1864.] 51 



The chri/mlis is 1.25 in. long, yellowisli, marked with brown on the 

 wing-cases and most of the tubercles, and with a stigmatal brown 

 line : head-case short, bifid, beaks diverging, corrugated, reflected exter- 

 nally, with two intermediate minute tooth-like projections; dorsal region 

 to the ninth segment, ranging with the thoracic ; thoracic projection 

 slightly elevated, right-angled, with two small brown tubercles ante- 

 rior to it ; a single small humeral projection ; margins of wing cases 

 moderately angular; segments from the seventh to the twelfth inclusive, 

 with two dorsal rows of small warty tubercles, two subdorsal rows of 

 smaller, and a minute black point beneath each stigma, — the three 

 terminal segments, carinated laterally beneath, and not ending in a 

 spine. 



Papilio asterias, Fab. 



First appearance of bntfrrjl//. May 6th ; within doors, in a warm 

 room, December 13th. The middle of June, it may be seen depositing 

 its eggs, singly, upon the leaves of the parsnip, caraway and other 

 umbelliferous plants. 



The eggs are of a delicate light yellow, smooth and round, with the 

 exception of being slightly flattened where they are attached to the leaf. 



The mature larva is well known. The young larva is nearly black, 

 and very unlike its appearance after its last molting, at which time it 

 assumes its green color. 



Chri/sah's 1 in. to 1.10 in. long; head case long, with beaks nearly 

 parallel — otherwise as in turnus ; thoracic projection brown, moderately 

 elevated, descending perpendicularly in front; middle dorsal region, 

 depressed, — the ventral region opposite, correspondingly convex ; dor- 

 sal and subdorsal tubercles in number and arrangement, as in furnus. 

 but larger, approaching to spines ; wing cases projecting at their pos- 

 terior angle ; terminal segments beneath, as in turnus. (Described 

 from dead chrysalides, and the coloration consequently omitted, as in 

 several of the following species.) 



Papilio troilus, Linn. 



This is one of our most rare diurnals. and I am only acquainted with 

 its imago. I have taken it twice, the middle of June, resting on damp 

 ground ; others have been reported to me, in a neighboring locaHty, 

 where its food plant. La urns Sassa/rax. is found. 



