148 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



yellowish white dashes on the terminal edge. Cilia gray with a black 

 basal line. Hindwing dark fuscous with whitish cilia. Abdomen dark 

 fuscous, each joint edged with white. Male claspers very large, covered 

 on the outside with whitish scales, on the inside with long light brown 

 hairs. Legs silvery white with broad blue bars and annulations. Alar 

 expanse: 16-19 mm. 



Habitat: MacDowell, Saskatchewan, Canada, J. C. Blumer, 

 collector; Boulder Junction, Wisconsin, S. A. Rohwer, collector. 



Foodplant: Pinus divaricata. ' 



Type: Cat. No. 18444, U. S. N. M. 



The larvae bore in the young branches and make small, round 

 resin nodes about two-thirds of an inch in diameter, (pi. VII, fig. 2). 

 When full-grown the larva is about one-half inch long, of reddish 

 color with a light brown head and thoracic shield; tubercles small, 

 shiny. 



Imago issued in captivity at Falls Church, Virginia, in early 

 March, undoubtedly considerably earlier than is the case iii 

 nature. 



Swammerdamia castaneae n. sp. 



Labial palpi dark fuscous with base and extreme tip white. Face and 

 head white. Antennae dark fuscous annulated with white and with white 

 basal joint. Thorax white, sometimes slightly dusted with fuscous and 

 with posterior tip suffused with fuscous. Forewings dark fuscous with 

 strong bluish sheen, irregularly sprinkled with white and black scales, the 

 latter tending to form indistinct, interrupted rows of black dots; a blackish 

 costal dash just above apex; apical edge and cilia strongly dark golden 

 cupreous. Hindwings dark fuscous; cilia lighter ochreous fuscous. Abdo- 

 men dark fuscous with ochreous anal tuft. Legs fuscous, tarsi annulated 

 with white. Alar expanse: 11-12 mm. 



Habitat: East River, Connecticut, Chas. R. Ely, collector, 

 and Charter Oak, Pennsylvania, W. S. Fisher, collector. 



Foodplant: Castanea dentata. 



Type: Cat. No. 18441, U. S. N. M. 



The species is close to the European S. pyrella and was wrongly 

 identified by the writer as that species from New Hampshire 

 (Proc. Ent. Soc. Wash, xm, p. 80, 1911), but is somewhat larger 

 ar>d at once distinguishable by the white thorax. 



The following are Dr. Ely's notes, which he with his usual 

 liberality has asked me to utilize: 



"Larva green, 10 mm. long. Forms a very loose, open web, 

 much like that of a spider, on the upper side of chestnut leaf. 

 The larva appears to the naked eye to be marked by transverse 

 bands of darker green by reason of the darker shade at the points 

 of the segments. Each segment has an indistinct dorsal streak 



