256 INSECTS. COLEOPTERA. 



C. striatus, Clairv. Fore part of the head, lateral borders of the 

 thorax, and a part of its anterior extremity brown ; elytra green- 

 ish black, with two rows of small hollow points and yellow trans- 

 verse striae; feet brown black. Inhabits Europe Oliv. Coleon iii 

 pi. 2, fig. 20. 



C. bipustulatus, Clairv. Black ; feet, fore part of the head, and tho- 

 rax light brown ; elytra with a transverse band at the base, and 

 the exterior margin yellow. Inhabits Europe. Lat. Gen. i. 231 . 



Gen. NOTERUS, Clairv. Dytiscus, Fab. 

 Labial palpi forked ; antennae dilated, broader in their middle ; 

 palpi filiform. 



N. crassicornis, Clairv. Brown, with the head and thorax ferrugi- 

 nous ; elytra with scattered impressed points. Inhabits France 

 and Germany. Lat. Gen. i. 232. 



Gen. HYGROBIA, Lat. Hydrachna, Fab. 

 Body gibbous ; exterior palpi thickest at their extremity ; an- 

 terior tarsi folding under the leg. 



H. Hermanm, Lat. Antennae and head ferruginous, with a black 

 spot around the eyes ; thorax black, with a transverse ferrugi- 

 nous band ; elytra black, the base ferruginous ; under parts black. 

 6 lines long. Inhabits Europe. Lat. Gen. i. pi. 6, fig. 5. 



Gen. HYPHYDRUS, 11%. Dytiscus, Fab. 

 Antennae filiform, with the second joint largest ; four anterior 

 tarsi with four distinct joints, the fourth concealed in the pre- 

 ceding, similar in both sexes, the third deeply bilobed. 



H. inequalis, Lat. Ferruginous below, black above, with the cen- 

 tre of the thorax, sides and base of the elytra, and sometimes lines 

 on their disc, ferruginous ; elytra dotted. Inhabits Europe 

 Nouv. Diet. xv. 532. 



H. sexpustulatus, Lat. Body oblong, black, with the base of the 

 antennae, head, feet, and lateral borders of the thorax yellowish 

 brown ; elytra black, with the base, and a streak near the exte- 

 rior border, pale yellow. 1^ line long. Inhabits Europe. Nouv. 

 Diet. xv. 533. 

 The genus Hydroporus of Clairville is included by Latreille in the present. 



Gen. HALIPLUS, Lat. Hoplitus, Clairv. Dytiscus, Fab. 

 Antennae of ten joints, inserted between the eyes and distant 

 from the labrum ; exterior palpi subulate ; a plate in the 

 form of a shield at the origin of the posterior feet ; tarsi 

 with five joints. 



The insects of this genus have nearly the same habits as the Dytisci, and are found 

 in stagnant waters or pools, or on aquatic plants. 



H. impressis, Lat. Head clear brown ; thorax ferruginous ; ely- 

 tra grayish, with many longitudinal rows of impressed black 



