OF WASHINGTON, VOLUME XI, 1909. 87 



Type Catalogue No. 12573, U. S. National Museum. 



Cotypes in the collections of the U. S. National Museum and 

 of the author. 



This species averages larger than C. philadelphica; it is a 

 little more robust and the markings are heavier. The head 

 and pronotum are shining blue-green, while in philadelphica 

 they are distinctly alutaceous and the color is a duller brassy 

 green. In philadelphica the inner lunule of the humerus is 

 nearly always complete, gently arcuate and more slender; it 

 encloses two widely separated slender spots and all the markings 

 are more delicate. 



C. amelia, in the imago and larva states, occurs exclusively 

 upon the alder (Aim-is rugosa) ; C. philadelphica lives only upon 

 Cornus (Cornus stolonifera Michx., Massachusetts, G. Dim- 

 mock; C. amomum Mill., vicinity of Washington, D. C., Knab). 

 In the vicinity of Washington these two species may often be 

 found in close proximity upon their respective food-plants, a 

 natural result of the habits of these two plants. 



The writer is well aware of the extensive literature which 

 deals with the species of the group to which the foregoing 

 belong. However, until our knowledge is more complete, any 

 attempt to handle this literature critically would only add to 

 the existing confusion. Certain it is that the numerous mis- 

 identifications, not only of the beetles but of the food-plants 

 as well, have made the subject a most complicated one. 



NOTES ON MICROLEPIDOPTERA, WITH DESCRIPTIONS 

 OF NEW NORTH AMERICAN SPECIES. 



BY AUGUST BUSCK. 

 Aristotelia placidella Zeller. 



Gclcchia placidella Zeller; Verb. Zoo.-Bot. Gesellsch. We-'n, xxiv, 



p. 441; pi. 12, fig. 11, 1875. 

 Aristotelia natalclla Busck; Proc. U. S. Nat. Mus., xxvn, p. 756, 



1904. 



Gelechia placidella Zeller, from Vancouver Island, has hither- 

 to been overlooked and is mentioned neither in my Gelechiid 

 revision nor in Dyar's List of North American Lepidoptera. 



The type in Lord Walsingham's collection, which I have now 

 examined, proves the above synonomy. 



Sophronia roseicrinella, new species. 



Second joint of labial palpi rosy white, exteriorly mottled trans- 

 versely with fuscous; the well-developed brush dusky; terminal joint 



