INSECTA. 467 



genera belong to the Pentamera. The Heteromera are such as have 

 an unequal number of joints of the tarsus in different feet, namely, 

 five in the first four feet, four in the last two. The remaining 

 divisions, which have been formed, are Tetramera, Trimera, Dimera 

 and Monomer a; the last two, however, in consequence of later 

 observations, are obsolete 1 , and there remain only the Trimera and 

 Tetramera; on which we may remark, that, according to more 

 accurate investigation, in the Trimera and in many Tetramera a 

 small joint has been found situated at the base of the last joint, and 

 which, when this joint is in its ordinary position, is almost con- 

 cealed and invisible 2 . The Trimera are thus in reality Tetramera; 

 they are named by WESTWOOD, Pseudotrimera (Cryptotetramera 

 BUEM.). The Tetramera of LATREILLE are now named by BUE- 

 MEISTEE Cryptopentamera, by WESTWOOD Pseudotetramera. The 

 first three or four joints of the tarsus are commonly broad and 

 below flat, furnished with small inequalities and beset with little 

 hairs at the margin. The last joint (the last two joints taken 

 together in the Pseudotrimera and Pseudotetramera) is small, 

 inversely conical, elongate, horny and smooth, and terminates with 

 curved nails or hooklets. 



A. Pseudotrimera. 



Family XLIV. Coccinellidce (Aphidiphagi LATE.) Body 

 tearly semi-globose, above gibbous, below plane. Thorax short, 

 , lunate. Antennse inserted before the eyes, capable of con- 

 |ealment under the head, shorter than thorax, terminated by a 

 ipitulum ob-triangular, compressed. Maxillary palps securiform 

 ith last joint large, depressed, triangular) ; labial palps filiform, 

 t short ; second joint of tarsus bilobed, broad. 



Coccinella L. 



Sub-genera: Coccidula MEGEELE (Cacicula STEPH.), Scymnus 



KUGELANN, &C. 



1 Thus the Pselaphii (supposed previously to be dimera) have, according to LEACH, 

 ) joints, and Clambus, the only genus of the so-named monomera, has four joints, 



ling to WESTWOOD, Introd. to mod. Class, i. p. 37. 



2 PH. W. J. MULLER observed this in Coccinella, ILLIGEB'S Mag. s. 218. In 



there are in this way five joints. Comp. also KIRBY and SPENCE, Introd. to 

 I. in. pp. 683, 684, and especially W. S. MAC LEAY, On the Structure of the 

 in the tetramerous and trimerous Coleoptera of the French Entomologists, Transact, 

 'the Linn. Soc. Vol. xv. 1827, pp. 63 74. 



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