@article {1797,
	title = {Speculations on some beetles, barriers, and climates during the Pleistocene and Pre-Pleistocene periods in some non-glaciated portions of North America},
	journal = {Systematic Zoology},
	volume = {12},
	number = {4},
	year = {1963},
	pages = {178-201},
	author = {Howden, Henry F.}
}
@article {2075,
	title = {Biogeography of North American and Mexican insects, and a critique of vicariance biogeography},
	journal = {Systematic Zoology},
	volume = {37},
	number = {4},
	year = {1988},
	month = {dec},
	pages = {366-384},
	author = {Noonan, Gerald R.}
}
