158 



lariislrald is siiiiiilc, smaller, and siil)aciite); the discal dot is ol'ten siiiToiindcd 

 1)V a wcll-iiiarl\rd l)liick ring (sonietiuK's the l)and is so wide lliat no rint; is 

 formed); the wing' beyond \\\v median band is dusky cinereous, where it is 

 white in /'. lorustnila : there are two parallel, dusky, scalloped lines, some- 

 limes nearly obsolete, and represented by two rows of venular black marks; 

 a distinct, white, marginal, scalloped line, ending on the costa in front of a 

 scniarish ])lack spot. The hind wings are more dusky and clouded than in 

 R. hicMsfrata, with usually less distinct lines; there are three scalloped lines 

 just l)eyoud the small discal dot, and a double, diffused, marginal band; 

 beneath, the markings are much as in R. lacustrata, but the submarginal 

 whit(; line on the tore wings is wanting. 



Length of body, (?,0.45, 9,0.40; of fore wing, i,0.b2, 9,0.52; expanse 

 of wings, 1.10 inches. 



Nahant, Mass. (Moering) ; Cambridge, Mass., July 3-21 (Moriison); 

 Broolvline, Mass., June 1, August 18 (Shurtleff) ; Albany and Sharon, N. Y. 

 (Lintner); New Jersey (Sachs); Easton, Pa. (Stultz) ; Philadelphia, I'a. 

 (Amer. Ent. Soc.) ; West Virginia, April 8 (Mead); "Canada, New York, 

 Pennsylvania" (Guenee) ; •'Saint Martin's Falls, Hud.son's Bay, Canada, Nova 

 Scotia, and New York" (Walker). 



This common species diifers from R. lacustrata, with which it is liable 

 to be eunlbuuded, in the darker-ashen wings, the three-toothed point in the 

 median Iniud, in the wing being dusky or ilesh-colored beyond this band, and 

 in" the darker hind wings. It is very near the European R. galiata (W. V.), 

 and may prove to be identical with it. 



Pheumaptera lacustrata Packard. Plate 8, tig. 74. 



ileluiiippc lamxtnilii Giicii., Pluil., ii, t'lO.'i, 1857. * 



Wall;., List U^\^. llet. Bi'. Mas., xxv, 1296, 186-^. 



(; S and (J 9. — (Tround-C(jlor white; Ijody dnll-asli. Fore wifigs with 

 two curved, wavy lines at l)ase, wilh an acute angle on the discal spac'e ; 

 between tln^ two lines, and witliin them, the wings are tinged with dull red- 

 dish-l)rown ; beyond the two basal lines is a clear white band containing two 

 or three dusky lines; the median band is heavy, black, more conspicuous 

 than usual ; it varies in width, contracting more or less just before reachin 

 the inner edge ol the wing; tlu; angle of the outer edge on the median 

 vein is simple, unidentale, ol)tus(^, sometimes subacute; above the angle the 

 band goes s1rai<fht to the costa, without anv sinus: tlu; band is limited by 



(T 



