10 GENERIC SYNOPSIS. 
BEROSUS Leach. WHyproruitus Fab. 4 sp. Dyt. luridus Linn. Curt. 240. 
Sternum simple; labrum entire ; antennz 8-jointed; the club 3-jointed, obtuse ; 
eyes rather prominent; elytra very gibbous, much broader than the thorax. 
HYDROBIUS Leach. Hyproruitus Fab. 4sp. Dyt. fuscipes Linn. 
Sternum simple ; labrum slightly emarginate ; antennz 9-jointed ; body more or 
less elongate; elytra striated. Curt. 243. 
PHILYDRUS Solier. UHyprozius A. b. Steph. 7 sp. Hydr. melanocephalus F. 
Maxillary palpi much longer than the antenne, with the last joint evidently 
shorter than the preceding; body oblong; elytra not striated. Herbst. 7. 
pl. 114. 4 D. 
LACCOBIUS Erichson. Limyesius Brullé. 10sp. Hydr. bipunctatus Fab. 
Antenne 8-jointed ; terminal joints of max. palpi but slightly elongate, subequal ; 
body subglobose ; elytra punctate ; posterior tibia not ciliated; tarsi slender, 
ciliated. Pz. 67. 14. 
CHATARTHRIA Waterh. Cyttmium Erichson. 1 sp. Hydr. seminulum Pk. 
Palpi short; third joint short; fourth joint Jarge; clava of antenne 3-jointed ; 
penultimate joint large; body very gibbous, not punctate; sternum simple. 
Herbst. 7. pl. 114. L. 
Family 5. SPH#RIDIIDZ Leach. 
SPHARIDIUM Fabr. Dermestes Linn. 7 sp. D. scarabeoides Fab. 
Mentum flat ; palpi slender; club of antenne slightly imbricated. Curt. 518. 
CERCYON Leach. Sruarivium Fabr. 61 sp. Scarab. quisquilius Linn. 
Mentum broad, flat ; palpislender; club of antenne large. Herbst. Col. 4p]. 37. L. 
f { Ca ostoma Brullé.* } ‘ : 
CYCLONOTUM Erich: ) ty. noprus Seah lsp. Hydr. orbicularis Fab. 
Mentum impressed in the centre; palpi thick ; club of antenne slighly imbri- 
cated ; antenne 9-jointed ; lobes of maxille coriaceous. Pz. 76. 13. 
Family 6. AGATHIDIIDZ Westw. (Anisotomide Steph. ). 
PHALACRUS Payk. Antsoroma p. Illig. 28 sp. Ph. corruscus Pk. 
Broadly ovate, very convex ; palpi short, filiform; third tarsal joint bilobed ; an- 
tennze remote; clava 3-jointed. Sturm. D. F. 11. pl. 30. 
EPHISTEMUS Westw. Dermestres p. Marsh. 4 sp. Der. Gyrinoides Marsh. 
Elongate, ovate, narrowed at each end; antenne approximated at the base ; club 
3-jointed ; head exposed. Steph. I. M. 2. pl. 15. 
ALEXIA Steph. Tritroma p. Germar. 3sp.  Trit. pilifera Germ. 
Very convex ; terminal joint of palpi thick, obtuse; club of antennz 3-jointed; 
head large, deflexed ; thorax short, emarginate. 
LEIODES Latr. Awntsoroma Iilig. 33 sp. Te. cinnamomea Pz. Curt. 251. 
Ovate, head exposed, moderate; legs spined; antenne remote; club 5-jointed, 
its second joint minute. 
AGATHIDIUM UIUllig, Votvoxts p. Kug. 15 sp.  Stlpha seminulum L. 
Body globose, hemispheric; contractile into a ball; head very broad; club of 
antenne 3-jointed. Sturm. D. F. 2pl. 26. 
CLAMBUS Fisch. Pritium Schiipp. 5 sp. Dermest. armadillo D.G. 
Body broadly ovate, depressed behind ; contractile into a ball; head very broad ; 
club of antennz apparently 2-jointed ; tarsi 4 or 5-jointed. De Geer 4. pl. 8. 21. 

* T should have adopted Brullé’s name for this Genus, having the priority, but 
it has been long previously used by MacLeay, in the Annu/osa Javanica. 
