48 ORDER COLEOPTERA. 



Chixenius KEMORALis. ( Plate XX, fig. 5.) 



Head and thorax metallic green ; elytra blue-black, rather brilliant ; legs, palpi and an- 

 teiuue brown. Length half an inch. 

 This species is rather broader than the foregoing. 



Chuenius sEKicEos. ( Plate XX, fig. 7.) 



Head, thorax and elytra brilliant green above, glossy black below, punctate ; legs, palpi 

 and antennae brown. Length from six- to seven-tenths of an inch. 



Ghuenius TOMENTosus. ( Plate XX, fig. 2.) 



Head black, dark bronze, punctate ; elytra dark, bronzed and faint greenish hue, tomen- 

 tose. 



Chlcenius lithophilcs. (Plate XX, fig. 8.) 



Head, thorax and elytra green, brilliant black beneath ; legs, palpi and antennce brown. 

 Length four-tenths of an inch. 



Gents TRECHUS (Clairv.). 

 Mentum transverse, tridentate anteriorly ; central tooth shortest ; head ovate ; thorax 

 oordate truncate ; angles mostly rounded. 



Teechus ciNCTUs. ( Plate xix, fig. 8.) 



Small, shining brown ; head darker ; elytra rather lighter on the outer than the inner 

 margin. Length two-tenths of an inch. 



Trechus conjunctus. (Plate xix, fig. 7.) 



Small, shining brown ; head black or dark brown. Length rather more than two-tenths 

 of an inch. 



Gencs CALATHUS (Bon). Cahabcs (Lin.). 

 Tarsal claws toothed ; palpi simple and rather long ; labial nearly filiform, the terminal 

 joint truncate ; labrum transverse, a little emarginate ; mandibles dentii*y]ated at the 

 base ; mentum Avith a bifid tooth in the centre of the notch ; elytra elliptic ; thorax 

 subquadrate or trapeziform ; head angular. 



Calathus gregarius. (Plate xviii, fig. 16.) 



Form ovate ; antennse long filiform : head, thorax and elytra of a glossy brown color ; 

 margin lighter ; legs brown. Length about four-tenths of an inch. 



