On Aquatic Carnivorous Coleoptera or Dytiscide. 371 
¢Prosternal ) 
process not | 
touching — -— = ANDEX 
metaster- (Vide below). 
num. J 
| ( (Last joint of) 
| front tar- 
| | so el ae C@LHYDRUS 
Tkeren nar-| Terminal joint| as long as (Vide p. 373.) 
pee Alain of front tar- the third P. : 
et te | sus elongate ;| joint. J 
3 5 intercoxal 
Lois! Tenenggen rocess  of4 (Elytra with- 
of first vent- P y 
mer rik: | | metasternum | 7 <4 soint of | Out, definite | PRIMOSPES 
ae 8 ania Prosternal not connect- | Ras ar | genicular f (Vide p. 372.) 
process ing with me- | fossa. J 
very slender Hara bain | aera | sus twice | 
and neces- : as long as 2 
: ; metaster- | fork. ooh Elytra with ) 
ad en | num | az diSInts eeenitolge | MOROP MPL OS 
Z | L nicularfossa } (Vide p. 372.) 
parallel. at shoulder | 
| ofepipleura. 
Terminal joint) 
of front tar- 
sus short ; | 
intercoxal |! 
process of me- ° 
tasternum | 
touching me- | 
_ HYPHYDRUS 
(Vide p. 374.) 
sosternal 
fork. 
ooo 
cof 
I. 25—Genus ANDEX. 
Prosternal process abbreviate ; its concealed extremity not extending outside 
the middle coxz, and not reaching the metasternum. Prothorax much narrower 
than the after-body, so that the outline at the shoulders is very interrupted. 
A single South African species is the only one yet known. 
328. Andex insignis, n. sp.—Depressiusculus, subopacus, sine pubescentia, capite 
nigricante anterius ferrugineo, thorace ferrugineo, medio maculis duabus vage 
fuscis, elytris obscure ferrugineis, pectore abdomineque nigris, hoc apicem versus 
ferrugineo ; antennis pedibusque rufescentibus ; thorace elytrisque sparsim subtiliter 
punctatis, illo medio ante basin transversim depresso ; pectore abdomineque opacis 
sed vix punctatis. Long. 54, lat. 3 m.m. 
TBANS. ROY. DUB. SOC., N.S., VOL. IL are 
