CHARLES W. HOOKER, 155 



them within the body of the host." This does not prevent 

 the parasite from killing the host but checks its own in- 

 crease. Investigations at the Gypsy Moth Laboratory show 

 that when the host is attacked by more than one parasite, 

 macrurus is frequently the subject of secondary parasitism. 



Hosts. 

 Apatelodes torrefacta Sm., Virginia. Riley, Ins. Life, III, p. 154. ..1890. 

 Artace punctistriga Walk. Morgan, La. Exp. Sta., Bull. 48, p. 



159 1897. 



Automeris io Fabr. Felt, Nineteenth Rept. N. Y. St. Ent., p. 



102 1904. 



Callosamia promethea T>r . Webster, Ins. Life, II, p. 383; Felt, 



Nineteenth Rept. N. Y. St. Ent., p. 103; 



Fiske and Thompson, Journ. Econ. Ent., 



II, p. 453. 



Hyphantria cunea Dr. Riley and Howard, Idem, III, p. 155 {O. 



glabratuni) 1890. 



Samia Columbia Sm. Felt, Nineteenth Rept. N. Y. St. Ent., p. 



102 1904. 



Telea Polyphemus Cram., March 8; May 8. 

 Philosamia cynthia Dr., March 8. 

 Isia Isabella, Abb. and Sm., March 8. 

 Samia cecropia L., October 2. 



Location of speciTnens. — Specimens will probably be found 

 in most collections in the United States, but certainly in the 

 following : American Entomological Society, Pennsylvania, 

 February 9 ; Michigan ; Texas ; Florida ; Mexico ; Rhode 

 Island ; Illinois. Boston Society of Natural History. New 

 York. Leland Stanford, Jr., University, Cal., June 2 and 

 June 9. Massachusetts State College, Massachusetts ; New 

 Hampshire ; Mexico. Museum of Comparative Zoology, 

 Pennsylvania ; Texas. Minnesota State College, Minnesota ; 

 Maryland. Munich Entomological Museum, New York, Sep- 

 tember 15. North Carolina State College, North Carolina. 

 New Hampshire State College, New Hampshire, May 13. 

 Rutgers College, New Jersey. New York State Museum, 

 Albany, N. Y. Pennsylvania State Museum, Pennsylvania, 

 April 12 and 19, May 16 and 25, September 13 ; New York. 

 U. S. National Museum, Washington, D. C. ; Florida; Ar- 

 kansas; Indiana; Cordoba, V. C. Mexico, January 24, 1908. 



TRANS. AM. ENT. SOC, XXX VIII. 



