CANCROIDEA. 



147 



seven, the full Cancroid number, and other characters are as in the 

 Chlorodinae. 



The conflict between the genera of Edwards and De Haan has been 

 alluded to, and the difficulty of adopting all those of the latter without 

 also using his system. The case of Eudvra and Ruppellia has been 

 mentioned. In this and other similar instances, we are forced to 

 retain Edwards's generic name, if we retain his genus as to limits. 

 Moreover, we see no reason for substituting De Haan's JEgle in place 

 of Zozymus of Leach, any more than his Chlorodius for Atelecyclus 

 of Leach, or Anisopus for Platyonychus of Latreille. 



I. CAtfCRINEA, or CANCROIDEA TYPICA. 



Family I. CANCRID^E. 



Pedes postici gressorii. Palatum colliculo ad marginem anticum product® 

 non bene divisum. 



Posterior feet gressorial. Palate not divided either side of middle 

 by a longitudinal ridge reaching to its anterior margin. 



The genera of Cancridae are naturally arranged into a series of 

 groups or subfamilies, based partly upon the inner antennae, — the 

 relation of the base of the outer antennae to the orbits, — the character 

 of the fingers, whether pointed, or excavated spoon-like. The follow- 

 ing synopsis includes these subfamilies, and the known genera per- 

 taining to them, with their characteristics. It is a general fact with 

 regard to the species, that the antero-lateral margin is longer than the 

 postero-lateral, which is not true of the Eriphidae. There are some 

 few exceptions, however, as in the genera Liagora, Menippe, and 

 Panopaeus. 



1. CANCRINiE. — Antennae internae plus minusve longitudinales. 

 Frons interorbitalis perangustus. Digiti acuminati. 



