420 INSECTA. 



tremity, and its margin ciliated. All the tarsial crotchets are en- 

 tire(l). 



There, an axillary piece — the same observed in that place in Ce- 

 tonia, or the epimera of M. Audouin — fills the space comprised 

 between the posterior angles of the thorax and the exterior angles 

 of the base of the elytra. 



Ometis, Lat.(2) 



The genus Melolontha of Fabricius will form our fourth and fifth 

 sections. 



The fourth, that of the Phyllophagi, is composed of Scarabseides 

 that closely approach those of the two las^t subgenera; but the man- 

 dibles are covered above by the epistoma, and concealed beneath by 

 the maxillaej their outer side is alone exposed, without however 

 overlapping; their outer side presents none of the sinuses or denta- 

 tions observed there in Rutelaand other analogous subgenera. The 

 anterior edge of the labrum is exposed; it is sometimes in the form 

 of a reversed and wide triangle, and most frequently transversely 

 •laminiform, and emarginated in the middle. The number of the 

 antennal joints is not constant and varies from eight to ten; the 

 same remark applies to those of the club, and in several, with res- 

 pect to this, the two sexes differ greatly. The ligula is entirely 

 covered by the mentum, or incorporated with its anterior face, and 

 the elytra are completely joined along the whole of the suture, cha- 

 racters which distinguish tiiese Insects from those of the fifth sec- 

 tion. 



The family of the Anoplognathides of M. Mac Leay, and some 

 other subgenera closely allied to some of those in the preceding sec- 

 tion, will compose our first division. The epistoma is thickened 

 anteriorly, and either alone or with the labrum forms a vertical facet 

 in the figure of a reversed triangle, the point of which rests on the 

 mentum. The latter is sometimes almost ovoid, densely pilose, with 

 the extremity either rounded or truncated and unemarginate; some- 

 times it forms a transverse square, with the middle of the^superior 

 margin prolonged into a tooth, simple or emarginate. The maxillae 

 of some are terminated by a coriaceous or membranous lobe that is 

 densely pilose, edentate, or with but very small teeth, situated near 

 the middle of the inner side; those of others are entirely corneous, 



(1) See Rutela, Encyc. Method., and Hor. Entom. 



(2) Rutela cetonioides, Enc)'c. Method.; — Rutela cerata. Germ.; — AnisopUa his- 

 trioP Dej., but with antennse of nine joints. 



This subgenus seems to connect these and the preceding Insects with the Ce- 

 tonix. 



