94 GEOPEPHAGA — CARABIPAE. 



impression, fourth stria Lent; under-side and legs bronze- 

 o-reen. L. 2H. Not uncommon. B. paludosum,V?a\z. 



Tachi/j)ns. 



A. Head, with the eyes, scarcely broader tlian thorax ; 

 first joint of antennae greenish. 



Coppery-bronze, with a greenish reflection ; basal half 

 of antennae (except first joint), palpi and legs yellow. 

 Punctuation fine. L. 2^ I. Not uncommon. 



2\ 2'>((lli]J<is, Duft. 



B, Head, with the eyes, wider tlian thorax ; first joint of 

 antennae yellow or reddish. 



Bronze, with greenish reflection ; basal half of an- 

 tennae, palpi and legs yellow, knees somewhat greenish. 

 Punctuation rather strong ; dorsal furrow on thorax deeper 

 at the ends, and an impression on disc on each side ; elytra 

 more bluntly rounded at apex than in T. _?ja/%cs. L. 2 1. 

 Common. T.flavifes, Lin. 



HYDRADEPHAGA. 



A, Antennae tln-eadlike. 



Sides of thorax forming a more or less continuous out- 

 line with those of the elytra; inner maxillary lolie with a 

 fixed hook ; mentum deeply emarginate ; front pairs of 

 legs rather short, posterior pair long and more or less 

 fringed with swimming hairs ; mesosternum very small ; 

 metasternum large; abdomen with six ventral segments 

 visible in both \sexes, the first three soldered together; 

 wings well developed. Dijtiscidae. 



B. Antennae very short and thick, the second joint large, 

 thii'd joint forming a large lateral appendage, following 

 joints much broader than long. 



Head sunk in thorax, eyes divided completely into two 

 by side margin of head, one pair looking upward, the other 

 downward. Body ovate, convex, outline continuous ; 

 mentum deeply emarginate ; maxillae curved, sicklelike, 

 of send-horny-consistencc, inner lobe sharply pointed, 



