Critical notes on certain Pero species (Lepidoptera, Geometridae). American Museum novitates ; no. 1393

McDunnough, James H. (James Halliday), b. 1877.Grossbeck, John A. (John Arthur), b. 1883. Studies of the North American geometrid moths of the genus Pero.2005-10-062005-10-061949http://hdl.handle.net/2246/234111 p. ; 24 cm.1149554 bytesapplication/pdfen-USQL1 .A436 no.1393, 1949Pero -- Classification.Pero -- Type specimens.Grossbeck, John A. (John Arthur), -- b. 1883.Moths -- United States -- Classification.Moths -- Canada -- Classification.Moths -- Type specimens -- North America.Insects -- United States -- Classification.Insects -- Canada -- Classification.Insects -- Type specimens -- North America.Critical notes on certain Pero species (Lepidoptera, Geometridae). American Museum novitates ; no. 1393Notes on Pero speciestext