108 PBOCEEDINGS OF THE NATIONAL MUSEUM. vol. xxi. 



anterior line is geminate, outwardly oblique, and rather even. The 

 inner portion of the line is black, the outer smoky. The transverse 

 posterior line is geminate, tlie outer portion black, the inner smoky and 

 hardly distinct, mostly relieved only by the included pale shade. There 

 is a slight brown shade just beyond the black portion of the transverse 

 posterior line, and as a whole it is quite evenly bisinuate. The median 

 shade is feebl}^ marked by an oblique shade on the costa. There is a 

 very vague, undefined, somewhat paler subterminal line and a series of 

 smoky terminal dots. The longitudinal black streak at base is dis- 

 tinct and very neatly marked, extending through and a little beyond 

 the transverse anterior line. The dagger nuirk opposite the anal angle" 

 is also very neatly defined and crosses the transverse posterior line, 

 forming a distinct pnL The ordinary spots are of good size, incom- 

 pletely ringed, a little paler than the ordinary ground color; the 

 orbicular lound or oblong; the reniform kidney shaped. Secondaries 

 white in the male, but becoming smoky outwardly in the female. 

 Beneath powdery, jnimaries smoky, secondaries almost white with a 

 more or less defined outer line and discal spot. 



Expanse, 1.50 to 1.00 inches (37 to 40 mm.). 



Habitat. — Canada; New Hampshire; Massachusetts in June; Center 

 and Albany, New York, May and June; Adirondack Mountains, New 

 York, in August; Virginia in May. 



This is a very neatly marked species which does not seem to vary 

 much. The ash-gray color is remarkably smooth and even, and the 

 markings are very neatly defined, making the insects easily recogni- 

 zable. The head is distinct, the front convex, but hardly bulging, the 

 palpi are well developed and rarely exceed the middle of the front, 

 especially in the female. This latter sex is also a little broader winged 

 than the male, and as a whole darker in color. The legs are moderately 

 developed, the tibial epiphysis being situated unusually close to the 

 base. The male genitalia resemble those of occidottalin and its neij,r 

 allies. The upper i)rocess is well developed and curved, with a distinct 

 fluger-like projection at right angles to the upper margin. 



LARVA. 



Thaxter, Psyche, 1878, II, p. 121.— Dyar, Can. Ent., 1894, XXVI, p. 17. 



Sta/je IV. — Head pale, a little brown dotted in front; width, 1.2 mm. 

 Body pale, food green ; no marks except an orange-colored patch on 

 joint 12 covering tubercles 1 and III. Hair black and white; warts 

 with central setae and crown of short hairs, concolorous; a few secon- 

 dary hairs. 



Stof/e V. — Head large, bilobed, pale behind, but thickly dotted all 

 over the front and apex with light red brown; clypeus paler, eyes black; 

 width, 2.2 mm. Body greenish white, not very opaque; a broad, dor- 

 sal, olive-green band reaching to wart II, tinged with brownish, and 

 extending from joiut 2 to the square dorsal part of joint 12; warts, 



