112 MISC. PUBLICATION 188, U.S. DEPT. OF AGRICULTURE 
ZENILLIA EUDRYAE TowN. 
Host: Euthisanotia grata Hbn. 
Localities: Claremont, N.H.; Castleton, Vt.; Andover and Worthington, 
Mass.; Rouses Point, N.Y.; and Andover, N.J. 
Adults: July and August. 
Number per host: One to eight. 
Generations: One. 
Hibernation: In the puparium. 
ZENILLIA FORMOSA A. AND W. 
Host: Automeris 10 ¢ Fab. 
Localities: Many in Massachusetts, Rhode Island, Connecticut, New York, 
New Jersey, and Pennsylvania. 
Adults: May to July. 
Number per host: ine to eight. 
Generations: One. 
Hibernation: As maggot in host pupa. 
ZENILLIA FUTILIS O. S. 
Hosts: Hamadryas milberti Godt., Cynthia atalanta L., C. cardut L., Euchaetias 
egle t Dru., Nephelodes emmedonia Cram., Nycteola revayana Scop., Malacosoma 
americana Fab., M. disstria Hbn., Ennomos subsignarius Hbn. 
Localities: Many in Maine, New Hampshire, Massachusetts, New York, New 
Jersey, and Pennsylvania. 
Adults: May to June, June to August. 
Number per host: One or two. 
Generations: Two or more. 
Hibernation: As maggot in host pupa. 
ZENILLIA HELVINA Coa. 
Hosts: Amphidasis cognataria Gn., Nacophora quernaria 8S. and A., unidentified 
Geometridae. 
Localities: Many in Maine, New Hampshire, Massachusetts, Connecticut, 
New York, New Jersey, and Pennsylvania. 
Adults: Middle of June to August. 
Number per host: One to six. 
Generations: One. 
Hibernation: In the puparium. 
ZENILLIA LOBELIAE Coa. 
Host: Acronycta grisea Walk. 
Localities: Jackman, and West Forks, Maine. 
_ Adults: Late June to July. 
Number per host: One or two. 
Generations: One. 
Hibernation: In the puparium. 
ZENILLIA PROTUBERANS A. AND W. 
Hosts: Hyphantria cunea Dru., Datana integerrima G. and R., Malaccsoma 
americana Kab., M. disstria Hbn. 
Localities: Many in New England, New York, New Jersey, and Pennsylvania. 
Adults: Late April to middle of June, occasionally July. 
Number per host: One to three. 
Generations: One, occasionally a partial second. 
Hibernation: In the puparium. 
ZENILLIA RECLINATA A. AND W. 
Hosts: Diacristva virginica Fab., Estigmene acrea Dru., unidentified Arctiidae. 
Localities: Many in laine, New Hampshire, Massachusetts, Rhode Island” 
and New Jersey. 
Adults: June to October. 
Number per host: Usually 1 or 2, though in one case as many as 12. 
