of a Sub- Genus of Coleopterous Insects. 209 



are of sufficient importance to constitute genera, I can but regard 

 them as ofF-sets as it were of the great genus Cnrabus* 



Aplothorax Burchellu. (Plate XII. fig. 1.) 



Aploth. n'lger ; thorace cord'tformi, antice et postice truncato, an- 

 guUsque anticis et posticis rottindatis, supra Icevi et convexo; elytris 

 punctato-striatis, str'iis punct'isque crebris at non profund'is; inter 

 strias tert'iam quartamque , el 7-mam et 8-vam, jmnctls grandioribus 

 cum illis striarum conjluent'ibus. 

 Mus. Dom. Hope. Habitat apud St. Helenam. 



The total length of this insect is 1 3| 



Width of the elytra .5| 



Length of head 3| 



Width of head 3 



Length of thorax 3| 



Width of thorax Sh 



Plate XII. fig. 1. Aplothorax Burchellii of the natural size. 



1 a, labi'um ; 2 b, mandible ; 1 c, and 1 d, upper and under side 

 of the maxillae ; t 1 e, mentum, labium, and labial palpus ; 

 If, antenna ; 1 g, fore foot. 



* The relative number of species, together with their geographical distribution, 

 furnish physiological characters which will hereafter in all probability be taken 

 into consideration, when the value of groups is to be determined. 



t [This is the only instance hitherto observed in which such a structure of the 

 apical portion of the maxilla as is exhibited by this insect exists. I was particular 

 in noticing that both maxillae agreed in this formation, — J. 0. IF.] 



