272 May, 



loose 8calc8 throe of the round flatfish cocoons ; one was empty, and had previously 

 contained the larva whose history had just been given ; another held a dead larva ; 

 and the third Dr. Wood kindly enclosed to me, which I received (together with an 

 infested cone) October 8th, T879. 



This round, flattish case, containing a larva, I figured on October 23rd, and kept 

 apart with a bit of an old cone quite dry of the year 1877. 



The infested cone that came with it I also kept separate. In writing to Dr. 

 Wood I expressed an opinion I had held for some time, that the small larva; I had 

 received from him late in autumn in former years could not be full grown, as they 

 did not produce a moth, though I had kept them over two years ; but that when a 

 larva came from him to me much larger than any I had before seen, more than 

 double the size of the others, that larva produced the moth. A fact which seemed 

 to point to the larval life extending over two seasons. 



To this Dr. Wood replied as follows : — 



" It seems to me the question you have raised as to the length of the larval life 

 of abietella is a very difficult matter. I told you all the larvfo do not form the 

 round cocoons, and I think it is more especially the earlier and better fed ones that 

 do not. This is in favour of your views, but against it is the unquestionable fact 

 that th.e full-fed larvse construct them. Then again, the insect I bred this summer 

 occupied just such another cocoon ; it deserted it in May, showed no desire to eat, 

 but at once began to construct an ordiiiary shaped one in which to pupate. 



" The impression conveyed to my mind by these facts has been, that at a com- 

 paratively recent time in the history of this insect it was a two years' feeder, making 

 use of these round cocoons in the first year as hibcrnacula, but that, although it has 

 now become a one year feeder, the memory of the old habit is not altogether lost, 

 and is called into action perhaps by the lateness of the season or want of nutritious- 

 ness in the food, causing the larva to be somewhat imperfectly fed. But it is an 

 intricate question." — October lUh, 1879. 



.\ NEW SPECIES OF CE AMBUS FROM COLOEADO. 

 BY T. D. A. COCKERELL. 



Mr. ITonry Edwards, of New York, lias been land enougli to 

 examine a box of moths collected by me last year, and, among several 

 other species of interest, is a Crnmhus to which he appends the note 

 " not described," and which I therefore characterize as follows : — 



Crambus VhjR, n. sp. 



Length, 9^ mill. ; alarexp.,24 mm. Primaries warm yellowish-brown, suffused 

 with a dark shade (inclining somewhat to reddisli-brown) on costa, extending over 

 about one-third of the wing. There is a slightly paler patch (1 mm. long) on the 

 costal margin near the apex. Of the area below the dark shade, the inner three- 

 eigliths is pale yellowish-brown, sprinkled with blackish and with pale scales ; beyond 

 this there is an indistinct but rather broad oblique band, composed of an inner pale 

 and an outer dark portion. I'^xtcrual to this is another band, similar in ])roportion8, 



