150 JOHN B. SMITH. 



the wing; the others reach the iuterual margin. An oblique white mark from 

 apex to the outer whitish transverse line above the middle, broadening on the 

 veins, which are marked on either side for a short distance. A darker blotch 

 between this oblique line and the outer pale line between veins six and seven. 

 Secondaries reddish or rusty brown, inner margin greenish gray, outer margin 

 narrowly and often indistinctly green ; fringes white. Beneath, primaries dull 

 reddish on disc, the costa and outer margin green, marked with yellow and 

 white, imperfectly reproducing the maculation of upper side. Secondaries 

 shaded with green, yellowish and white. Expands 2.75 — 2.90 in.; 68 — 72 mm. 



Hab. — Canada to Maryland ; westward to the Mississippi. 



The side piece, unlike the others of the genus, is somewhat spinu 

 lose inwardly ; the clasjoer is comparatively long and slender, sonu- 

 what curved and pointed. 



At once our rarest and most beautiful species of the genus. It is 

 seldom taken, but not difficult to rear. The larva is greatly infested 

 by parasites, and this may account to some extent for the rarity of 

 the imago. 



Mr. Hulst gives a complete life history in " Can. Ent." x, 64. 



SPHINGIN^. 



This subfamily is distinguished by usually rather graceful form, 

 with narrow wings, the primaries not sinuate nor angulated, but 

 either evenly oblique, or slightly convex. The body is robust, the 

 head usually distinct ; their eyes are often small and lashed, and except 

 in Ellema, the tongue is long and strong ; some of the species of this 

 subfamily representing the extreme of development in this direction. 

 The palpi seldom are as prominent as in the ChcerocampmcB, and 

 often very short. The legs are very variable in length, strength and 

 proportion, and also in armature. There is a very general tendency 

 towards spinose tibiae and armed fore tarsi ; few species not being so 

 distinguished. The venation is typical and offers nothing more than 

 has been already described. There are very generally only eleven 

 veins present. 



In ornamentation this group shows a decided agreement in some 

 few points. The abdomen is almost universally banded or laterally 

 spotted — an exceptional character in the Choerocampime — the ten- 

 dency is to gray or brown shades of ground color with longitudinally 

 strigose markings or uniform transverse lines or mere dashes, while 

 in the Chcerocamplnce the tendency is to bright colors and broad 

 shades or bands as markings. These peculiarities in marking and 

 the wing form enable the student to recognize a species of this sub- 

 family at once. 



