726 THE BUTTERFLIES OF NEW ENGLAND. 



with a central. Inroad, black stripe, and is tipped posteriorly with blackish fuscous, sur- 

 mounted with black. Filaments cylindrical, a little appressed, especially at the base, 

 black but not purplish. Spiracles shining piceous. Legs black covered with a few 

 short, black hairs; prologs Wack above, shining black below, the ventral paii's white 

 externally. Length, 4.5 mm. ; breadth of body, 7.5 mm. ; breadth of head, 3.75 mm. ; 

 length of anterior filaments, 12-U.a mm. ; length of posterior filaments, 4.5-8 mm. ; 

 length of hairs on body, .05 mm. 



Chrysalis (83: 1-6 ). Uniform delicate pea green, somewhat beclouded by a pale, 

 silvery gleam; the abdominal segments frequently bordered with yellow, and their 

 dorsil surface, posterior to the transverse row of warts, with not infrequent fuscous 

 specks, inconspicuous even with a lens. Tips of ocellar tubercles, and the centre of 

 the first joint of the forelegs, basal wing tubercles, the two pair of tubercles on 

 the mesothorax and the raised blister-like surface at the extremity of the cell of the 

 wings, gilt. At the anterior outer edges of the first abdominal segment is a small wart, 

 having a black speck at tip. The transverse row of tubercles on the third abdominal 

 segment is situated in a tri-colored baud, anteriorly shining piceous, centrally nacre- 

 ous and posteriorly gilt, the division line of black and nacreous crossing the middle of 

 the tubercles ; terminal abdominal segment with a rather large, transverse, shining 

 piceous, dorsal spot and a pair of small, piceous, subventral spots, placed anteriorly 

 and each with a hemispherical Avart ; connecting each of them Avith the sides of the 

 cremaster is a broad, curving, shining piceous streak. Cremaster shining piceous. 

 Spiracles of the color of the body with very pale testaceous lips. Length, 27.5 mm. ; 

 length of cremaster, 3 mm. ; breadth of body at abdomen, 11.5 mm. ; at hind border 

 of metathorax, 9.75 mm. ; at basal Aving tubercle, 10.25 mm. : at ocellar tubercles, 3.5 

 mm. ; height of abdomen, 11.75 mm. ; of thorax, 9.75 mm. 



The proper name of the butterfly. By tho almost universal agree- 

 ment of those who have recently given the subject special study, this insect 

 siiould bear the specific name of plexippus. The only dissenting voice is 

 that of Aurivillius. I believe I was first to call special attention to the 

 proper specific name in my "List of the butterflies of North America, "pub- 

 lished by the BuflTalo society of natural sciences in 1878 (Bull., ii : 245). 

 This was followed directly by Strecker in 1878 in his Catalogue, in which 

 he adopted exactly the separations that I had made. INIore recently God- 

 man and Salvin in their "Biologia Centrali Americana" came to the same 

 conclusion, referring approvingly to Strecker 's distinctions. And in the 

 recent monograph of the group by Moore, the same conclusion is adopted, 

 which in brief is this : that the species was first described under the name 

 of plexippus by Linne in the tenth edition of his "Systema Naturae." 

 The description was applied only to the North American species ; that Linne 

 afterward in his Museum LudovicaeUIricae confounded with the American 

 species one from Asia ; and the two specimens now remaining in the orig- 

 inal collection are stated by Aurivillius to belong only to the Asiatic 

 species. Aurivijlius comes to the conclusion that the name of Linne 

 should be reserved for the Asiatic species ; but as he himself agrees with 

 all others that the original description referred to the American species and 

 to the American species only, there can be no reasonable doubt that the 

 name plexippus should be retained for it. MoreoAer Linne refers in the 

 original to the figures by Catesby and Sloane, the first of which refers to 



