10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



tions, U. S. Bureau of Entomology and Plant Quarantine. Published 

 records: Abrostola asclepiadis (Schifferm tiller) (Bezzi and Stein, 

 Howard and Fiske, Baer, Lundbeck) , Acronicta auricoma (Fabricius) 

 (Lundbeck), Brephos nothum (Hiibner) (Bezzi and Stein, Howard 

 and Fiske, Baer, Lundbeck), Bupalus piniarim (Linnaeus) (Baer, 

 Eidmann, Lundbeck), Dasychira pudibunda (Linnaeus) (Bezzi and 

 Stein, Howard and Fiske, Baer, Lundbeck), Drepana cultraria (Fab- 

 ricius) (Wainwright, Nygmia phaeorrhaea (Donovan) ( = E 'u r proc- 

 tis chrysorrhoea [auct. not (Linnaeus)]) (Baer, Lundbeck, Dowden), 

 Larentia autwm/rvalis (Strom) (Bezzi and Stein, Howard and Fiske, 

 Baer, Lundbeck), Liparis monacha (Linnaeus) (Baer), Loxostege 

 sticticalis (Linnaeus) (Mamonov), Porthetria dispar (Linnaeus) 

 (Bezzi and Stein, Howard and Fiske, Baer, Lundbeck, Dowden), 

 Malacosoma neustria (Linnaeus) (Bezzi and Stein, Howard and 

 Fiske, Baer, Lundbeck), Oxycesta geographica (Fabricius) (Dow- 

 den), Phlyctaenodes verticalis (Linnaeus) (Baer, Lundbeck), Por- 

 thesia similis (Fuessly) (Baer, Lundbeck), Pygaera anachoreta 

 (Fabricius) (Baer, Lundbeck), P. pigra (Hufnagel) (Bezzi and Stein, 

 Howard and Fiske, Baer, Lundbeck, Dowden), Salebria marmorata 

 (Alpheraky) (Pustovoit), Stilpnotia salicis (Linnaeus) (Brown, 

 Dowden), Sylepta ruralis (Scopoli) (Baer, Lundbeck), Thau- 

 metopoea processioned (Linnaeus) (Bezzi and Stein, Howard 

 and Fiske, Baer, Lundbeck), Hyponomeuta cognatcUa (Hiib- 

 ner) (Lundbeck), H. evonymella (Linnaeus) (Bezzi and Stein, 

 Howard and Fiske, Baer, Lundbeck), 17. padella (Linnaeus) (Bezzi 

 and Stein, Howard and Fiske, Baer, Lundbeck), H. rorella (Hiibner) 

 (Baer, Lundbeck). Dowden records it on laboratory-attacked mate- 

 rial at Budapest, Hungary, as hibernating in Oxycesta geographica, 

 Calocasia coryli, and Acronicta rumicis (Linnaeus) ; as reared on 

 laboratory-attacked material at Melrose, Mass., on Bombyx mori (Lin- 

 naeus), Euchaetias egle (Drury), and Melalopha inclusa Hiibner 

 (Farquhar and Seeley), and hibernating in M. inclusa (Dowden) . 



Remarks. — The foregoing description is based on an examination 

 of a considerable number of European reared specimens mostly from 

 Porthetria dispar. Various European specialists comment on the 

 species as varying i n color, sometimes being quite grayish. Speci- 

 mens examined that were reared from Oxycesta geographica and 

 Pygaera pigra appeared to be a deeper, duller, golden-brown and more 

 hairy or bristly. In the specimens from 0. geographica there was a 

 group of irregularly placed discal macrochaetae on the third segment. 



ZeniUia libatrix has been liberated as a parasite of the gypsy moth in 

 the northeastern part of the United States, but there is no evidence 

 indicating that the species has become established. 



Adults, May to September ; number per host, one to several ; genera- 

 tions, one, two, or more ; liberation, as larva in host pupa. 



