Arctiidse 
is pure white. The body of the specimen on our plate is 
greasy, and hence too dark 
(2) Diacrisia latipennis Stretch, Plate XVI, Fig. 6, $. 
(The Red-legged Diacrisia.) 
The coxae and femora are pink or reddish. The insect is 
common in Pennsylvania, and the Atlantic States generally. 
(3) Diacrisia rubra Neumoegen, Plate XIV, Fig. 32, ?. 
(The Ruddy Diacrisia.) 
The habitat of this species is British Columbia, Oregon, 
and Washington. 
(4) Diacrisia vagans Boisduval, Plate XIV, Fig. 33, $, 
Fig. 34, $. (The Wandering Diacrisia.) 
Syn. pteridis Henry 'Edwards; bicolor Walker; rufula Boisduval; 
punctata Packard; proba Henry Edwards. 
The insect illustrates the phenomenon of sexual dimor¬ 
phism, the males and females being unlike in color. The 
species-makers have had some sport with it, as shown by the 
synonyms. 
Genus HYPHORAIA Hubner 
This is a sub-arctic genus, circumpolar in its distribution 
in the Northern Hemisphere. Three species occur in our terri¬ 
tory, one of which we figure. 
(1) Hyphoraia parthenos Harris, Plate XVI, Fig. 20, $. 
(The St. Lawrence Tiger-moth.) 
Syn. borealis Mceschler. 
The moth, which is one of the most beautiful in the 
family, is comparatively rare in collections. It occurs in 
northern New England, and the valley of the St. Lawrence, 
westward to Manitoba. It is occasionally found in the Catskills. 
Genus PLATYPREPIA Dyar 
One species is found in our region. It is somewhat variable 
in the style and number of the spots upon the wings. 
(1) Platyprepia virginalis Boisduval, Plate XV, Fig. 18, 
$ . Fig. 19. $ . (The Ranchman’s Tiger-moth.) 
Syn. ochracea Stretch; guttata Boisduval. 
A very beautiful insect, quite common in Colorado. 
Wyoming, and Montana, and thence ranging westward to 
northern California and the region of Puget’s Sound. 
128 
