434 Mr. T. Vernon Wollaston on the 



I will merely add that in treating the subject-matter of 

 the present memoir, it has divided itself into five parts: 



(1) A catalogue of the several groups arranged syste- 

 matically, and (so far as I have been able whilst adhering 

 to what I believe to be their natural sequence) tabulated ; 



(2) full generic diagnoses, taken seriatim ; 



(3) observations (diagnostic and geographical) on each 

 separate genus ; 



(4) brief characters of 139 species which, so far as I am 

 aware, have not hitherto been recorded ; and 



(5) a complete list of the particular members of the 

 family (amounting, in all, to 253), the structural and 

 specific features of which I have examined with the greatest 

 care, and which may be regarded consequently as the 

 material from which the paper has been compiled. 



ENUMEKATIO GENEKUM SYSTEMATICA. 

 Fam. COSSONID^E. 



I. Funiculus 4-art Notiomimetides. 



(Corpus calcum, subnitidum; oculis obsoletis ; coxis valde separatis ; 

 tibiis apice haud uncinatis ; tarns pseudotetrameris.} 

 1. Notiomimetes . . . . .* . . Australia. 



II. Funiculus 4-art DryopTitTiorides. 



( Corpus aut lutosum aut subvelutinum, opacum, rariss. snbnitidnm ; 

 oculis distinctis, demissis, transversis; coxis, presertim anticis, minus 



separatis ; tibiis apice uncinatis 



2. Psilodryophthorus 



3. Stenommatus 



4. Dryophthorns 



5. Tetratemnus . . 



tarsis conspicue 5-art.is-) 

 . . Nov. Guinea. 

 .. Mexico. 

 . . . . Europa. 

 . . . . ins. Japon, 



III. Funiculus 5-art Pentartlirides. 



(Tibiis apice uncinatis ; tarsis pseudotetrameris.} 



a. Oculi distincti. 

 b. Corpus lutosum ; scutello haud, vel vice observando. 



Borneo. 

 Europa. 

 ins. Japon. 

 ins. Malay 



6. Synommatus . . . . . . 



7. Chserorrhinus 



8. Pentacoptus . . . . 



9. Lyprodes 



bb. Corpus (in Sericotrogo et Leptomirni parte exceptis) calvum ; scutello 

 conspicuo. 



10. Phloeophagomorphus . Nov. Granada. 



11. Pseudopentarthrum 



12. Xenosomatium 



13. Pentarthrum 



14. Sericotrogus . . 

 ] 5. Stenotrupis . . 



Mexico, 

 ins. Malay ens. 

 tot. orb. terrar. 

 Nov. Zealand, 

 ins. Malay., ct Antilles. 



