INSECTS. APTERA. 121. Onlfcus. . 
771 
**Uatin Shell ventricofe : tail iaflefted lamellate : antennx 2. 
In llagnant water. Mull. Entom. iah, g.fg. 4—6. 
SMI convex : eyet green : legs capillary: tail with a broad ferrate 
lamina beneath and 2 fpines at the tip. 
ionellui, SheJi gibbous before : tail inflefted ferrate ; aotennae 4. 
In Ditches. Mull, Entem.p. 74. tab. \o.Jig. 5, 6. 
5 fo//ciliate, with a lharp probofcis ; antennts with 3 bridles at 
the tip ; o-varitt black. 
’’'•ncatus. 
^’’S^rojiris 
Shell ovate and toothed behind : tail inflefled ferrate : an- 
tennx 4. 
In dagnant water. Mull. Entom, iah. l 4 *“®* 
Shell obliquely driate, ciliate before and ferrate behind ; tail 
broadilh and ending in a claw. 
Shell roundifli : tail inflefled : fhell prickly on the fore- 
part. 
In rivulets. Mull. EntomoH. p. tab. lo. ^g. 7—8. 
Prohofeis longer than the head, curved and fubulate, 
‘‘<^i-ourus. Shell oblong: tailftraight: antennx 4. 
In Lakes. Mull. Entam^p. JJ.tab. lO. fig. 1—4. 
5(6#// pellucid whitifti : 8 : ra ;7 lanceolate. 
Shell ovate: tail projecting curved : antennx 2. 
In mod waters. Mull, Entem,p. ']%, tab, (y, fig, 
Shell pellucid without ttrix teeth or fringe.- kgs 4: r«//bicnf- 
pidate at the tip, 
121. ONISCUS. Jaw truncate denticulate; 
, bifid: antennae fetaceous, 2-4: body 
oval, confining of about 14 tranfverle 
fegments: legs 14. 
Thefe feed on animal and vegetable matter and cad their fkin* 
A. Feelers o: antenna often fejfle: Cytnothoa. 
'^^ad^xus. Segments of the body falcate and fpinous. 
\xea-Pa\Xs, Terra del fuego: large. 
Boiy broad deprefled ; antenna 4 : eyes z, in the fird fegment ; 3 
lad fegments narrower, and hardly dilated : tail large ovate 
with 3 raifed dorfal lines, with an obtufe lamina each fide at 
the tip. 
3 E 2 
Jmhricatut. 
