COLEOPTERA. 
437 
versa!, and as well as the scutel, pectus and one pair of legs red- 
dish; head, elytra and abdomen black; the two last annuli of 
the body yellowish ; wings to both sexes 
In our second division of the Lampyrides, the antennae are very 
remote at base ; the head is neither prolonged nor narrowed ante- 
riorly in the form of a snout, and the eyes are of an ordinary size in 
both sexes. 
Drilus, Oliv. — Ptilinus, Geoff. Fab. 
The males are winged, and the inner side of the antennae, from 
the fourth joint, is prolonged like the tooth of a comb. Those of 
the females are shorter, somewhat perfoliaceous and slightly ser- 
rated. The maxillary palpi in both sexes are thicker towards the 
end, and terminate in a point. The inner side of the mandibles pre- 
sents a tooth. 
The female of the species, which is the type of the genus, and 
whose male is tolerably common, remained unknown until lately, as 
well as the metamorphoses of both sexes. Certain observations 
made at Geneva, by Count Mielzinsky, on the larva of this Insect 
and the perfect female, excited the attention of two able French na- 
turalists, MM. Desmarest and Victor Audouin. The latter had 
received from the author of the discovery several living larvae, 
which were found in the shell of a Helix nemoralis of Linnaeus, and 
which together with the perfect female, the only sex he had obtained 
in that state, were described by him. But he was mistaken in con- 
sidering as pupae, larvae which had attained their full groAVth, and 
which pass the winter in the interior of these shells. In this 
state, these Insects are tolerably similar to the larvae of the Euro- 
pean Lampyrides, but there are a range of conical mammillae on 
each side of their abdomen, and two series of hairy tufts on other 
elevations of the same nature. The posterior extremity of the body 
is forked, and the anus is used by the animal as a means of progres- 
sion. It soon devours the legitimate owner of the shell, whence the 
genei’ic appellation of Cochleoctonus, given to this Insect by the 
naturalist above mentioned. M. Desmarest presuming that as 
these larvae were common in the neighbourhood of Geneva, they 
might also be found in the vicinity of Paris, by the aid of his pupils 
soon procured a number of them, which enabled him to give a com- 
plete history of the Insect, and to ascertain that the individuals in 
their perfect state, described by Mielzinsky, were the females of the 
Drile jaundtre or the Panache jaune, Geoff., I, 1,2; Oliv., Col. II, 
23, 1,1, the body of which is about three lines long, black, with 
yellowish elytra. The female is nearly thrice as large, is of an 
orange or reddish yellow, and resembles that of a Lampyris, but 
without its phosphorescence. M. Audouin has published its ana- 
tomy, and observed that the exuviae of the larva exactly close the 
aperture of the shell, forming a sort of operculum. While the ani- 
mal is in its larva state, it remains at the bottom of its domicil, and 
so placed, that the posterior extremity of its body faces the opening ; 
* See Fabricius, and Olivier, Col. II, No. 28 . 
