96 JOHN B. SMITH. 



The above is the characterization given by the describers of the 

 species. They add : " At once distinguished from S. dlffinis 1?}' the 

 greatly broader band on the external margin of primaries, which is 

 dentate on the interspaces. The form is stouter and the head wider 

 across the vertex than in S. diffiuis." 



Afterward Mr. Grote states that the species is very similar to 

 marginalis, but is larger, more robust, the marginal band much wider 

 and more strongly dentate. 



Mr. Strecker says : " These two [axillaris and marginalis'] are un- 

 questionably the same species ; the type of marginalis has the denta- 

 tions on inner edge of margin of primaries not as deeply cut as in 

 the type of axillaris, but in a number of examples all the gradations 

 between the two extremities can he found, and in one example which 

 I possess the teeth are inwardly dentate, even more than in Grote's 

 figure in Bull. Buflf*." 



I believe that Mr. Strecker is right. There is nothing but a gen- 

 eral unlikeness between the two species, which disappears when a 

 number of specimens come under observation. I have seen speci- 

 mens which agree as well with one as with the other. 



H. difliiiis Bd., Sp. Gen. i, pi. 15, fig. 2, MacroyJossa ; Harris, Sill. Jouru. 3G, 

 308, Sesia; Wlk., C. B. M. Lep. Het. viii, 81, Hesia ; Clem., Joiirn. Ac. N. Sci. 

 Phil, iv, 1859, 129, Sesia; Morris, Synopsis 18G2, 148, Sesia ; Harris, Inj. Ins. 

 Flint ed. 328, ^'^esia ; Mead,* Can. Ent. ii, 157; Grt., Buff. Bull, i, 5, pi. 1, fig. 

 8, Hem oris ; id. ii, 147, Hemaris ; Lint.,* Ent. Cent, i, 40, l^esia ; id. ii, 157; 

 Bd., Sp. Lep. Het. i, 366, Macroglossa ; Fernald,* Sphing. 14, Hemaris ; Grt., 

 Hawk Moths 26, Hemaris ; Can. Ent. 1887, xi.x. 79, Hemaris. 

 fuciformis % Sm- Abb. Ins. Ga. i, p. 85, pi. 43 ; Wlk., C. B. M. Lep. Het. viii, 

 81, pr. syn. 



Head above and thorax anteriorly olive green, inclining to yellowish on the 

 sides. A broad band of brown, bordered on each side with pale yellow, extends 

 along the top of the thorax and abdomen. Upper side of the palpi, legs and 

 under side of thorax and abdomen black, marked with pale yellow on the under 

 side of the palpi ; sides of thorax beneath the wings, front of the fore coxre, a 

 few hairs on the fore femoi-a and on the middle and hind tibise, also on the sides 

 of the middle segments of the abdomen, yellow. The lateral tufts at the end of 

 the abdomen are black, while the central one is pale brown. There are a few 

 blue scales on the hinder edge of the sides of the first two abdominal segments. 

 The primaries are transparent, with dark brown veins and have a narrow, dark 

 brownish opaque border along the costa ; a similar one on the outer margin, in- 

 terspaceally roundedly exserted on the inner side, widest at apex, where there 

 is a rust-red apical spot. There is also a brown patch on the base of the wing 

 with a narrow prolongation along the hinder border. The secondaries are trans- 

 parent, with dark brown veins, a narrow outer border and a broad inner one 



