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) fiill 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 (amoimting, in all, to 253), the structural and 
specijic 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. 
Enumeeatio generum systematica. 
Fam. COSSONID^. 
I. Faniculus 4-art Notiomimetides. 
(^Corpiis calcum, siihnitidmii ; ocnlis obsolefis ; coxis valde separatis ; 
tihlis ap'ice havd uncinatis ; tarsls ineudotetrameris?) 
1. Notiomimetes . . . . .-, . . Australia. 
II. Funiculus 4-art Bryoplitliorides. 
(^Corpus ant lutosum avt sntvelutlnwti, opacvni, rariss. svbnitidum ; 
ocnlis dist metis, demissis, transversis; coxis, presertim anticis,minu8 
separatis ; tihiis ajnce uncinatis ; tarsis conspicue 5-artM) 
2. Psilodryophthorus .. .. .. .. JV^ov. Guinea. 
3. Stenommatus . . . . . . . . Mexico. 
4. Dryophthorns . . . . . . . . Enropa. 
5. Tetratemnus . . . . . . . . . . ins. Japan. 
III. Funiculus 5-art Pentarthrides. 
(Tihiis apice uncinatis ; tarsis pseudotetravieris.') 
a. Oculi distincti. 
b. Corpus lutosum ; scutello lidud, vel vix, ohservando. 
6. Synommatus . . . . . . . . Borneo. 
7. Chtcrorrhinus . . . . . . . . Europa. 
8. Pentacoptus . . . . . . . . . . ins. Japon. 
9. Lyprodes . • . . . . . . . . ins. Malaycns. 
bb. Corpus {in Sericotrogo et Lcptomimi parte exceptis) calvutn ; scutello 
cons^ncno. 
10. Phloeophagomorphus . . . . . . J^'^ov. Granada. 
11. Pseudopeutarthrum .. .. .. Mexico. 
12. Xenosomatium .. .. .. .. ins. Malay ens. 
13. Pentarthrum .. .. .. .. tot. orb. terror. 
14. Sericotrogns . . .. .. .. .. Kov. Zealand. 
15. Stenotrnj)is .. .. .. .. ins. Malay., et Ant ill(C. 
