Lithosiidae 



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 



FIG. 



, $ -f 



the areole developed. The first 



section is represented by Crambidia pallida, and contains, in 

 addition, the species named lithosioides and uniformis by Dyar ; 

 ihe 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, $ . (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, $ . 

 (The Alleghenian Lichen-moth.) 



FIG. 48. -Crambidia casta, $ . 



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