27 



and a smaller one half-way between. Hind wings ashy brown. 

 Fringes concolorous, with a patch of very dark scales about half- 

 way on hind margin of third feather, and a few scattering scales 

 about half-way between that and the base. 



Habitat. New York, Pennsylvania, Illinois, Missouri, Texas, 

 California, Washington. Food, Thistle (Cirsium lanceolatum) . 



"Larva. Average length, 0.60. Largest in the middle of the 

 body, tapering thence each way. Color light straw yellow, greener 

 when young. Somewhat darker, partly translucent, dorsal, sub- 

 dorsal, and stigmatal lines. Two lateral rows of black spots, the 

 lower spots rather smaller and placed behind the upper ones. A 

 third row above these, and others along the back, but so small 

 that they are generally imperceptible with the naked eye, except 

 on the thoracic segments, being especially distinct on segment 2. 

 Head small, black, sometimes inclining to brown. Cervical shield 

 black, divided longitudinally in the middle by a lighter line. Cau- 

 dal plate also black. Segment 11, besides the spots above men- 

 tioned, has two transverse black marks, the posterior one the 

 largest. Thoracic legs black, the others of the same color as the 

 body. 



"Pupa. Average length, 0.45. Soft, dull yellow, with a 

 lateral dusky line each side of dorsum, and another, less distinct, 

 each side of venter. Also dusky about the head and wing- 

 sheaths." (Riley.) 



PLATYPTILIA PERCNODACTYLA. 



Platyptilus percnodactylus Wlsm., Pter. Cal. and Ore,, p. 8, Plate I., 

 fig. 7 (1880). 



Expanse of wings, 22 mm. Head and thorax pale brown ; an- 

 tennae spotted on the upper side with white and brown. Abdomen 

 brownish, paler at the base. Legs whitish, slender, slightly en- 

 larged, and tinged with brownish at the end of the segments. 

 Spurs pale. 



Fore wings pale brown with much paler blotches, one reaching 

 from the base of the fissure to the costa, another below the dark- 

 brown costal triangle and another at the base of the costal margin ; 

 a pale streak crosses the wing, parallel to the outer margin, which 

 is brownish ; a brown line at the base of the fringes, which are 

 brown except within the fissure and near the anal angle ; a few 

 brown scales near the middle of the hind margin. Hind wings 

 brown, the third feather paler than the others, and with a few 



