NO. 1463. REVIEW OF THE GENUS COSMOPTEBYX—BUSCK. 709 



COSMOPTERYX PULCHERRIMELLA Chambers. 



Cosmopteryx pulcherrimella Chambers, Dyar, Cat. N. Am. Lep., No. 6072. 



There is in the National Museum a series of Cosmopteryx, bred by 

 Miss M. Murtfeldt in Kirkwood, Missouri, from P/'Iea pumila and 

 rig-htly determined by Lord Walsingham in 1889 as the present spe- 

 cies. There are also two specimens determined by him from North 

 Carolina (Morrison.) I have examined identical specimens in Pro- 

 fessor Fernald's collection, Init Chambers's original type from Ken- 

 tucky is not in existence. 



The species has the following- antennae coloration: Terminal 4 joints 

 white, preceding 5 joints white, next 2 black, next 1 white, next 1 

 black, and the following 1 white. 



Miss Murtfeldt has kindly given me the following notes on the 

 larva: 



Feeds on riekweed {Pilea pumila), a succulent little plant of the nettle family, with 

 adhesive, but not urticating leaves; mining, twisting, and crumpling them. 



Larva yellowish white, subcylindrical. 



Head sliining black, with the diversions defined by narrow white lines. Cervical 

 shield broad, oblong, with fine white central line. The sutures are very deep, giving 

 the larva a moniliform aspect. 



These larvte are not confined to one mine, but may be seen wandering over the 

 leaves and stems, cutting in between the two cuticles of a leaf and covering it with 

 transparent spots of various sizes. They change to pupa under a fold of the leaf or 

 between the wrinkles or not infrequently on the surface of the ground, protected by 

 a very slight dingy cocoon. There seems to be several broods in a season. 



COSMOPTERYX CLEMENSELLA Stainton. 



Cosmopteryx demensella Stainton, Dyar, Cat. N. Am. Lep., 1903, No. 6062. — 

 BuscK, Proc. Wash. Ent. Soc, V, 1903, p. 197. 



I have examined Stainton's type of this species in the British Museum. 

 In the National Museum is an identical specimen, which is evidentl}^ 

 one of Clemens's original specimens obtained by the late Professor 

 Rile}'. Other specimens from Pennsylvania; Boston, Massachusetts 

 (Beutenmiiller); Falls Church, Virginia (Banks), and Washington, 

 District of Columbia (Busck). 



The coloration of the antenna?, counting from the tip, is thus: Last 

 5-6 joints white, next 9-10 joints black, next 8-9 white, sometimes 

 with a black dot on the third or fourth, sometimes with both these 

 joints black. 



COSMOPTERYX GEMMIFERELLA Clemens. 



Cosmopteryx geiruirtferella Clemens, Dyar, Cat. Lep. N. A., 1903, No. 6066. — 

 Busck, Proc. Wash. Ent. Soc, V, 1903, p. 197. 



Of this species the U. S. National Museum possesses a specimen, 

 which undoubtedly originally came from Clemens and which agrees 

 with his type in the Academy of Natural Sciences in Philadelphia. 



