94 JOHN B. SMITH, 



" If this be not a new species it is certainly a most remarkable 

 aberrant form of diffinis ; the total absence of the broad, black, 

 transv^erse band of upper side of abdomen is a most noticeable 

 feature, as well as the entirely red costa of all wings beneath." 



Mr. Strecker speaks afterwards of receiving additional specimens 

 from the same locality. I have seen specimens which I believe to be 

 this species, and judging from these and from Mr. Strecker's well 

 executed figure, it is merely a form of diffinis. So, too, Mr. Maassen 

 refers the species. 



H. teiiui)^ Grt., Buff. Bull, i, 4, pi. i, fig. 6, Hemaris ; id. ii, 146, 147, Ilemaris ; 



Fish., Can. Ent. xvi, 143; Grt.,* Psyche ii, 66 ; Feruakl, Sphing. 14, Hemaris; 



Holland,® Can. Ent. xviii, 101 ; Grote, Hawk Moths 26, Hemaris ; Grt., Can. 



Ent. 1887, 19, 79. 

 fumosa Strk., Lep. Rhop. et Het. 93, 1875, pi. xiii, fig. 3, Mncroglossa ; id. 140; 



Butl., Tr. Zool. Soc. Lend, ix, 518; Grt., Buff. Bull, ii, 146, 147, pr. syn. ; 



Maassen, Stett. Ent. Zeit. 1880, v, 41, p. 69, pr. syn. 

 Pale yellowish and black. The two bluish white lateral abdomiual spots evi- 

 dent against the blackish hairs of the basal segments, which latter are dorsally 

 yellow. Anal tuft black, divided by yellow central hairs. Beneath, some sparse 

 yellow hair overlies the usual abdominal vestiture. Legs black ; pectus pale 

 yellowish white ; palpi above black, beneath pale yellowish. Wings largely vit- 

 reous, with very narrow, dull blackish borders ; blackish at base as usual, and 

 partially overlaid with yellowish scales. Costal edging narrow ; the band along 

 external margin is even on its inner edge and narrower throughout than in any 

 species described from the Atlantic district. There is no perceptible red apical 

 shading; the body squammation is rather rough ; the external margins of the 

 wings are more rounded and full than in most other species of the genus. Ex- 

 pands 1.50—1.70 inches; 37 — 42 mm. 



Hab. — Eastern United States. 



In Buff. Bull, ii, 145, Mr. Grote again speaks of the s])ecies, and 

 says that in a series of imagines seen the characters ai-e inconstant, 

 except in the form of the outer marginal band. The apical stain is 

 sometimes prominently present. 



Mr. Strecker's species was based on fresh specimens which had the 

 vitreous space clothed with scales. Most of the species when first 

 from the pupa have this slight coating of scales, which is generally 

 lost with the first flutter of the wings ; in this species they adhere 

 much more strongly than usual and specimens may be taken afield 

 with the vitreous space opaque with scales. 



Mr. Grote (1. c.) also says that compared with diffinis the larva of 

 tenuis has the ventral strij)e much more distinct and well defined. 

 The general color is green, but a few brown specimens are found. 



* The star wherever used to an authority indicates that the author describes 

 the early stages, or some of them. 



