PLATE V, 



All the drawings are by J. Henry Blake. The specimens drawn all come from Florissant, 



Page. 



. Tropisternus vanus 39 



. Tropisternus limitatus 40 



. Hydrobius maceratus. 43, 



. Hydrocharis extrieatus 41 



. Silpha colorata J 44 



. Agyrtes primoticus 45 



. Acylophorus immotus 47 



. Heterotliops conticens 48 



. Heterothops conticens; head and thorax 48 



. Quedius chamberlini 49 



. Quedius chamberlini 49 



