The Butterflies of the Eastern United States and Canada - Vol. 3 is an unchanged, high-quality re...

Synopsis of the Families and Genera of North American Diptera - Exclusive of the genera of the Ne...

The Manual of North American Diptera, written by Samuel Wendell Williston and published in 1908, ...

This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may conta...

On the Diptera of St. Vincent - West Indies is an unchanged, high-quality reprint of the original...

This work has been selected by scholars as being culturally important, and is part of the knowled...

This work has been selected by scholars as being culturally important, and is part of the knowled...

This work has been selected by scholars as being culturally important and is part of the knowledg...

Manual of the Families and Genera of the North American Diptera [microform]

This work has been selected by scholars as being culturally important and is part of the knowledg...

This work has been selected by scholars as being culturally important and is part of the knowledg...

Contribution to a Monograph of the North American Syrphidae [microform]