119 



The extremes are presented by the Labrador and Vancouver Island examples. 

 The Pacific-coast forms are larger, blacker, the tore wings more elongated 

 toward the apex than the eastern specimens, much as observed in Semiothisa 

 dispuncta (Walk.), in which the Labrador individuals are stunted, while 

 the west-coast (Vancouver Island) specimens are larger. They are paler, 

 however, than the Labrador and New England individuals. The Colorado 

 P. prunata var. lugubrata scarcely differs from the California!) and Vancouver 

 Island ones. My Labrador individual (well preserved) has already been 

 described. The Adirondack (Mount Marcy) one is very similar, but differs in 

 being of a peculiar reddish-brown tint, especially along the costa and veins. 

 The outer line between the costa and median vein is angulated outward, instead 

 of curved regularly outward, as in the Labrador example. The Adirondack 

 is very near the Labrador one, though a little browner along the veins. In 

 the Colorado and Pacific specimens, the outer line near the costa is scalloped 

 four or five times. The middle band of the fore wings is much darker than 

 the rest of the wing ; the inner and outer portions being much paler than in 

 the eastern examples. Expanse of wings of Colorado and Vancouver Island 

 specimens, 1.43 inches; of Labrador and alpine, Eastern United States, 1.25 

 inches. 



In the general style of markings, this species closely resembles C. popu- 

 late/, as remarked by Moeschler. I do not much doubt but that both have 

 come from a common stock; lugubrata being perhaps originally derived 

 from a melanotic variety of populata. 



There are, then, four forms, or varieties, of prunata, viz : the normal pru- 

 nata (fig. 47); and the vars. destinata (very near prunata), lugubrata (fig. 48), 

 and nubilata (fig. 46). 



Staudinger gives the following localities of the form prunata: Central 



and Northern Europe, excluding (!) the polar regions ; Central and Northern 



Italy; Dalmatia; Ural Mountains ; Altai Mountains ; Northern and Eastern 



Siberia. 



Petrophora leoninata Packard. Plate 8, fig. 44. 



Cidaria leoniuata Pack., Proo. Boat. Soc. N. II., xiii, 401, 1871 ; xvi, pi. 1, fig. \'A, 1874. 



4 <? and 3 .9 — This is a very small species, with long, acute palpi, and 

 male antennae ciliated as usual. The body and wings are tawny-brown, with 

 scattered patches of ochreous scales. Palpi tawny, with scattered white 

 scales. Front ochreous, with brown scales. Fore wings with three broad, 



