PAMrillLIDI: AMBLYSCIllTES VIALIS. 1585 



upper vertical mciiiaii stripe ; suture of triangle black. Besides this the collar of the 

 hoail, aii<l the iiiuler surface are blackisli Itrowii. Aiiteuuae pale at base, testaceous be- 

 yond, incliuliii<; the bristle, dral si)iMe reddisli testaceous; ocelli black; labrum 

 pale; mandibles testaceous, the cuttinj; surface blackisli. 



Body pallid 2;reen, the tlrst segment with the linear, transverse, broken, dorsal shield 

 black and the last segment less pallid, and fringed with some rather long, curving, 

 tapering, colorless hairs, the whole body profusely dotted with pale green dots at 

 the base of the excessively delicate and short, simple pile; spiracles pallid; legs and 

 prolegs pale green, the former with testaceous claws. 



This description was taken soon after moulting. It afterward has the same white 

 powdered ajjpearancc, including the heatl, but before this gathers the skin is so trans- 

 parent that all the organs of tlie body can be seen, the threads of some of the vessels 

 waving continuously uji and down tlie sides of the body. Length when full grown, 26 

 mm. ; lire dth of head, 1.8 mm. ; of body, 2 mm. 



Chrysalis (35 : -tO). Delicate green, deepest in color on the basal half of the abdo- 

 men, tinged with livid luteous about the head and cremaster. Front of head, except- 

 ing ocellar ribbon, rather sparsely beset with parti-colored, more or less tawny, rather 

 long, curving bristles ; frontal incisures dusky. Prothorax with a few scattered, 

 short, curving, blackish bristles on the anterior half. Thoracic spiracle testaceous. 

 Dorsum of thorax with scattered, erect bristles like those on prothorax, more abundant 

 and longer centrally than laterally. All appendages very pale green, excepting the 

 tongue beyond the wing tips, where it is faintly tinged with luteous. Abdominal 

 segmeuts covered very sparsely with short, slightly curved, pale tipped, black hairs, 

 directed backward. Cremaster very pale luteous, edged with tawny, the hooks 

 tawny. Spiracles pale luteous, elongate, obovate. Length of body, 13.75 mm. ; 

 greatest breadth, 3. 7.!> ram., length of cremastral hooks, .25 mm. 



Distribution (29:6). This butterfly, a characteristic member of the 

 Alieghuuian tuiiiia, has a wide distribution, much wider, doubtless, than 

 our present knowledge shows ; for besides being found distributed over a 

 wide area of the country in the east, extending in the northern part of its 

 rancre more than halfway across the continent, it has also been discovered 

 on the Pacific coast and far south in Texas and Florida. Its northern 

 boundaries may be indicated by the following, passing from east west- 

 ward ; Montreal, rare (Lyman), Ottawa, not uncommon (Fletcher); 

 London, Ont. (Saunders), Sudbury and Nepigon, north of Lake Supe- 

 rior (Fletcher), Illinois (Worthington), Lake Winnipeg (Edwards), Fort 

 Ellis, Manitoba (Geddes), Dakota and Montana (Edwards). Besides 

 these it has been found as far west as Davenport, lo. (Putnam), and 

 Ilhnois (Worthington). Its southern limits in eastern America are only 

 indicated by a few localities such as Cincinnati, Ohio, rare (Dury), 

 Cumberland Gap, Ky. (Dimmock), West Virginia (Edwards), Georgia, 

 not very common (Abbot) ; but I have also seen specimens from Dallas, 

 Texas (Boll), Appalachicola, Fla., not indicated on the map (Chap- 

 man), and California (H. Edwards). 



It has been found throughout almost the whole of New England, 

 though far more abundant in the southern than in the northern half, but in 

 the north it occurs at Hallowell, Me. (Miss Wadsworth), and in the 

 White Mountains (Morrison, Scudder). It has also been found in other 



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