216 WILLIAM T. M. FORBES 



VII. Moths with fore wings white, unmarked, or shading to yellowish toward, 

 apex, not longitudinally striped or spotted; antennae simple or with slight tufts. 

 Larval cases formed of silk and leaf; posterior ends flatly compressed. Ijarvce leaf 

 miners in trees and shrubs. 



(45) C. argentialbella Chambers. 

 Alar expanse: 10-11 mm. 

 Locality : Kentucky. 

 Food plant: Unknown. 



Larval case: "Long and slender" (Chambers). Easily recognized, being 

 the only pure white species with simple antenna described 

 from the eastern United States. 



(46) C leucochrysella Clemens 

 Alar expanse: 14-15 mm. 



Locality: Eastern United States (June). 



Food plant: Castanea dentata. 



Larval case (fig. 127) : Irregular; of the pruniella type, with silken first 



case inserted in later one cut from mined portion of leaf; 



silken part grayish tinged with black; leaf part yellow or 



brownish; mouth deflected to 45 degrees; posterior end 



curved; 10-11 mm. long. 

 An easily recognized species; fairly common wherever its food plant grows. 



(47) C. viburnella Clemens. 



Alar expanse: 11.5 mm. 



Localities: Pennsylvania; Ohio (end of May). 

 Food plant: Viburnum prunifolium. 



Larval case: Of the pruniella type; upper edge with flattened, serrate, wing- 

 like projection rising about 2.5 mm. above the barrel of 

 the case; reddish brown; mouth deflected; posterior end 

 slightly curved; 10 mm. long. 



The basal joint of the antenna is somewhat more tufted than that of the other 

 species in this group. The moth, however, is easily recognized by the characters 

 given in the table. 



VIII. Moths with large projecting tuft on basal joint of antenna. Larval cases 

 of the "pistol" type (fig. 126), made of silk and frass; posterior ends never trian- 

 gularly compresssed. . Larvae external feeders on leaves or flowers of trees and 

 shrubs; never miners. 



(48) C. nigralineella Chambers. 



Alar expanse: 12-13 mm. 



Locality: Kentucky (July). 



Food plant: Unknown. Larval case found attached to stem of Juglans 

 nigra. 



Larval case: Yellow; pistol handle brown on upper side, white underneath; 

 on upper side, near mouth, a small triangular projection 

 used for attachment of case during pupation (from Cham- 

 bers' description ) . 



(49) C. tiliaefoliella Clemens. 



Alar expanse: 1414.5 mm. 



Localities: Pennsylvania; New York; Ontario, Canada (June-July). 



Food plant: Tilia (basswood). 



Larval case: Uniform black; pistol handle turned down abruptly (at right 

 angle with upper edge) ; small toothed projections about 

 middle of under edge; upper edge straight; flaps present, 

 small, appressed; mouth deflected to 45 degrees; 6.5-7 mm. 

 long. 



