600 WILLIAM T. M. FORBES 



12. C. girardellus Clemens. Silver white; a bright yellow stripe from base to 

 postniediul region, below cell, in typical specimens widening and then fading out 

 at outer end; defined with a black line above; a little yellow on base of costal 

 edge ; and sometimes beyond middle also, rarely forming an angulate fascia, 

 bounded by fine black postmedial and subterminal lines; terminal line fine, black, 

 preceded by black dots on dorsal half. 25 mm. (nivihumellus Walker.) 



Common in June and July. 



Generally distributed south to Pennsylvania and Ohio. New York: Saranac 

 Inn, Newcomb, North Creek, Fentons (Lewis County), Batavia, Rock City (Cat- 

 taraugus County), Otto, Ithaca, Trenton Falls, Liberty, Big Indian Valley, Schenec- 

 tady, Nassau, New Windsor, Katonah, New York City, Fort Montgomery. 



13. C. daeckellus Haimbach. Near C. floridus, but much larger, deeper yellow- 

 brown, the veins streaked with lead-gray only; the brown line between the silver 

 cell and postmedial patch, twice as wide as a vein; terminal space more evenly 

 yellowish in color, and narrower, even, than in floridus; inner margin, below 

 A, pure white, though with diffuse upper boundary; the outer half of the inner 

 edge narrowly blackish. Terminal markings as in floridus. 27-31 mm. 



September. 



New Jersey generally; perhaps elsewhere confused with C. floridus. 



14. C. floridus Zeller. Closely similar to C. alboclavellus (and agitatellus) ; 

 apex a little more acute, with a distinct inward angle opposite the cell, at which 

 the black terminal line stops abruptly. Silver streak diverging gradually from 

 costa, and acute, as in leachellus. Inner margin silver white, but not contrasting 

 nor sharply defined; apex more contrastingly white. 22 mm. 



June and July. Caterpillar on grass. 



Atlantic States (apparently not common) to California. New York: Ithaca. 

 Very close to both alboclavellus and the European C. pascuellus, of which latter 

 it is probably a race. 



15. C. hamellus Thunberg. Fuscous; apex a little produced; silver stripe very 

 narrow, being not wider than the brown costa, outwardly; terminal dots on dorsal 

 half of wing a little elongate, followed by a fine terminal line. Hind wing grayish ; 

 inner margin not pale. 20 mm. 



August. 



Our form is very dark on the costa above the silver streak. 



Kamouraska, Quebec; Maine; Mt. Wachusett, Massachusetts (Forbes) ; Europe. 

 New York: Saranac Inn and Albany. (New York State Collection.) 



16. C. lyonsellus Haimbach. Similar to C. floridus; apex squarish; silver streak 

 almost touching the costa to beyond the middle, then abruptly leaving it, as in 

 C. bidens; no distinct silver postmedial spot; subterminal line regularly curved, 

 meeting the costa almost at right angles; terminal line not ending abruptly at 

 middle of outer margin. Subterminal and terminal spaces typically filled with 

 bright ochre. 21 mm. 



Late June. 



Ottawa, Ontario; New Jersey. 



17. C. albellus Clemens. Wliite, very rarely pale gray; outer margin some- 

 what shaded with pale yellow. Medial line dark brown, fine, strongly angled out 

 on discal fold, forming an acute tooth, obsolete on dorsal half of wing, or repre- 

 sented by some black scales. Postmedial line indicated by a costal stria; sub- 

 terminal line double, light brown, silver-filled, angled opposite the cell, where its 

 outer line may touch the margin. Fringe silver gray, with a white base on the 

 costal third, ending abruptly at the tooth of the subterminal lines. Hind wing 

 gray. 15 mm. 



June and July. Larva on grass. 

 Common in wet places. 



New York: Trenton Falls, Rock City (Cattaraugus County), Ithaca, Big 

 Indian Valley, Schenectady, Poughkeepsie, New Windsor. 



