PAPILIONIDiE. 245 



head in long columns. They are truly tropical insects, since 

 Gerstaecker mentions that three times as many species (600) 

 occur at a single point (Para, Brazil) as in all Germany, where 

 scarcely 200 species live. There are about 5,000 species known ; 

 900 inhabit North America and probably the number will be 

 increased to a thousand, while Mr. Scudder enumerates ninety- 

 five species which have already been found in New England. 



The noble genus Ornithoptera has very long, slightlj^ knobbed 

 antennae, and a well developed prothorax ; while the fore- 

 wings are very large, elongated, triangular, and the hind wings 

 are relatively smaller and rounded. 0. Priamus Linn, is found 

 in the Moluccas. There are twenty species known. The larvae 

 differ from those of Papilio in having an external forked 

 sheath for the "tentacles." The pupa is sustained by a silken 

 thread on each side, attached to a small lateral tubercle. 



Of the extensive genus Papilio, or "Swallow-tail," over 300 

 species are known. The larva is rather short and stout, with a 

 V-shaped scent-organ, or "tentacles." The pupa is supported 

 by a filament passed entirely around it. The common P. As- 

 terids Drury appears in New England in June, when it lays its 

 eggs on the leaves of parsley and other umbelliferous plants. 

 From this brood a new set of butterflies appear in August. 

 The larva is yellow, striped and spotted with black, and when 

 irritated, pushes out, from a slit in the prothoracic ring, a 

 V-shaped, yellow, fleshy, scent-organ, used as a means of de- 

 fence. The chrysalis is free, attached by the tip of the abdo- 

 men and supported by a loose silken thread, which is passed 

 over the back. It lives in this state from nine to fifteen days. 

 It has two ear-like projections on each side of the head and a 

 prominence on the back of the thorax. 



Mr. W. Saunders has received from St. John's, Newfound- 

 land, several specimens of a butterfly, one of which I have before 

 me, and which seems to be a very remarkable variety of P. 

 Asterias, rather than a distinct and undescribed species, as 

 supposed by my friend to whose collection it belongs, Ke 

 writes me, after giving a detailed description, presented below,* 



* " Papilio brevicauda Saunders. Female. Expands three and one-fifth inches ; 

 head, palpi and antennae blaclj; thorax black, fringed with yellow hairs on each 

 side, for about half its length ; body above blacls, with a row of seven or eight 

 yellow spots along each side which are largest about the middle of the row; under 



