Lithosiidae 
Fig. 47.— -Crambidia pallid* 
Genus CRAMBIDIA Packard 
This small genus, consisting of moths displaying delicate 
shades of slaty-gray, pale yellow, or pearly white upon their 
wings, is represented in our fauna by six species, three of 
which we figure, one of them 
being hitherto undescribed. 
The genus falls into two sec¬ 
tions, in the first being included 
those species in which there is 
no areole in the fore wing, and 
in the second those which have 
the areole developed. The first 
section is represented by Crambidia pallida, and contains, in 
addition, the species named lithosioides and uniformis by Dyar ; 
the second section is represented by Crambidia casta , and con¬ 
tains, in addition, the species named cephalica by Grote & 
Robinson, and the species herein described and named allegheni- 
ensis. The structure of the insects is sufficiently well set forth 
in the two cuts we give, which have been kindly furnished by 
Sir George F. Hampson, with the permission of the Trustees of 
the British Museum. 
(1) Crambidia pallida Packard. (The Pale Lichen-moth.) 
The moth is uniformly brownish-grey, with the hind wings 
a trifle paler than the fore wings. The wings on the under 
side are lighter than on the upper side. The species occurs 
in the northern Atlantic States. 
(2) Crambidia casta Sanborn, Plate XIII, Fig. 30, 5. (The 
Pearly-winged Lichen-moth.) 
On the under side the fore 
wings and the costal area of 
the hind wings are fuscous, 
and in some specimens the 
upper side of the wings is 
also slightly touched with pale 
fuscous. The insect appears 
to be not uncommon in Colorado and ranges thence south 
and north toward the Pacific coast. 
(3) Crambidia allegheniensis, sp. nov., Plate XIII, Fig. 31, 8 « 
(The Alleghenian Lichen-moth.) 
Fig. 48. —Crambidia casta, 8 . {■. 
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