674 



Pomona College Journal of Entomology 





rate, twent_v-two successive generations without crossing. To pair butterflies in 

 captivitj', they need plenty of sunshine; and to grow tlie food plant for the 

 caterpillars outside all the year around, needs a very mild winter, and we have 

 both here. My first female in this experiment I caught near Los Angeles on 

 April 25, 1909. It was very small, as are most of our butterflies which remain 



Figure 221. Junonia coenia 



A, iiorm.'il; H, C, D. I"., .spocinK-ns inlircil uiuKt liiyli loniperatiires. 



for a long time in the chrysalis ; the first generation bred in yo degrees were all 

 somewhat larger, and I have kept up the size of tiiis butterfly to the now twenty- 

 second generation. Of course they need the very best care ; it is no easy task to 

 keep the food plant always fresh for a hundred or more caterpillars to each 

 experiment, witliout too much dampness in the breeding case, which will soon 

 prove f.ital to the young c.-iterpillars. 



