61 
This is the species which has generally passed under the name of 
plagiata Wlk. (clintonti G. & R.) for the past ten years. As however, 
plagiata Wik. (1855) has been shown to be synonymous with leucos- 
tigma A. & S. and clintonii with basiflava Pack., this species is left 
without a name. 
At the present time it is the most puzzling species of the genus 
owing to the facts that its range is apparently very extended, (it is 
found in the N. E. states and southward into New York, spreading 
westward through Southern Canada to the Pacific Coast and south- 
ward along the Rocky Mts. into Utah, Colorado and New Mexico), 
that it can be differentiated into several apparently local races, and 
that the early stages are practically unknown, leaving it a matter of 
some doubt whether we are dealing with geographical forms or dis- 
tinct species. 
Owning to the kindness of Prof. T. N. Willing of Saskatchewan 
University, we have received a blown larva and two ¢ adults which 
can be definitely associated; a blown larva received from Mr. A. Gib- 
son of Ottawa, without however any definite locality or associations, 
agrees with our Saskatchewan species in all but a few minor details 
and leads us to the supposition that this may be the larva of the Eastern 
form. The larva described by Coquillett under the name of clintonti 
G. & R. and referred by Beutenmuller to plagiata Wlk. is seemingly 
very close to this larva from Ottawa; Mr. J. Doll of the Brooklyn Inst. 
Museum who saw this larva while on a visit here informs us that he 
collected a similar larva on Long Island in 1911; the resulting 2 we 
have before us and it certainly belongs to this species. 
For the above reasons it appears advisable to us to treat all these 
forms as geographical races of one variable species and leave it to 
collectors in the different localities to verify or disprove the truth of 
our statements; we characterize below three subspecies. 
(a) O. VAGANS VAGANS subsp. nov. (PI. III, Figs. 1, 2, and 4). 
é Head and collar light gray; thorax darker gray-brown; primaries in 
general appearance gray-brown with a heavy sprinkling of black scales and a 
distinct greenish tinge (faded specimens lack this); an indistinct dark basal 
half-line; basal space smoky brown; t. a. line black-brown, upright, somewhat 
waved but without prominent angles, preceded by a narrow band of olivaceous; 
median area paler than base of wing, olivaceous, whitish in costal portion with 
a large reniform outlined indistinctly in dark brown on this white patch; t. p. 
‘line rather evenly sinuate, slightly waved, outcurved around cell, bent inwards 
in submedian fold with an inward angle on vein 1; subterminal space of same 
