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Species Thera otisi - Hodges#7219

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Classification of the Geometrina of North America, with descriptions of new genera and species
By George D. Hulst
Transactions of the American Entomological Society 23: 245-386, 1896

The Moths of America North of Mexico Fascicle 18.1. Geometroidea, Geometridae (Part), Geometrinae
By Douglas C. Ferguson
The Wedge Entomological Research Foundation, 1985

Geometrid Diversity in a Red Spruce Forest
By A.W. Thomas
Canadian Forest Service, 2002
A detailed study of geometrid diversity in 4 red spruce forest plots; 1 an uncut control, 2 a selection cut, 3 a strip cut, and 4 a clear cut.
Available from: Canadian Forest Service - Atlantic Forestry Centre, PO Box 4000, Fredericton, New Brunswick, Canada. E3B 5P7.
Also as a PDF document.

warning for dial-ups: the PDF verison is 7.38MB

Geometroid Caterpillars of Northeastern and Appalachian Forests
By Wagner, David; Ferguson, Douglas; McCabe, Timothy; Reardon, Richard
Forest Service, US Dept of Agriculture, 2001
Out of print and overpriced at Amazon here but Steve Nanz just left the following find: I wasn't aware that Wagner had a Geometroid caterpillar book but now that I know, I see that and have it online. … Steve Nanz, 12 March, 2014

Geometrid notes-with descriptions of new species and varieties
By L. W. Swett
Canadian Entomologist 46: 289-291 , 1914

An annotated checklist of the Missouri Geometridae (Lepidoptera)
By Roger L. Heitzman
Journal of Research on the Lepidoptera 12(3): 169-179, 1973

Miscellaneous notes and descriptions of North American Geometridae
By John A. Grossbeck
Journal of the New York Entomological Society 20: 282-292, 1912

Report on the Lepidoptera of the American Museum expedition to Arizona, 1916 (Geometridae and Epiplemidae)
By Wm. S. Wright
Bulletin of the American Museum of Natural History 42: 483-490, 1920

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