COLEOPTERA CARABIDH— DYTICIDZ. 7 
PERYPHUS Meg. Etarurus p. Dufts. 21 sp. Car. littoralis Oliy. Pz. 35. 6. 
Thorax truncate, cordate ; hinder angles very acute; fifth antennal joint shorter 
than the third and fourth. 
NOTAPHUS Megerle. Bremuinium p. Stm. 9sp. Car. ustulatus Linn. Pz, 40. 7. 
Thorax truncate, cordate; hinder angles acute; third and fourth antennal joints 
shorter than the fifth. 
LOPHA Meg. Cictnpera p. Linn. 14 sp. Cic. 4-maculata L. Pz. 38. f. 8. 
Thorax truncate, cordate, gibbose ; hinder angles deflexed ; eyes moderate. 
TACHYPUS Meg. Leta p. Dej. 9 sp. Car. Andree Fabr. Steph. Ill. pl. 10. f. 6. 
Thorax truncate, cordate, depressed, sessile; hinder angles deflexed ; eyes moderate. 
BEMBIDIUM Illig. Crictnpveta p. Linn. 4 sp. Cic. flavipes Linn. Pz. 20. f. 2. 
Thorax truncate, cordate; eyes extremely prominent; elytra tubercled. 
Stirps 2. Hydradephaga MacL. (Hydrocanthari Latr. ) 
Family 1. DYTICIDZ Leach. (Dytiscus Linn. Dyticus Geoff: ) 
Subfamily 1. Haliplides Westw. 
Antenne 10-jointed ; posterior coxe dilated into a large shield covering the base 
of the legs. 
HALIPLUS Clairv. Cwyemivorus Jil. 11 sp. Dyt. elevatus Fabr. 
Max. palpi with the last joint very minute and subulate. Pz. F. I. G. 14. f. 9. 
CNEMIDOTUS Erichson. Hatirtus p. Steph. 1 sp. Dyt. cesus * Duftsch. 
Maxillary palpi with the last joint larger than the preceding, conical. 
Subfamily 2. Dyfticides. 
Antenne 11-jointed; palpi filiform, or but slightly thickened; base of pos- 
terior legs not covered by the coxa. 
NOTERUS Clairv. Hatirtus p. Sch. 2 sp. Dyt. crassicornis Fabr. Curt. 236. 
Antenne fusiform ; scutellum inconspicuous ; posterior tarsal claws equal. 
LACCOPHILUS Leach. Dyriscus p. Linn. 2 sp. Dyt. minutus Linn. 
Antenne setaceous; scutellum inconspicuous; posterior tarsal claws unequal. 
1m 1s he (Ce Bie Gh 
HYDROPORUS Clairv. Hyruivrus p. Illig. 50 sp. Dyt. 12-pustulatus Fab. 
Body depressed; anterior tarsi 4-jointed; posterior tarsi slender with equal 
moveable claws. Curt. 343. 
HYGROTUS Steph. Hyprornorus p. Clairv. 11 sp. Hyp. decoratus Gyll. 
Body subglobose ; anterior tarsi 4-jointed ; posterior tarsi didactyle. Curt. 531. 
HYPHIDRUS Ullig. Hypracuna p. Fabr. 2 sp. Dyt. ovatus Linn. 
Body globose; anterior tarsi 4-jointed; posterior tarsi compressed, with one 
moyeable claw. Donov. 2. pl. 68. 
PA LOBIUS Schonh. Hycrosta Clairv. 1 sp. Dyt. Hermanni Fabr. 
Body subglobose; scutellum distinct; legs gressorial; claws didactyle. Donoy. 
14, 501. : 
COLYMBETES+ Clairv. Dyticus p. Linn. &c. 40 sp. Dyt. fuscus Linn. 
Seutellum distinct ; legs natatorial; labial palpi with the second joint longer 
than the third ; anterior male tarsi slightly dilated; claws of tarsi unequal. 
Curt. 207. . 

* Stephens gives this as synonymous with the impressus Fabr., but the two are 
considered by Erichson as belonging to different genera. 
+ This genus has been subdivided into numerous subgenerie groups by Eschscholtz 
B4 
