Mr. Westwood, in his admirable Introduction to the Modern Classification of Insects, has recorded many instances of alary variation; which, however, as he does not appear to have noticed the peculiarity of island faunas, are principally in corroboration of what I have just insisted upon as the usual tendency in continents,-namely, an enlargement of the erratic powers.
"On the Variation of Species, with Especial Reference to the Insecta ; Followed by an Inquiry into the Nature of Genera"
Thomas Vernon Wollaston
The alary processes of the premaxillaries are vertically oriented in leprieurii, pearsoni, and taurinus and very slightly inclined posteriorly in buckleyi and verrucigerus.
"A Synopsis of Neotropical Hylid Frogs, Genus Osteocephalus"
Linda Trueb William E. Duellman