192 LORD WALSINGHAM. 



and Mr. Chambers (Can. Ent. ix. p. 195) writes of G. packardella ; — 

 " It is allied to superbifrorftella and swederella more closely than to any 

 other species. 



G. swederella feeds in Europe, so far as I am aware, upon oak alone ; 

 G. superb if rontella feeds, according to Dr. Clemens, on Hamamelis vir- 

 ginica (Wych hazel), according to Frey and Boll upon oak. 



Of G. packardella, Mr. Chambers writes (Can. Ent. iv. p. 27), "from 

 circumstances I suspect it to be an oak-feeding species ;" but he subse- 

 quently recognizes G. elegantella, Frey and Boll, as his G. packardella ; 

 and in answer to the doubt expressed by those authors whether their spe- 

 cies was bred from oak or maple, he writes (Cin. Quart. Journ. Sci. ii. p. 

 227) : — "I have long known the larva on maple, and last fall succeeded 

 in breeding G. packardella from it." 



There must surely be some mistake among these different observations, 

 unless the larva of G. swederella is polyphagous in America. It is not 

 clear from Chambers's description in what points G. packardella differs 

 from G. mperbif rontella in the perfect state ; nor does the description 

 of G. elegante/la appear to show any very reliable distinctive differences. 

 But I am well aware that Mr. Chambers has much better opportunities 

 for judging in this matter than I can have. His final decision will be 

 accepted by no one more readily than myself; but I hope these remarks 

 may induce him to compare his specimens with Dr. Clemens's type and 

 to express his matured opinion. 



32,33. ? (xracilaria corouiella. 



Gracilaria coroniella, Clem. Proc. Ent. Soc. Phil. ii. p. 421, v. p. 145; Tin. Nor. 

 Am. p. 243. 



These two specimens are labelled, " Bred from Betula alba." I have 

 little doubt that they belong to the species described by Dr. Clemens 

 under the above name (see Tin. Nor. Am. p. 243), from a single hiber- 

 nated specimen. 



The " small costal pale yellow spot," " a little posterior to the triangu- 

 lar patch," is not noticeable in these specimens, which agree in all other 

 respects with the description. 



This species is very nearly allied to Gracilaria stigmatei/a, Fab. 

 (Wocke, Cat. 2320), from which it differs in its paler head and thorax 

 and its somewhat narrower fore wings, also in the pale costal patch occu- 

 pying a somewhat larger proportion of the wing-surface, and being cut 

 off obtusely on the fold, not prolonged outwards in a slight point be- 

 neath. Moreover the larvae of G. stigmate/la feed upon poplar, willow, 

 and s;ill(i\v. but not (so far as I am aware) upon birch. A single speci- 



