190 JOHN B. SMITH.* 



whitish gray, with a black dorsal line and the posterior edges of segments black, 

 usually forming complete riugs. Primaries white, with black powderings. An 

 apical, oblique black streak and a series of three oblique black shade lines from 

 the inner margin obliquely outward, reaching only to a little above the middle 

 of wing. A submarginal narrow black shade from apex nearly to hind margin 

 within anal angle. The lower half of the wing is most densely black powdered, 

 and there is an orange tint over a greater or less portion of the surface, most 

 prominent usually in the male, which also is more heavily black powdered than 

 the female. Secoudaries white, with a basal spot, a medial and a submarginal 

 narrow black band. Beneath white, powdered with black, very distinctly and 

 densely on disc of primaries, which have also an outer transverse dark band and 

 an apical streak. Secondaries with markings of upper side reproduced. Expands 

 2.75— 3 inches; 68— 75 mm. 



Hah. — Arizona. 



A very distinct and readily recognizable species, differing from all 

 the other American species by its pure white ground color. The 

 antennte are very stout, black, in the % with distinct serrations. 



The spurs of middle and hind tibite are short and weak, and the 

 fore tibiae only are sparsely spinose. The outer side of first joint of 

 fore tarsi with a series of three or four long outer spines or claws. 



I have not had a male for dissection, and the species is not common. 



S. canadensis Bd., Sp. Gen. Het. i, 93, Sphinx; Butl., Tr. Zool. Soc. Lond. 

 ix. 629,? = leucophxata; Fernald, Sphing. N. E. 43, Sphinx; Grt., Hawk 

 Moths 44, Sphinx. 

 plota Strk., Lep. Ehop. et Het. 106; id. 115, pi. xiii, fig. 13; id. 142, pr. syn. 



Head, thorax and abdomen light brownish gray. The patagife are edged with 

 black, and there is a dark line through the middle, below which the sides of the 

 thorax and head above the eyes are paler than above. Metathoracic tufts lilack. 

 The abdomen has a central black line and a broad black band more or less broken 

 by sordid white on the edges of the segments along each side. The under side 

 is lighter than above, and has a central black line and a similar one on each side 

 of the abdomen. The primaries are light brownish gray with a cluster of black- 

 ish hair-like scales at the base below the origin of vein 1. The wings are crossed 

 by several very oblique cross lines, visible only on the costa and near the base 

 of inner margin. A subterminal black line edged with whitish extends nearly 

 to the apex, followed by another within. Black dashes occur between the veins 

 as far as the apex. Secondaries pale gray, with a spot at base, a central and a 

 subterminal band dark smoky brown. The terminal space is brownish gray. 

 The under side of all the wings is brownish gray with a darker, dentate central 

 band on the middle of the secondaries. Expands 3.25—3.60 inches; 81—90 mm. 



Hub. — Newfoundland, Canada, Maine, New York, Ohio. 



This rather rare species was taken in Bangor, Me., on flowers, in 

 July, according to Prof. Fernald. Mr. Strecker figures the species 

 very accurately, and says he has heard of its being taken in various 

 parts of the country. In Mr. Hill's collection I saw a specimen taken 



