HOW TO KNOW THE BUTTERFLIES 



obscure tawny, marked with blackish brown, and with pale 

 spots. The arrangement of the spots is similar to that in the 

 preceding species, except that the outer spot in cell Cu, of 

 the fore wings is not brown and eyelike. Expanse of wings 

 two to three inches. 



The species is dimorphic ; the dimorphism affects both sexes 

 and is independent, so far as is known, of season, as there is 

 only one brood each year. The typical form, Chlorippe clyton 

 clyton, has a submarginal row of six eyelike spots on the hind 

 wings. The second form, Chlorippe clyton proserpina, differs 

 in having the hind wings darker and the submarginal row of 

 eyelike spots wanting. 



Caterpillar. — Length one and one-half inches. Head 

 pale green with spines along the sides and two large branched 

 tubercles on top. Body naked, with green, yellow and white 

 stripes extending from head to forked tail. 



Food-plant. — Hackberry. 



The tawny and gray emperors must belong to 

 a different dynasty than does the goatweed 

 emperor, for they resemble the latter in no par- 

 ticular to the unpractised eye. The front wings 

 of the tawny resemble those of the fritillaries, 

 and its hind wings remind one of the meadow- 

 browns. There is one form of the tawny em- 

 peror that has the upper side of the hind wings 

 almost solidly brown. 



The eggs are laid closely packed on a leaf, and 

 the caterpillars when they first hatch arrange 



176 



