ORDER COLEOPTERA. 249 



Hydroporus, Clairv. Hyphydrus, Lat. Schoenh., 



In which the four anterior tarsi almost similar, and spungy 

 underneath, in both sexes, have but four distinct articulations, 

 the fourth being nullified, or very small and concealed, as 

 well as a part of the last in a deep fissure of the third. 



They have no apparent scutellum, but the preceding, with 

 the exception of some small species, have a very sensible 

 one. 



"We might detach from them some species (The Hy- 

 drachnas, gibhuy ovalis, and scripta of Fabricus; Hyphydrus 

 Lyratiis, Schoenh. Synon. Insect. II. iv. i.), whose body is 

 very gibbous, or almost globular, and of which the least 

 articulation of the four anterior tarsi is very small, and pro- 

 jects but little beyond the preceding. {Hyphydrus, Lat.) 

 The others have the body oval and less thick.* 



Sometimes the antennae are a little dilated, and wider to- 

 wards the middle of their length ; the last articulation of 

 the labial palpi has an emargination, and appears forked. 



NoTERUs, Clairv. 



The scutellum is wanting; the tarsi have five distinct arti- 

 culations, the first two of the four anterior ones are dilated in 

 the males, and form an elongated palette. The first articu- 



The Hygroblae have the external palpi a little swelled at their extre- 

 mity, two strong spurs, and approximating to each other, at the end of 

 the legs; and their anterior tarsi capable of being folded under the legs, 

 on which they depend 



* The Dytiscus : incequalis, reticidatus, conjluens, pidpes, pictus, gemi- 

 71US, lineatiis, haleiisis, duodecim — pustulatiis, dorsa/is, sex — piistulatiis, palus- 

 tris, depressus, Uturatus, planus, erythrocephaliis, nigriia, granulans, of Fabri- 

 cius. See Schcenherr. Synon. Insect, torn. II. genus Hyphydrus ; Panzer, 

 Index Entom. genus Hydroporus, and Clairv. Entora. Helv., torn. II. 

 same genus. 



