legs show out prominently ; wing-cases faintly corrugated. There is 



a distinct prominence on front of thorax indicative of the large tuft ; this 



is a strong specific character. Directly below, between the antennse, is a 



much smaller projection, consisting of two separate points, that shows an 



approach to the striking clypeal armature of the N'onagria pupie. 



Colour is brown, wing-cases a shade darker, becoming almost black at 



time for emergence. It is well to let a moth remain a day after hatching 



before mounting on the setting-board. Necopina, in common with the 

 imagoes of most boring species, is prone to become greasy ; in fact, this 

 species is " up head " in this respect, oftentimes being an unsightly object 

 before dry enough to be placed in the cabinet. 



Larvfe begin to pupate Aug. 23 ; the first emergence out of forty 

 pupse was Sept. 23. 



To sum up the factors for success with these species, we may sift 

 from the foregoing notes the following : 



Locate the larvte or an infested locality, and by a reference to the 

 dates given, a diligent search at the proper time will meet with its reward. 

 It may be hard to get ahead of ichneumon and other insect enemies, but 

 we can be the first vertebrate on the ,scene, which will mean a great deal 

 in the aggregate of the specimens obtained. 



A representation of this genus in any near degree to completeness 

 will be an addition to any collection of Noctuida; most pleasing to the 

 owner, and doubly so if that addition is the fruit of individual labour 

 in the field. , 



THE COTTONWOOD SNOW-SCALE OF NEBRASKA. 

 Chionaspis ortholobis Bruner!, subsp. nov. 

 Chionaspis ortholobis^ Ckll.; Canad. Entom., 1894, pp. 189-190. 



The Chionaspis from Nebraska, sent to me by Prof. Bruner, was 

 named in MS. in 1894 C. Brjiueri, but for reasons stated at the place 

 cited the name was suppressed. Mr. R. A. Cooley, who is doing such 

 good work in Chiofiaspis, now confirms my original opinion as to the dis- 

 tinctness oi Bruneri, except that it is still an open question whether it is 

 a good species or only a subspecies. For the present the insect may 

 stand as above named. T. D. A. Cockerell. 



