2. "32 THE CANADIAN ENTOMOLOGIST. 



SPECIES. 



I)ifir]niU (riien., Noct, i, p. 375 (1852). 



In this species the squamation is smooth ; the lobes of the collar are- 

 separated below ; the thorax is concolorous ; the anterior wings are dull 

 purple gray ; the lines and spots are all present, with the exception of the 

 claviform spot, and accompanied by distinct, even, yellow lines ; the half- 

 line parallel with the interior line ; the median lines are trapezoidal ; the 

 median shade is blackish, diffused, and curved, passing between the spots : 

 the reniform and orbicular are large, contiguous, and surrounded by pale 

 annuli ; a double row of spots on the nervules follow the exterior line :. 

 the subterminal line is distinct, even and slightly curved ; the subterminal 

 space dark, particularly near the costa ; a pale scolloped line at the base 

 of the wings. Beneath yellowish, with a common line ; on the anterior 

 wings the characteristic patch of hair is more elongated and narrower 

 than in the allied species ; on the posterior wings discal dots. 



Expanse^ 3 --3 5 ^^^- J^^- Hah., the P^astern and Middle States. I have 

 also received specimens from St. Louis (Prof. C. V. Riley.) 



This species is \ery constant, except that the ordinary spots differ in 

 their closeness to each other. It is extremely common in the Middle 

 States in July ; to the northward it becomes less abundant. 



Cynica Guen., Noct., i. p. 375 (1852). 



Niniia Guen., id., p. 76 ; candciis Guen, id. 



^ . . . .The collar rounded, well separated from the thorax ; there is 

 no oi)en space between its two lobes. It varies greatly in color from 

 light ochreous through all the shades of reddish and purple brown. The 

 thorax concolorous with the anterior wings ; the latter are rounded, pro- 

 l^ortionately shorter than in infirma ; they vary from gray, with scarcely any 

 red admixture, to deep reddish brown. The median lines are always present, 

 simple, black and irregular, accompanied by paler shade lines ; their position 

 in reference to each other varies in different specimens in some they are tra- 

 pezoidal, in others they are almost sub-parallel, and they vary to infinity 

 between these two limits. The median shade is black, diffused and arcuate, 

 always touching the base of the reniform, and approaching more or less near 

 to the exterior line. The ordinary spots are always distinct, concolorous, 

 with wliite annuli : the}- var\' in their distance from each other. The 

 orbicular is usually obli(iue, and but little smaller tlian the reniform ; in 



