178 JOHN B. SMITH. 



vancouverensis Hy. Edw., Pr. Cal. Ac. Sci. v, 111 ; id. vi, 93; Biitl.. Tr. Zool. 

 Soc. Lond. ix, 618, Sphinx,; Holland, Can. Ent. xviii, 103, pr. syn. 



Var. utahensis Hy. Edw., Pap. i, 115, Sphinx. 



Top of head and dorsum of thorax dark brown. Front and thorax laterally 

 light gray or whitish. The middle of the posterior part of thorax is brownish 

 gray, with black tufts at each side. Abdomen brownish gray, with a black dorsal 

 line ; laterally is a broad black band with a series of white spots not cutting the 

 band superiorly, but joining the pale under side. Beneath, the abdomen is 

 white, with a narrow ventral and two subventral darker lines. Thorax darker 

 gray, deeper anteriorly. Primaries dark, smoky brown, sometimes with a reddish 

 tinge, light gray or whitish along the costal region from the base nearly to the 

 apex and in width extending to the median vein. The outer margin is of the 

 same color, widest at the anal angle and not reaching to the apex. The brown 

 portion of the wing is covered by several very oblique, blackish brown, wavy or 

 angulated lines, which appear on the costal portion as reddish brown streaks. 

 The gray space along the outer border has a white line through the middle, par- 

 allel with the outer margin, and the space is limited within by a fine black line 

 margined with white inwardly and angulated between the veins. The discal 

 spot is represented by an oblique, fine black line, from which a double line of 

 the same color extends in along the middle of the cell, and a single one outward 

 on vein 5. An oblique apical streak extends in across the intervenular space 

 and is nearly connected with another in the space below. There are also black 

 da.shes on the dark brown portions of the wing between veins 1 and 2, 2 and 3, 

 3 and 4, and also between 5 and 6. Secondaries blackish brown, with a whitish 

 base, narrow central band and a brownish white outer border. All the fringes 

 are smoky brown. The underside of the wings is dark gray with the outer bor- 

 der and a central band toothed on the veins in the hind wings, smoky brown. 

 Primaries with a very faint reproduction of the markings of upper side. Ex- 

 pands 3.40 — 4.25 inches ; 97 — 106 mm. 



Hab. — Canada to Georgia ; westward to California ; Vaucouver ; 

 Oregon, Colorado, Utah. 



Tlie supra-anal plate of S is flattened, narrow, abruptly bent to 

 form the flat pointed hook. The inferior process is short and broad, 

 bifid at tip. The side piece is rather narrow, of the usual form. 

 The clasper is stout, broad, corneous, inwardly concave, the inferior 

 angle extended in the form of an index finger, the terminal margin 

 irregular. 



The species is readily recognizable by the contrast between the 

 costal space and the very dark ground color. As is usual in the case 

 of very widely spread species, there is some variation in size and 

 ground color. To one of the Western forms of the species Mr. 

 Edwards has a})plied the name vancouverensis. There is every inter- 

 grade between the two, and indeed si)ecimens taken in the Eastern 

 States are, I am informed, indistinguishable from typical Western 

 forms. The differences can best be appreciated by quoting Mr. 

 Edwards' description entire : 



