360 INSECTS. LEPIDOPTERA. 



hairy, variously coloured, sometimes rough with hairs or spines, and composed, be- 

 sides the head, of twelve segments, with nine stigmata on each side. The head is 

 covered with a horny skin. They feed on vegetables. 



FAMILY I. DIURNA. 



Wings always free in repose, perpendicular to the plane of po- 

 sition, and destitute of a bridle or scaly bristle at the base of 

 the inferior wings ; antennas in a great number terminated 

 in a small club or button, more or less conical or triangular ; 

 in others slender and hooked at the end. 



The insects of this family fly and feed by day. The caterpillar has sixteen feet, 

 and lives on vegetables. The pupae are almost always naked, or destitute of 

 cocoon, fixed by the posterior extremity of the body, and in many by a silky band, 

 forming a kind of half ring at the upper part of the body. 



TRIBE I. PAPILIONIDES. 



Legs with one pair of spurs or spines ; four wings, elevated per- 

 pendicularly in repose ; antennae terminated in a club, or al- 

 most filiform, without hooks at the end, with the exception 

 of one genus, in which they are setaceous and plumose in 

 one of the sexes. 



I. Third joint of the labial palpi very small and scarcely perceptible, or very apparent, 

 and furnished with scales ; hooks at the end of the tarsi projecting ; caterpillar 

 elongated, subcylindrical ; chrysalis angular. 



II. Six feet, proper for walking, or almost similar in both sexes ; chrysalis fixed by 

 a silky band and by its posterior extremity, or inclosed in a thick cocoon ; central 

 areola of the lower wings closed posteriorly. 



1. Hexapoda, 



A. Internal margin of the lower wings concave. 



Gen. PAPILIO, PARNASSIUS, THAIS. 



B. Internal margin of the lower wings arched and projecting over the abdomen to 

 form a gutter. 



Gen. COLIAS, PIERIS. 



I. The two anterior feet shorter than the others, folded, not ambulatory, in both 

 sexes, or only in the males ; chrysalis fixed by its posterior extremity, and sus- 

 pended with the head downwards ; central areola of the lower wings open poste- 

 riorly in a great number. 



A. Central areola of the lower wings always closed posteriorly ; the two anterior 

 feet, although small and folded, almost similar to the others ; lower wings in ge- 

 neral scarcely embracing the abdomen below ; labial palpi slightly elevated above 

 the hood, much separated, slender, cylindrical. 



Gen. DANAUS, IDEA, HELICONIUS, ACREA. 



B. Central areola of the lower wings open in a great number ; two anterior feet often 

 very small and concealed, or apparent and very hairy ; lower wings embracing the 

 abdomen below ; labial palpi rising above the hood, and not distant, slender and 

 cylindrical. 



a. Central areola of the lower wings open posteriorly. 



* Labial palpi either separated in their whole length, or simply at their extremity, 

 and abruptly terminated by a slender and a circular joint. 



2. Perlata. 

 Gen. CETHOSIA, ARGYNNIS. 



** Inferior palpi contiguous in all their extent, and not terminated abruptly by a 

 slender and acicular joint. 



