52G INSECTA. 



Pachypus, Dej. (the males of which have only 8 joints in the antenna?, the club being' 5-jointed, P. excavalm) 

 [South of Europe], and 



Amblyterus, Mac Leay (having' the antennae 10-jointed, the club being 3-jointed), have the mentutn nearly ovoid 

 and very hairy, and the maxilla; terminated by a triangular hairy lobe, without teeth, or with very small ones. 



Anoplognathxs, Mac Leay, (and Repsimus, Leach), have a sternal point, the claws of the tarsi entire and unequal 

 in size, the antennas 10-jointed. [These are splendid Australian insects, with bronzed bodies, apparently of very 

 common occurrence, from the numbers brought to England.] 



Leucothyreus, Mac Leay, has the antennae 10-jointed, one of the tarsal claws entire and the other bifid ; the 

 anterior tarsi are dilated, and spongy beneath in the males. [Brazilian insects.] 



Apogonia, Kirby, differs in having all the tarsal claws bifid. [Exotic species of small size.] 



Geniatet, Kirby, has the antennae 9-jointed, and the extremity of the maxillae with three teeth, the mentum of 

 the males with a beard, the claws as in Leucothyreus. G. bnrbatus, Kirby, (Brazil). Melolontha obscura, and others, 

 appear to form a different subgenus, the tarsi not being dilated. 



A second division of the Phyllophagi [called by mistake Xylophiles in the text], and which comprises 

 the Melolonthidce of Mac Leay, has the lahrum transverse, with a notch in the middle; the mentum is 

 as long as, or longer than broad, either nearly square or heart-shaped. The maxillae are scaly, and 

 mostly armed with five or six teeth. This division comprises two subdivisions, Melolonthides and Hoplides. 



The Melolonthides have more than three plates in the club of the antennae : the body is generally 

 thick, mandibles robust, entirely, or for the greatest part, horny, the upper extremity strongly truncate, 

 with two or three teeth, the labrum generally visible, the maxillary teeth robust, and all the tarsi have 

 two claws. 



Melolontha proper, has 10-jointed antennae, the last five or seven in the males, and four or six in the females, 

 form the club ; the labrum is thick and deeply notched in the middle ; the tarsal claws are equal ; the abdomen 

 is generally pointed at the end, at least in the males. 



Melolontha vulgaris (Scarabicus melolontha, Linn.), [the common Cockchaffer,] is too well known to require 

 description, and has formed the subject of elaborate anatomical works by Strauss Durckheim, Leon Dufour, and 

 Chabrier. This insect (as well as another closely-allied species, M. hippocastani) [which last, however, is of very 

 rare occurrence in this country] appear in certain seasons in so great abundance that they defoliate in a very 

 short time large spaces of our forests and woods, devouring the leaves. The larva is also equally destructive to 

 the roots of grass, &c, in our pastures and gardens, being a white grub [with a scaly head, six legs, and the body 

 thick, fleshy, white, and curved, so that the creature ordinarily lies upon its side]. 



Rhisotrogus, Latr., differs only from Melolontha ill having the antennae 9 or 10-jointed, with the club 3-jointed. 

 As it is not always possible to distinguish the number of joints immediately preceding the club of the antennae, 

 1 reunite the genus Amphimallon, which I had first formed, and in which there are only nine joints in those 

 organs. M. solstitialis, [the July Chaffer, a very common British species,] and others. 



Ceraspis, Lep., Serv., has the hind margin of the thorax with two notches, the intermediate space forming a 

 point ; antennae 10-jointed ; tarsal claws, except the anterior, unequal ; body clothed with small scales ; consisting 

 of a few Brazilian species, C. pruinosa, &c. 



At coda, Leach, has 10-jointed antennae ; the sternum pointed ; all the tarsal claws equal in the supposed females, 

 and unequal in the males. These are of brilliant colours. [A. lanigera, a handsome but common North Ameri- 

 can insect.] In all the following Melolonthides the antennae have only nine joints. The four following have all the 

 tarsal claws equal. 



Dasyus, Lepel. and Serv., has the ungues of the two fore-feet, at least in the males, bifid, the others entire. 



Serica, Macl. (Omaloplia, Dej.), has all the ungues bifid ; the body ovoid, swollen, silky, with the thorax much 

 broader than long. S. brunnea [a common British species of small size, mostly found in Spiders' webs]. 



Diphucephala, Dej. , has all the tarsal claws bifid ; fore-tarsi more or less dilated in the males ; body narrow, 

 and the front of the head deeply notched. [Small species of a shining green colour, proper to Australia ; mono- 

 graphed by Waterhouse in Trans. Ent. Soc. vol. i.] 



Macrodactylus, Latr., resembles the last in the length of the body, but the thorax is nearly hexagonal, and the 

 tarsi alike in both sexes. Small insects, peculiar to the New World. 



The remainder have the ungues of the middle tarsi alone unequal. 



Plectris, Lep., Serv., has the largest of the middle ungues, and both in the other tarsi bifid. 



Popilia, Leach, has the sternum advanced. [See Newman's Monograph of this genus, an abstract of which has 

 appeared in the Mag. of Nat. Hist.'] 



Euchlora, Mac Leay (Anomala, Meg.), has no sternal point; one of the ungues of the four anterior tarsi is bifid 

 in the males ; body convex ; clypeus short and transverse. [Latreille cites a species, M. viridis (which is the true 

 type of Euchlora, of which group, confined to the Asiatic species, Mr. Hope has given a monograph in the Pro- 

 ceedings of the Zoological Society,) and also M. Vitis, Julii, Frischii, &c, which are retained as species of Anomala 

 by English writers. The allied genus, Mimela, K.) has also been monographed by Mr.Hope in Trans. Ent. Soc. vol.i.] 



Anisoplia, Meg., has also no sternal point, but the clypeus is narrow in front, with the extremity elevated. 

 M. horticola, agricola, [British species], 



Lepisia, Lepel. and Serv., have no sternal point, but the four anterior tarsi have both ungues bifid. 



