INSECTS. APTERA 120. Monoculus. 765 
Inhabits through rarely rivers of Germany, and glides flovvly 
along alternately on it’s back fides and bclly> and fometunes 
raifes itUlt upright. 
Body above white, beneath red: /«;'/ not jointed: kgs S. 
Antennx 2, dilated and lliort : tail bicufpidate. 
Mull. Entomofi.p. HI,, tah. 15 17. 
Inhabits Marlhes though very rarely. _ 
■Belly with 5 fegments ; anteunae branched at the bafe. 
2, minute (Iraight with 3 hairs at the tip; body 
inarticulate: hands unarmed: tail forked. 
Inhabits Sea IVaier. Mull, hntom. f. 115. mb. ^9-fS. 4 — 6 - 
AtiteniiE 2, (hort recurved : body inarticulate : hands che- 
le.te : tail forked- ' 
Inhabits Sea IVwer. Mull. Eniom. p. 1 14 - t^^b. 1—3. 
'’'‘Mcorni, AiitenncE 2, thofe cf the male hooked; tail with very Ihort 
briftles. , 
Inhabits Sea MarOics. Afl. Uafn. 9, ;>• 59 °- tab.a. fig. i—\g. 
I 
P.clcniblcs M. quadricornis 
t tHJ let 'jr f- J/ X nf O 
Antennae of the female forked at the 
tin. 
B, 
With a fitigle fjc and bivalve /hell: ante.neia; brancheS-. 
TailinOcaed: Iheil mucroiiate behind. 
Muil. Ent'imolt, n. 34 - ^al’. 4 7 - 
I.eE.-n/u iVUcTof, i.ib.eab, ']t.. fg.t.. 
Found in llagnatit waters, in inch vail numbers, tha. it appears 
fometimes covered with a red pellicle. 
PJ-ell vellovvilh: abdmnen i'nteifines and to rtKldiih : 
' thrice as hrge as me male, with 8—1 2 round green eggs: on 
, the back is a large fqitarc fpot relcmbling a laddie. 
TKil iniieacd; fhell ferrulate before and prickly behind. 
In freih Water. Mull. Entom. n. 35. tab-_ 12. fg. b— 10. _ 
Shell ovate tvnitc pellucid, ending behind in a hrong fpinc 
ferrate each fide and half as long as the .hell : legs 8. 
Tail Infleaed: fhell (Quadrangular unarmed. 
Ip fugiiant pools. Mull. E.nt. n. 36. tab. I'^.fg. 3, 4 - 
Bodf Toiirctinies red ; legs 6. 
SimtiS.. 
