262 GEOGRAPHICAL DISTRIBUTION. 



than Europe, having about one fifth less butter- 

 flies ; again, while half of the European butter- 



FIG. 182. Chlorippe Herse ; a, eggs ; b, caterpillar ; c, chrysalis ; rf, upper 

 surface of male butterfly ; the dotted line at left indicates the contour of the 

 wings of the female ; nat. size (Riley). 



flies are Brush-footed butterflies [Figs. 182-185], 

 less than one third of the American* butterflies 



FIG. 183. Chlorippe Her=e; g, half grown caterpillar ; A, under surface male 

 butterfly ; i-m, the heads of caterpillars from first to fifth stage enlarged (the 

 lines at the side indicating their real length) ; n, o. top and side view of one 

 segment of caterpillar ; p. egg, x 20. the natural size at right ; g, caterpillars 

 of the size at which they hibernate (Riley;. 



* By American, in this and the folio wing places, 1 mean North 

 America east of the Great Plains. 



