57 



side. Two short bristles arise from each of the more conspicuous 

 spots. Abdominal segments each with four somewhat elevated 

 brown spots, from which proceed single, short, backward curv- 

 ing bristles. Between the posterior pair of brown spots are two 

 smaller black ones, each of which forms the base of a very short 

 clubbed piliferous process, which turns backward, resting flat upon 

 the surface. 



"The stigmata are annulated with black, and obliquely above 

 and forward of each are two small brown dots. The lateral tufts 

 are below the stigmata, and each is composed of from seven to 

 nine long hairs, which under the lens are remot'ely pectinate. A 

 little above and back of each of these tufts is a semicircle of fine, 

 scale-like bristles. The prolegs are very short. 



" Pupa. Length, 0.25. Swollen and blunt anteriorly. Color 

 pale fulvous, with a roseate hue on dorsum. Dorsal surface beset 

 with tufts of dingy hairs, with a lateral fringe of single straight 

 hairs, which serve to secure it more firmly to the mat of silk upon 

 which it rests. Dorsum marked near the head with two large, 

 dull-brown spots and an indistinct longitudinal stripe of the same 

 color on the abdomen. On either side of the thorax is a small, 

 velvety dark-brown dot." (Murtfeldt.) 



GENUS STENOPTILIA Hub., Verz., p. 430 (1826). 



Vertex smooth ; front cone-shaped, smoothly scaled ; palpi ex- 

 tending beyond the frontal projection, the second segment some- 

 what triangular, with projecting scales above at the end, the third 

 segment very small and cylindrical. Fore wings fissured about 

 one-third of their length, the lobes narrow and with very oblique 

 outer margins, but with more or less, distinctly visible anal angles. 

 The feathers of the hind wings are dissimilar in form : the first is 

 the widest ; the second is smaller, and has a long, produced apex ; 

 the third is linear, without dark scales in the hind fringe. The 

 venation is complete, as shown on Plate III., figs. 1 and 2. 



SYNOPSIS OF THE SPECIES. 



^ ( Expanse of wings less than 15 mm., . . . . . immilio. 

 ( Expanse of wings more than 15 mm., ..... 2. 



2 < With a dark-brown streak on the middle of first lobe, . . 3. 

 I Without a dark streak on the middle of first lobe, ... 4. 

 ( First lobe of fore wings without an oblique white stripe, 

 j ptcrodactyla. 



1 First lobe of fore wings with a subterininal oblique white 

 ^ stripe, . . ,. . ^ ""'*' . . . colvradensis. 



