ORDER COLEOPTERA. 479 



three teeth or angular projections ; all the tarsi terminate in 

 two hooks ; the first articulation of the two anterior tarsi 

 not elongated into a bent appendage ; the labrum is commonly 

 apparent, and the maxillary teeth are robust. 



The species of Melolontha of Fab., which will form the 

 subgenus 



Melolontha, Fab., properly so called. 



Have ten articulations in the antennae, the last five or seven 

 of which in the males, and the last five or six in the females 

 constitute the knob. The labrum is thick and strongly emar- 

 ginated underneath; all the hooks of the tarsi are equal, 

 terminated in an entire point, and simply unindentated at the 

 base. The posterior extremity of the abdomen finishes in 

 general in a point or stylet, at least in the males. 



Among the species whose knobs of the antennas have seven 

 leaves in the males, and six in the females, we will cite 



ScarabcBiis fullo, Lin. Oliv. Col. 1, 5, III. 28, about an 

 inch and a half long, brown or blackish, with three lines on 

 the corslet, two ovoid spots on the shield, and many other 

 irregular on the elytra white. The knob of the antennae of 

 the males is very large. It is found on the maritime coasts 

 on the Downs. 



S. melolontha, Lin. Oliv. ibid, I. 1, a. d.* black, downy, 

 with the antennae, the upper edge of the hood, the elytra, 

 and the greatest part of the legs of a reddish bay. The 



* At the very moment of sending this sheet to the press, M. Straus's 

 work on the anatomy of this insect, was presented to the Royal Academy 

 of Sciences, which work he has published at his own expense. We regret 

 exceedingly not having had the opportunity of using this excellent work. 

 M. Leon Dufour had already made known all that relates to the digestive 

 system, and to the oi'gans of generation. M. Chabrier had also written 

 and figured with great exactness the muscles of the wings and thorax. 

 M. Straus has supplied perfectly the other deficiencies. 



