20 DIURNAL LEPIDOPTERA. 



somewhat correct, yet it fails to give the splendid play 

 of colors so conspicuous in a recent specimen of the male 

 sex. It wa.s among the most rare of our butterflies until I 

 introduced into my garden a few plants of the Aristolochia 

 Sipho and Pubescens. Since then they have multiplied in 

 immense numbers. 



No. 6. — P. Troilus. — The larvae may be discovered during 

 summer, inclosed in an involucrum, formed by rolling 

 together the margins of a leaf of the sassafras or the spice 

 bush. In this they remain concealed except while occupied 

 in feeding. When they attain maturity, and are about to 

 change into a chrysalis, they forsake these temporary 

 investments. 



This species and the female of the Asterias often perplex 

 and confuse the young entomologist by their near resem- 

 blance. A little experience in rearing the two species will 

 soon enable one to detect the differences. 



No. 7. — P. Cjiesphontes. — This is the largest of our indi- 

 genous species. It has hitherto been considered exclusively 

 a southern species, where it feeds, in its larva state, on the 

 orange and lemon tree, but it is occasionally met with in this 

 vicinity. Here the larva substitutes the hercules club and 

 prickly ash for the citrus genus as its means of sustinence. 



No. 8. — PiERis Protodice. — This plain white butterfly is 

 common, though it has its favorite localities. A cabbage 

 or turnip field, or waste grounds overrun with the shepherds 

 purse are its usual resorts. The darker brown stripes on a 

 white ground, point out the male sex. A few individuals 

 may be seen during the whole season, but in September 

 they become quite -numerous. 



No. 9. — PoNTiA Oleracea. — At Madison, Wisconsin, this 

 species is very abundant. From thence to Toledo I traced 

 it, but east of the latter place it does not exist in our State, 

 at least it has never fallen under my observation. Prof. 

 Agassiz found it near Lake Superior, and I observed many 



