OF WASHINGTON, VOLUME XI, 1909 > 99 



tiens on Plummer's Island, Maryland, but has not yet had op- 

 portunity to breed the moths. 



Hemimene plummeriana, Busck. 



Proc. Biol. Soc. Wash., xix, p. 181, 1906. 



This interesting little species has been bred at the type local- 

 ity (Plummer's Island, Maryland), by Mr. E. A. Schwarz from 

 the flowers of pawpaw (Asiminia triloba). The larvae are 

 short, thickset, purplish or greenish white, with light-brown 

 head and brown divided cervical shield. The adults issued 

 May 16. 



This is an unusual food plant for the genus Hemimene 

 (Dichrorampha), which has been supposed to be confined to the 

 Compos itse. 



CAMERARIA Chapman. 



The Entomologist, xxxv, p. 141, 1902. 



Type Lithocolletis guttifinitella Clemens. 



Miss Annette Braun's "Revision of the American species of 

 Lithocolletis"* is a very valuable addition to the literature on 

 American microlepidoptera, and the author deserves great 

 credit for her careful work, and especially for the excellent 

 plates, which are a great help in the identification of the many 

 closely allied species of this group. The generic arrangement, 

 however, shows some lack of logic and cannot be maintained. 



The genus Lithocolletis, as understood in Dyar's List of 

 North American Lepidoptera and by the earlier American 

 workers on the group, consists, as repeatedly pointed out by 

 Clemens and Chambers, of two main divisions the cylindrical- 

 larva group and the flat-larva group. These two branches have 

 developed parallel from gracilariid stock, probably not from the 

 same but from nearly allied origin. There can clearly not 

 have been any crossings between these two branches of devel- 

 opment since the first separation ; neither could one have been 

 developed from the other. 



That the imaginal characters are structurally identical could 

 be expected; they started alike and have had the same condi- 

 tions to meet; but each group has retained its typical larval 

 development, its typical feeding habits, its peculiar cocoons, 

 and its typical coloration. In any of the stages it can at a 

 glance be decided to which of the two groups a given species 

 belongs. 



In the one of these main branches of the phylogenic tree a 



Trans. Am. Ent. Soc., xxxiv, p. 269-357, pis. xx-xxiv, 1908. 



