COLEOPTERA. 449 



antennae is not apparent; they are terminated by the tenth, which is 

 somewhat larger than the preceding ones, turbiniform, and obliquely 

 truncated at the end. In the form of the head, its anterior emargi- 

 nation, and frequently also in the figure of the thorax, these Insects 

 closely resemble the true Akis. In 



EuRYCHORA, Thunb. 



The body is oval with acute and ciliated edges; the thorax semi- 

 circular, and receives the head into an anterior emargination, the 

 abdomen almost cordiform. The antennae are composed of linear 

 joints, compressed or angular, the third of which is longer than the 

 preceding and following ones(l). 



Adelostoma, Dup. 



These Insects have a narrow and elongated body, with an almost 

 square thorax, slightly narrowed posteriorly; the antennae tolerably 

 stout, almost perfoliated, and all the joints, the last excepted, nearly 

 lenticular and equal. Their labrum, mandibles and palpi are con- 

 cealed(2). 



We will terminate the Pimeliariae with those in which the supe- 

 rior edge of the square mentum is neither emarginated nor widened. 

 Their body is always oblong, and the thorax sometimes almost 

 square, rounded or dilated, and at others narrow, elongated, almost 

 cylindrical, and the abdomen ovoid or oval. The antennae always 

 consist of eleven distinct joints.. The anterior thighs are inflated, 

 and even sometimes dentated in several or at least in one of the 

 sexes. These Insects evidently form the passage from this tribe to 

 the following one. 



Sometimes the antennae are entirely or almost entirely granoseor 

 composed of short joints, either ovoid or globular, turbiniform, 

 or almost hemispherical. 



Of these, some resemble the Pimeliariae of the last subgenera in 

 the dilatation and prolongation of the lateral margin of the head. 

 Their labrum is very short or projects but little. The lateral bor- 

 ders of the thorax are straight or simply arcuated and rounded, and 

 without any angular or dentiform dilatation. The eyes are but 

 slightly protuberant. 



(1) Lat., Gener. Crust, et Insect., II, p. 150; Schosnh., Synon. Insect., I, ii, 5; — 

 Schoenh., Synon. Insect. I, i, tab. 2, 5. 



{2) Adelostoma sulcatum^ Duponchel, Mem. de la Soc. Lin. de Paris, 1827, XII, 

 A, B, C; an Insect found in the environs of Cadiz by the son of that savant, at 

 Tangier by M. Goudot, Jan., but brought from Syria a long time ago by M. La- 

 billardiere. 



Vol. III.— 3 G 



