492 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
unicornis. A doable row ofdofM] warts not so wide Apart and much larger than in 
unicornis. The dorsal bump on the seventh segment is not so high and is larger and 
thicker than in unicornis, the two terminal warts larger; in front of this hump the 
dorsal part of the body is dark green as far as the middle of the body, and it incloses 
a round brown patch in the middle of the dorsal green area. The warts on the back 
behind the hump arc larger than in unicornis. The general color is reddish brown, 
and it wants the two V-ehftped silver dorsal patches which characterize unicornis. 
Length, 10""". 
22. llttcrocampa pulverea G. and R. 
The caterpillar of this moth, according to Dr. Riley, was observed in 
Maryland feeding on the birch. See p. 160. 
23. Lochmccus sp. 
A caterpillar allied to, but very distinct from, L. manteo occurred on 
the birch in " Virginia, September 14, 1882." (Riley's MS. notes.) I 
have seen the two specimens, which are in the Department collection, 
one of which has two dark red spots on the first abdominal and two 
much larger distinct oval dark blood-red dorsal spots on the third ab- 
dominal segment, while the body is of the color of the underside of a 
birch leaf. 
24. Dryopteris irrorata Pack. 
Mr. Elliot tells me that he has likewise reared this species from the 
birch in the vicinity of New York City. 
Moth. — This species is of a bright ferruginous or brick red, dusted above with 
brown abbreviated lines and dots, but beneath clear reddish. 
Palpi and front of head of a bright rusty red, thorax and forewiugs slightly 
shaded with brown. Both pairs of wings are marked nearly alike, being crossed by 
transverse irrorations which are united into lines near the base of the wing. Within 
the middle of the wing is a slightly curved irregularly zigzag dark line, which is 
deeply sinuate in the median space. On the outer fourth of the wing is a line of the 
same color, which makes an acute angle before reaching the apex of the wing and 
then suddenly bends back upon the costa. Just beyond this line is a dark transverse 
streak which only touches the outer edge at the lower part of the apex, which is 
nearly black. On the secondaries are two parallel black somewhat zigzag lines, the 
inner being half as long as the outer one. Beneath the outer line only is reproduced, 
being straight on the forewings, but a little sinuate on the hind wings. Expanse of 
wings, 1.40 inch. 
25. Dryopteris rosea Walker. 
Mr. S. Lowell Elliott informs me that he has raised this moth from 
larvae feeding on the birch in New York. He preserved no description 
of the caterpillar. 
Moth. — Forewings very falcate, the body and basal two-thirds of both pairs of 
wings roseate brown, sometimes yellow; outer margin of the forew T ings and apex of 
hind wings rosy brown, or color of a dead leaf. Expanse of wings 27 ram . When the 
body and wings at base are yellow (as in Walker's marginata) three rosy brown lines 
cross both pairs of wings, the two basal lines being near together, the outer remote, 
with a deep rounded sinus near the costa, marked beneath nearly as above. 
