Lithosiidae 
The head and anterior portions of the thorax are pale yellow. 
The patagia are of the same color. The thorax and the abdomen 
on the upper side are pale slaty-gray. The legs and the tip of 
the abdomen on the under side are ochreous, the middle of the 
abdomen on the under side being dark slaty-gray. The fore wing 
on the upper side is slaty-gray, with the costa evenly edged with 
pale yellow. The hind wings are translucent white. On the 
under side the wings are marked as on the upper side, but paler. 
The insect is slightly smaller than casta. It occurs in western 
Pennsylvania. The type, which is in the collection of the author, 
was taken by him in East Pittsburgh. 
Geniis PALPIDIA Dyar 
The genus is represented by only one species, so far as is now 
known. 
(i) Palpidia pallidior Dyar. (Dyar’s Palpidia. ) 
This insect, a drawing of the type 
of which is given in the annexed cut, 
has the fore wings pale ochreous, with the 
interspaces between the veins strongly 
irrorated with dark scales. The hind 
wings are whitish. It is as yet a rare 
insect in collections, and has only 
been recorded from Cocoanut Grove, in Dade County, Florida. 
Fig. 49. —Palpidia 
pallidior , ? . 
Genus LEXIS Wallengren 
ft 
The genus Lexis is of moderate size, all of the species 
referred to it, with the single exception of the one figured 
on our plate, being inhabitants of the Old World. The 
metropolis of the genus appears to be southern Asia and 
the adjacent islands. One species is recorded from Australia, 
and the species, which is the type of the genus, is found in 
East Africa. 
(1) Lexis bicolor Grote, Plate XIII, Fig. 29, $. (The 
Yellow-edged Lexis). 
Syn. argillacea Packard. 
The moth is pale slaty-grey, with the head, patagia, and 
anal tuft yellow. The fore wings are bordered on the costa 
105 
