HESPEKIDI: TIIORYBES BATHYLLUS. 1435 



daut iu the posterior part of the body. There is a very faint and narrow, duslcy, dorsal 

 line, and a faint infralateral line scarcely lighter tlian the ground. Dorsal shield of 

 first thoracic segment dull black, the softer integument in front and behind it pallid, 

 ■with no sign of any brighter tint. Spiracles black. Legs black. Prolegs color of 

 body. Length of body, 23 mm. ; breadth of same, 4.5 mm. ; breadth of head, 4.5 mm. 



It differs from T. pylades in its generally darker color, in the color of the soft integu- 

 ment of tlie first thoracic segment, and .appears also to be more scabrous. 



Chrysalis (85:24). Dull greenish brown, the eyes and appendages with the 

 posterior edges of the abdominal segments, the basal wing tubercles and the veins of 

 the wings marked with fuscous brown ; a few dots of the same along the posterior 

 margin of the wing-cases. It is stouter bodied than T. pylades. Length, 23 mm. ; 

 height, 7.5 mm. After a colored drawing by Abbot. 



Distribution (27 : 7). This butterfly is a member of the Carolinian 

 fauna, where it seems to be an abundant species everywhere on the sea- 

 board as far west as Texas (Belfrage, Aaron), beyond which I have seen 

 specimens from Mazatlan (H. Edwards) and Costa Eica. It does not 

 appear to have been taken in Florida farther south than the St. John's 

 River, and it was not found by Grote at Demopolis, Ala., though 

 mentioned by Gosse from that state. In the Mississippi valley it extends 

 to northern Illinois (Worthington), Ogle Co. (Allen), Wisconsin abun- 

 dant (Hoy), Ames, lo. (Osborn), eastern Kansas (Snow) and Fort Nio- 

 brara, Neb. (Carpenter), as well as west to New Mexico (Snow). Along 

 the Atlantic coast it passes a considerable distance into the Alleghanian 

 faima, although nowhere common, having been found in West Virginia 

 (Edwards), Maryland (Wiedemeyer), New Jersey (Andrews) and New 

 York (Lintner). 



In New England it has only been taken in the Connecticut valley, 

 where it was first obtained at Springfield (Emery) afterwards at Sunder- 

 land and South Hadley (Sprague), Mt. Tom (^Morrison) and Granby, 

 Mass. (Scudder), and in New Britain, Conn. (Hulbert). 



Food plant. Smith and Abbot figure this species on Rhynchosia 

 tomentosa Torr. and Gray, and Abbot says it feeds on wild bean. Dr. 

 Chapman has found it on other herbaceous Leguminosae, as Tephrosia 

 ambigua Chapm., Centrosema virginianum Benth., and ? Lespedeza hirta 

 Ell. Doubtless its habits are nearly identical with those of the following 

 species. 



Life history. Data for establishing a history of the species are very 

 meagre and mostly due to Abbot. Apparently it is at least double 

 brooded and passes the winter in a chrysalis state. The earliest brood of 

 butterflies appears in April (April 18, 9, S. Car., Atkinson); cater- 

 pillars from their eggs become fully developed between the middle of Jime 

 and the end of July, and after passing about eleven days in the chrysalis, 

 appear again on the wing. Abbot reared the butterfly on June 24th, July 

 2nd, and August 5th. Captures that I have seen were in August. 



In the north the data are very imperfect ; all the specimens I have seen 



