FAMILY SKIPPERS. 161 



little holes tliroiigli the leaf, giving it a riddled appearance ; 

 Avhen half grown it always rests with the two ends of its 

 body bent at right angles. 



THANAOS JUVENALIS— JUVENAL'S DUSKY- WING. 



(Nisoniades juvenalis, Nisouiades enniiis.) 



Butterfly. — Upper surface of fore wings dark grayish brown, 

 paler in the female, much besprinkled with gray scales, with a 

 vitreous spot at tip of cell and a transverse series of similar spots 

 in the middle of the outer half, interrupted beyond the cell, 

 and those beneath duller, all set in a broken obscure blackish 

 band, distinct only at their margins ; hind wings cloudy blackish 

 brown, the outer half obscurely marked with slightly paler spots. 

 Under surface dark purplish brown with a grayish tinge, the 

 spots of the upper surface repeated more distinctly, and besides, 

 on tlie hind wings, a pair of small brown-edged yellowish spots 

 near upper outer angle. Expanse about If inches. 



Caterpillar. — Head with summits rounded and somewhat ele- 

 vated, varying from greenish fuscous to fawn color, heavily 

 marked on the sides with pale orange. Body naked, briefly 

 pilose, light or dark green, with slender pale - lemon lateral 

 stripes, and dotted profusely with pale yellow. Length 1 inch 

 or a little less. 



Chrysalis. — P^le or livid above, the abdomen faintly tinged 

 with salmon above and below, the metathorax slightly infuscated; 

 all the appendages in great part black or blackish fuscous, the 

 disk of the wings dark olivaceo-fuscous, the rest as in the other 

 species. Length more than ^ inch. 



Found throughout our district, except in some of the 

 northernmost portions, in open oak thickets flying vigor- 

 ously. The winter is passed as a full-fed caterpillar and 

 the species is probably both single- and double-brooded, 

 the second brood of butterflies being very much less nu- 

 merous than the first. The butterflies first appear on the 

 wing at the very beginning of May and fly until the middle 

 of Jane, being most abundant about the middle of May; 

 the second brood appears after the middle of July and flies 



