Engel : Lepidoptera of Western Pennsylvania. 81 



3336. Euchoeca albifera Walker. 



Pittsburgh, August 4 (IMarloff); New Brighton, May 30-August 21 

 (Merrick). At light in forest. 



3337. Epirrita dilutata Denis & Schiffermuller, 

 New Brighton, October 19-28 (Merrick). Rare. 



3340. Hydria undulata Linnaeus. 



April 25-May 29; July 25-August 7. Common. The larvae live 

 in colonies on wild cherry in a web. 

 3348. Eustroma diversilineata Hiibner. 



June 20-July 24; August 5-September 16. Common. The form 

 gracilineata Guenee is equally common. 

 3350. Eustroma populata Linnaeus. 



New Brighton, June 25, 1901, one specimen (Merrick). 



Var. remotata Walker. 



New Brighton, July 4-20 (Merrick) ; Pittsburgh, June 28, 1899 

 (Engel); Millvale (Lippold). Some of these specimens have a yellow 

 ground while others are brown. Probably two of the listed varieties 

 are represented. 

 3354. Eustroma atrocolorata Grote. 



June 3-29; July 8-August 17. Common. Mr. Krautwurm has 

 reared this species on wild hydrangea. 

 3359. Rheumaptera hastata Linngeus. 



Pittsburgh, June 29 (Krautwurm, Marloff) ; New Brighton, July 

 12, 13 (Merrick, Engel). 

 3361. Rheumaptera sociata Borkhausen. 



New Brighton, May 29-August 25 (Merrick) ; Pittsburgh, May 

 27-29 (Engel). Rare in Pittsburgh, but very common at New 

 Brighton. 



3370. Percnoptilota fluviata Hiibner. 



May i8-June 7 ; July 4-August 17. Common. 



3371. Mesoleuca ruficillata Guenee. 



May 20-June 7 ; July 19-27. Common. 

 3374. Mesoleuca lacustrata Guenee. 



May 5-June 27 ; July 30-August 17. Common. 

 3376. Mesoleuca intermediata Guenee. 



April 17-May 10; July 24-August 29. Common. 

 3383. Mesoleuca persiliata Guenee. 



New Brighton, June 4-18 ; Pittsburgh, June 24 (Marloff, Kraut- 

 wurm). 



