24 COLEOPTERA OF NORTH AMERICA. 



Bomius. Trecliicus was formerly placed by me in Harpalini, but 

 the paraglossas are connate with the ligula, and the anterior tibiae 

 are not at all thickened or spinous; it differs from all the other 

 genera of this tribe known to me by the second joint of the an- 

 tenna? being equal to the third, which is pubescent, and the eighth 

 stria of the elytra anteriorly confluent with the ninth, as in certain 

 Bembidia. The elytra are broadly rounded at the tip, and scarcely 

 striate. 



Sub-Group 3. — C tmindes. 



The mentum tooth is large and distinct, not obscured by a basal 

 membrane; the head is not constricted behind; the labial palpi 

 are more or less dilated and truncate, and the maxillary cylindrical, 

 truncate; the fourth joint of the tarsi is triangular or bilobed. 



These species are of larger size, and found under stones and 

 bark; some species of Callida are also found on flowers. 



Ungues serrate ; 



Thorax lobed at the base, labial palpi thick. Apenes. 



Thorax undulated at the base, labial palpi thick.* Glycia. 



Thorax truncate at base, labial palpi moderate ; 

 Tarsi with the fourth joint emarginate ; 



Labial palpi with the last joint dilated, body hairy. Cymindis. 

 Labial palpi with the last joint elongate, body glabrous. 



PlNACODEEA. 



Tarsi with fourth joint bilobed, body glabrous. Callida. 



Ungues simple, thorax truncate at base. Philotechnus. 



The last genus is confined to the Pacific coast; Glycia to the 

 central district; Cymindis is widely distributed ; the other genera 

 are represented only in the Atlantic district. Pinacodera is estab- 

 lished by Schaum upon Cymindis limbata Dej. and its allies, and 

 differs from Cymindis by the male having four joints of the ante- 

 rior tarsi dilated, while in genuine Cymindis there are but three. 

 Apenes is remarkable for the depth of the clypeal suture. 



This sub-group osculates very closely with the Platynus group 

 of the Pterostichini. 



* Motschulsky (Bull. Mosc, 1859, ii. 143) has proposed a genus Philo- 

 phuga for Cymindis viridis Dej. and another Californian species. It is 

 said to differ from Glycia by the bilobed fourth tarsal joint, and from Cal- 

 lida by the larger lobes of the mentum. I have not had an opportunity of 

 seeing either of the species referred to by the author. 



