Hanken, James 1978 Thorius sp. 25 km W of Zacachila: 6 Dec Nothing unusual: red-striped or melanistic dorsally; all but one have very faint light flecking ventrally - the exceptional animal has a solid dark venter & most have red spot on rape - exceptional animal above does not (is it the second species?) W of San Vicente Lachixio 10 Dec Presumably two species are represented as this is a sympatric locality. No obvious character allowed separation into two groups, though. However, Tom Hellington noticed that most of the animals at 13.2 W were noticeably larger than those at 15.5 km W. Are these just large gravid F's of only one species or are the two species differentiable by body size?