FAMILY CARABIDiE. 51 



Genus CARABUS. 



Labriuu bilobate ; mandibles famished with a tooth iu the middle ; mentum-tooth entire ; 

 thorax subcordate, emarginate behind ; palpi with the last joint securiform ; antennae 

 linear, second joint shortest, third cylindric ; wings rudimentary or none. Anterior 

 tarsi of males dilated. 



Carabi-s vinctus (Weber); C. interruptus (Say). (Plate xxi, fig. 11.) 



Head and thorax smooth, blue-black. Elytra black, faintly bronzed, and marked with 

 punctured lines : tbe three interrupted lines are sharply elevated, and the metallic- 

 points are reflected from these interruptions. Length eight- to nine-tenths of an inch. 



Carabus serratus (Say). (Plate xxi, fig. 12.) 



Color black, with blue and purplish hues which are reflected from the margins of the 

 elytra and thorax : head and thorax plain and glossy black ; margins of the thorax 

 elevated and punctured. Elytra thickly punctured in about twelve rows : if taken in 

 threes, there are three rows of ovoidal parallel impressions without punctures. Length 

 seven- to eight-tenths of an inch. 



Cakabus limbatus (Say). (Plate xxi, fig. 16.) 



Color black : head and thorax smooth and glossy black. Elytra purplish black, bordered 



with blue and purplish hues, and marked by seventeen or eighteen punctured lines : 



three of these lines are broken by stellate or cruciform markings. Length nine-tenths 



of an inch. 



Gents CALOSOMA (Web.). Carabus (Lin.). 

 Labrum bilobed ; thorax transverse, shorter than wide ; abdomen subcpiadrate, wider 

 behind than before ; wings large ; palpi with the last joint ovate, truncate ; labium 

 short broad, the upper margin setose acuminated ; mentum sublinear, rounded late- 

 rally, unidentate in the middle. Antennse, second joint shortest ; third longest, com- 

 pressed. 



Calosoma scrutator. ( Plate x, fig- 8.) 



Head blue-black : thorax blue-black, surrounded with golden green. Elytra green with 

 purplish reflexion and bordered with cupreous, marked with punctured lines : the 

 ridges between are transversely marked with numerous lines ; each elytrurn is also 

 ornamented with three rows of distant green dots, which are not very conspicuous. 

 The whole body beneath is green, with steel-blue reflections : legs steel-blue, and the 

 thighs are punctured with four or five rows of dots ; tarsi and tibia? dusky. Length 

 exceeds an inch : about \\ inches. 



