340 
[December 
Pyralis marginatus'\ Stephens. Cat. II, 160. I^’o. 6777 ; Hanst. Vol. IV. 
26; Wood, In. Ent. pi. 54, fig. 68; West, and Humph. Vol. II, p. 91—92. 
AnthcEcia rivulosa Guenee, Hoet. II, p. 184. PI. 9, fig. 12 ; Walker, C. B. M. 
Hoct. p. 694. 
Anterior wings dark olivaceous grey, having the powdery appear¬ 
ance of Gortj/na nitela. Basal and suhterminal spaces blackish tinged 
with olivaceous, median and terminal spaces dark grey. Median lines 
pure white, distinct, continued from costal to internal margins, the 
transverse anterior forming a single curve, the transverse posterior 
sinuate, both lines approaching below the discal space; subterniinal line 
faint, whitish, nearly straight. Beniform spot black, rounded, vague, 
often indistinct. Posterior wings dark greyish without markings. 
Under surface of anterior wings dark grey showing indistinctly a discal 
spot and subterminal line; underside of posterior wings lighter shaded 
than anterior, with a discal lunule and a darker band along the exter¬ 
nal margin ; thorax and abdomen greyish ; the sexes alike. Expanse 
i —\% inch. 
o o 
Habitat. Occurs throughout the Middle and Eastern States. I have 
seen also specimens from Maryland, Canada and New Brunswick. 
Coll. Ent. Soc. Phila. and various private collections. 
Among the numerous % and 9 individuals that I have examined 
there are no marked varieties. In a single % specimen (Coll. Ent. 
Soc. Philad.) the white median lines approach so closely, towards the 
centre of the wing, as almost to become confused. 
2. Anthoecia arcifera X Guenee, Plate 6, fig. 3. 
Anthaecia arcigera Guenee, Hoct. II, p. 184. 
Anthoecia arcigera Walker, C. B. M., Hoct. p. 694. 
Anterior wings dark olivaceous-brown, silky, the basal and subter¬ 
minal spaces ferruginous, the median space showing a blackish posterior 
ance to Mr. Stephen Calverley, Brooklyn, L. I., in whose collection this species 
is numbered 937. 
f This name has been referred doubtfully, and I must think erroneously, as 
a synonym to Asogia rabidalis S. V., by Lederer in his “ Beitrage zur Kennt- 
niss der Pyraliden.” Wien. Ent. Monat. 1863, p. 342. 
:{: “ Guenee, Rectification des doubles noms, Errata ISToct. Vol. Ill, p. 399.I 
cannot follow M. Guenee in his alterations of the specific names of other authors 
in the present group; in this instance, however, the change is made in his own 
species and should be followed. This correction was accidentally omitted on 
the accompanying Plate. 
