324 



MODERN CLASSIFICATION OP INSECTS. 



coating of a whitish colour upon their bodies when dried. This is 

 especially the case with the Eurychoroe, as we learn from M. Wes- 

 termann's letter to Wiedemann, published in Silbermann's Revue 

 Entomol. The Pimelia bipunctata observed by Latreille, inhabits the 

 sandy shores of the Mediterranean, concealing itself in holes which 

 it excavates with its legs. The chief (exotic) genera belonging to 

 this family, are Erodius, Tentyria, Pimelia, Nyctelia, Asida, Akis, and 

 Eurychora, the last having the body flattened, with the margins thin, 

 and turned slightly upwards. Some fev/ of the genera have only ten 

 distinct joints in the antennae as in Stcira W. {Jig. 39. 12.). 



Sect. iii. PSEUDOTETRAMERA. 



The third general section of the Coleoptera comprises those 

 beetles which have the tarsi apparently 4-jointed {Jig. 40. 6. 16.) 



Fig. 40. 



although in reality consisting of five joints*, the fourth joint being so 

 minute {Jig. 41. 16.) as to have escaped the notice of the tarsal 

 systematists, who, consequently, gave to these insects the sectional 

 name of Tetramera, which, as previously observed (p. 44.), may be 

 advantageously altered to Pseudotetramera. 



The minute joint above mentioned, as v/ell as the basal portion of the 

 terminal joint, are received between the lobes of the third joint, which 



* In some spociesj however, the fourth joint appears quite obsolete. I can, e. g., 

 find no trace of it in Brachycerus {fig. 41. 6.), in which the third joint is not 

 bilobed ; but in the analogous unlol)ed and uncushioned tarsi of some of the Longi- 

 cornes (Prionus Cumingii Jlope, Zool Trans, pi. 14. fig. 7.), the fourth joint is 

 quite distinct. 



