102 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



The third and last paper was by Mr. August Busck which 

 follows. 



TWO MIGROLEPIDOPTERA INJURIOUS TO CHESTNUT. 



BY AUGUST BUSCK. 

 Bureau of Entomology. 



Sesia castaneae, new species. 



Labial palpi yellow on the underside; above black, sprinkled with yellow 

 scales; apical half of third joint all black. Antennae black with the tips 

 bronzy fuscous. Face bluish black with the face before the eyes broadly 

 white. Head black. Thorax metallic bluish black with two narrow lateral 

 stripes yellow; in the female also with posterior edge narrowly yellow. 

 Forewings alike in the two sexes, transparent, with bluish black scaling on 

 the veins, slightly mixed with golden yellow scales; cilia purplish black. 

 Hindwings transparent with narrow black veins and with yellow costal edge, 

 which shows through the membrane of the forewing when in natural posi- 

 tion; cilia purplish black. Abdomen deep bluish black with posterior half 

 of fourth joint yellow on the underside; in the female the extreme edges of 

 third and fourth joints are also narrowly yellow on the dorsal side; the base 

 of the abdomen laterally yellow; the inner side of the male claspers dark 

 ochreous. Legs bluish black with narrow yellow annulations at the end of 

 the joints; the tarsi of the females dusted with yellow. 



Habitat: Lynchburg, Virginia, and Snow Shoe, Pennsylvania, 

 F. C. Craighead, coll. 



Foodplant: Chestnut. 



Type: U. S. Nat. Mus. No. 15505. 



Bred from the trunks of chestnut by Mr. F. C. Craighead. The 

 fullgrown larva is about half an inch long, yellowish white with 

 light brown head and with yellowish thoracic shield and thoracic 

 legs; setae short and pale; hooks on abdominal feet in two rows 

 with from ten to twelve hooks in the posterior and from twelve to 

 sixteen in the anterior row. 



The adults emerged April 12, and May 21, 1912. 



The species is nearest in size and coloration to S. pictipes, Grote 

 and Robinson, and has been mistaken for this species, which ac- 

 cording to the earliest records is injurious to plum, cherry and 

 peach; Grote himself identified (Bull. U. S. Geol. Surv., vi, p. 287, 

 1881) the species bred by Bailey and Kellicott, from plum and 

 cherry (Can. Ent., xm, p. 7, 1881) as his S. pictipes. 



Beutenmuller records it also from chestnut, but this record was 

 undoubtedly caused by a misidentification of the present species. 

 The chestnut species may be distinguished from S. pictipes by the 



