22 INSECTA. 
disions may retain the name of Melolonthide, and the other receive 
that of Hoplide. 
The first may be described as follows:—The number of perfect 
leaflets of the club exceeding three in several. The body extremely 
thick. Mandibles stout, whelly or mostly corneous, presenting at 
most a membranous and pilose appendage, situated in a cavity or 
emargination of the inner side; the superior extremity strongly 
truncated with two or three teeth or angular projections. All the 
tarsi terminated by two crotchets; the first joint of the two anterior 
ones not prolonged inferiorly into a hooked appendage. Labrum 
usually apparent. Maxillary teeth robust. 
In those species of the Melolonthide, Fab., which compose the sub- 
genus 
Me totontnua, Fab. 
Or Melolontha properly so called, the antennz consist of ten joints, 
of which in the males, the last six or seven, and in the females, the 
last six or four, form the club. The labrum is thick and strongly 
emarginated beneath. All the hooks of the tarsi are equal, terminate 
in an entire point, and are simply unidentate at base. The posterior 
extremity of the abdomen most commonly ends in a point or stylet, at 
least in the males. 
Of those species in which the antennal club is composed of seven 
leaflets in the males, and of six in the females, we will mention 
M. fullo; Scarabeus fullo, L.; Oliv., Col. I, 5, ii, 28. About 
an inch and a half long ; brown or blackish ; three lines on the 
thorax, two white ovoid spots on the scutellum, and several 
other irregular ones on the elytra. The antennal club of the 
male is very large. Found near the sea coast on the Downs. 
M. vulgaris; S. melolontha, L.; Oliv., Ib., I. 1, a—d*, 
Black; hairy; the antenne, anterior margin of the epistoma, 
elytra and greater part of the feet reddish-bay; thorax some- 
what dilated and marked with an impression near the middle of 
its lateral edges, sometimes black, and sometimes red ; four ele- 
vated lines on the elytra, whose outer margin is the colour of the 
ground ; triangular white spots on the sides of the abdomen ; 
the anal stylet tapering insensibly to a point. 
M. hippocastani, Fab.; Oliv., Ib.,.1, 3,a, b,c. This Insect, 
formerly confounded with the vulgaris, is rather smaller, shorter 
and more convex; the elytra are margined with black, and the 
anal stylet is proportionably shorter and contracted before the 
extremity which thus appears broad and obtuse. 
* While this work was in press, that of M. Straus on the anatomy of the M. 
vulgaris was presented to the Acad. Royale des Sciences, at whose expense it was 
published. We sincerely regret that we had not time to profit by this excellent 
work. . M. Leon Dufour had already made us acquainted with every thing relative 
to the system of digestion and the organs of generation, M. Chabrier has also de- 
scribed and figured with great exactness the muscles of the wings and the thorax, 
M. Straus has completely supplied all other deficiencies, 
