LEPIDOPTEROUS INSECTS, 23 
the upper ones, and retains the four in a hori- 
zontal situation during repose ; the antenne are 
in the form of an elongated club, those of many 
males, and sometimes both sexes, pectinated or 
serrated ; caterpillars being always provided with 
sixteen feet. 
Famity I.—Hesprri-Spninazs, Latreille. 
The antenne are always simple, with a claviform 
termination, the extremity being hooked, and 
without a tuft of scales. 
The genera are Cononis, Castnra, and Acaristus. 
Genus Casrnta, Latreille. 
Antenne with. a terminal elongated club ; palpi 
subeylindrical, adpressed, not contiguous, fur- 
nished with short scales, and distinctly three 
jointed. 
Famity II.—Spuinerss, Latreille. 
The antenne are always terminated by a small 
sealy tuft in a prismatic club, commencing near 
the middle of their length ; lower palpi broad, 
thickly covered with scales; the third joint 
smaller, and generally indistinct. 
The genera are Smerintuus, ACHERONTHIA, Spninx, 
and Macrocrossum, 
