144 WILLIAM T. M. FORBES 



1. S. walshella Clemens. Male smoky; fore wing more or less contrastingly 

 mottled and dusted with whitish; translucent. 12 mm. Female smoky black, 

 rough, with sparse hair-scales. 



The larva feeds on lichens on trunks of trees. The moth is not rare but is 

 easily overlooked. 



New York and south. New York: Ithaca, Bronxville (Woodruff). 



3. CHALIA Moore 



Antennae short, broadly pectinate; abdomen conical and hairy, with large 

 genitalia exposed at the end. Fore wing triangular, with costa rather straight 

 toward base; apex rounded over, and inner and outer margins straight. Two 

 anterior radials lost; R, and R B connate or shortly stalked, forking over the apex, 

 M 2 and M 3 connate. Cu a and Cu 2 both arising from lower margin of cell. 3d A run- 

 ning into 2d A. Hind wing two-thirds as long as fore wing, but of only half the 

 area. Sc free; cell narrow in front; all the veins widely spaced, and one medial 

 lost. 



The pupa has widely separated, quadrangular maxillae and distinct mandibles, 

 as in the Hepialidae. The cremastral spines are nearly terminal but above the 

 anus; the wings of the male less than half the length of the body, obsolete in the 

 female. The abdominal segments have two toothed ridges. The case is nearly 

 cylindrical but somewhat fusiform. It is 11 mm. long, and is covered with fine, 

 dust-like material (lichens ?). 



This description is drawn up from C. rileyi, which may prove to be distinct 

 from the genus Chalia. It is more primitive than our other Psychinse. 



1. C. rileyi Heylaerts. Translucent smoky, without markings. 10-12 mm. 



The larva is flesh color; its thorax yellow, striate with dark brown, and shin- 

 ing. The moth emerges in September. 



Missouri; Jefferson County, West Virginia. 



4. EURYCYTTARUS Hampson 



(Psyche, in part) 



Male antennae very broadly plumose; tibial epiphysis quite small; one medial 

 lost in both wings (fig. 102). 



1. E. confederate Grote and Robinson. Smoky, the wings thinly but evenly 

 scaled. 15 mm. (H 41:8; 1:16, larval case.) 



The larvae feed on low plants, climbing up on the trunks of trees to pupate, 

 in the early spring. The case is fusiform; less than 25 mm. long. It is covered 

 with pieces of leaf, and so forth, running lengthwise, and, usually more than half 

 as long as the case. 



New York to Colorado and south. New York: Ithaca, New Baltimore, Staten 

 Island; Newtown, Long Island. 



5. THYRIDOPTERYX Stephens 



Male antennae broadly but stiffly pectinate, with simple, serrate apex. Hind 

 wing rounded-triangular (fig. 101), extended at anal angle; wings transparent, 

 except costae and inner margin of hind wing. 



1. T. ephemeraefonnis Haworth. Transparent and smoky. 25 mm. (H 41:12.) 



The larva feeds on various trees and shrubs, even arbor vitse and other ever- 

 greens, and is sometimes injurious. The moths emerge in late fall, and the eggs 

 hibernate. The case of the full-grown female may be nearly 50 mm. long; that 

 of the male is always much smaller. 



Connecticut to Florida. New York: Geneva (cases), Fort Edward, New Balti- 

 more, Mt. Vernon, New York City, Staten Island; general on Long Island. Not 

 hardy at Ithaca, but a pest on Long Island. 



