COLEOPTERA. 427 



Macrodactylus, Lat. 



Similar to Diphucephala in the hooks of the tarsi and the elonga- 

 tion of the body; but here the thorax is longer, almost hexagonal, and 

 all the joints of the tarsi are alike in both sexes, elongated and sim- 

 ply pilose. 



They are peculiar to the western continent(l). 



There, the hooks of the intermediate tarsi are alone unequal. 



Plectris, Lepel. and Serv. 



The largest of these hooks and the two of the other tarsi bifid; 

 first joint of the posterior tarsi very long(2). 



In the others, all the hooks of the tarsi are unequal; those of the 

 two posterior ones, at least, are always entire; one at least of the 

 two or four anterior tarsi of the males, and sometimes of the fe- 

 males, is bifid. 



Popilia, Leach. 



The sternum advancing between the legs in a compressed and 

 truncated, or very obtuse lamina(3). 



Euchlora, Mac L. Jlnomala, Meg. Dej. 



No sternal projection; one of the hooks of the four anterior tarsi 

 bifid in the males; body arched; epistoma short and transversal(4). 



Anisoplia, Meg. Dej. 



No sternal elongation; but one of the hooks of the four anterior 

 tarsi is bifid in the two sexes; the back is depressed, and the episto- 

 ma usually narrowed anteriorly, and raised at its extremity(5). 



Lepisia, Lepel. and Serv. 



No sternal spine, but distinguished from the preceding by the four 

 anterior tarsi, the hooks of which are bifid(6). 



The Hoplidse or the Phyllophagi, of our third and last division, 



(1) M. subspinosa, Fab., and several undescribed species. 



(2) Encyc. Method., article ScarabeYdes. 



(3) Trichius 2-punctatus, Fab. 



(4) The M. viridis, bicolor, errans, marginata, cyanocephala, vitis, Julii, Frischii, 

 kolosericea, aurata, &c, of Fabricius. See Hor. Entom., I, p. 14,7- The genus 

 Mimela, Kirby, appears to me to approximate closely to Euchlora; not having 

 seen a specimen of the former, I can say no more- 



(5) The M. hordeola, Jloricola, auricola, fruticola, agricola, lineata, &c, Fab. 



(6) Encyc. Method., article ScarabeYdes. 



