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Ruddy Checker-spot
Butterfly.--Of the same size as M. baroni, from which it is most easily distinguished, among other things, by the tendency of the outer row of small yellow spots near the margin of the hind wings on the upper side to become greatly reduced, and in a majority of specimens to be altogether wanting, as in the specimen figured in our plate. Expanse, male, 1.50-1.60 inch; female, 1.80 inch.
Early Stages.--For a knowledge of what is thus far known of these the reader may consult the "Canadian Entomologist," vol. xvii, p. 155. The caterpillar feeds on Scrophularia.
The range of this species is in northern California.