L&pidopterological Contributions. 363 



margin, becoming fainter in color towards the internal angle, and 

 with an irregularly sinuate inner border. 



Caputal and thoracic parts above, dull brown with a yellowish 

 bronzed reflection, the latter more prominent on the thorax. Ab- 

 domen paler brown, shaded at base with yellowish scales, as also 

 at the anus above and beneath. Legs densely fringed and, with 

 the under thoracic parts, of a pale obscure olivaceous brown. The 

 sexes resemble each other, the male being a little the darker. 



Expanse, 8 and 2 0.80 inch. Length of body, 0.35 inch. 



Habitat. — Virginia. 



This species differs from Boisduval's figure and description 

 of Thyris vitrina, in the color of the brighter scales of the wings, 

 which is here plainly yellow and bronze, whereas they are 

 stated in the former instance to be red or reddish (" rouge" — 

 " rouge rutilant "). There are no basal marks or bands on the 

 upper surface in P. vitrina, in which the brighter markings are 

 limited to two composite external maculations, unlike the well 

 defined bands which characterize P. fasciata. The descriptions 

 of the under surface differ throughout, while the two species 

 are plainly congenerical. 



Thyris maculata, Harris, our common species from the 

 Atlantic District, is closely allied to, and strictly congenerical 

 with the European Thyris fenestrella, Scop. sp. It differs by 

 its somewhat smaller size, and by the single vitreous spot of 

 the primaries, which, in T. fenestrella, is larger and distinctly 

 geminate. The two species are representative. 



Platythyris vitrina, is sometimes included by writers on 

 European Lepidoptera, as belonging to the European fauna, 

 but oftener omitted. Dr. Boisduval states his specimens to 

 have come from Andalusia (Spain) and the United States ; he 

 also gives a description of the larva of P. vitrina, from a draw- 

 ing received from Georgia ; probably this drawing is one of 

 Abbot's, and hitherto unpublished. The species, however, has 

 not been since rediscovered here, and, as a simple theory, it 

 may not be hazarding too much if we conjecture that the spe- 



