492 On Aquatic Carnivorous Coleoptera or Dytiscide. 
I. 44—Genus HY DROTRUPES. 
Labial palpi very short and stout, their terminal joint subquadrate. 
660. Hydrotrupes palpalis, n. sp.— Late ovalis, parum convexus, nitidus, subtus 
ferrugineus, pectore nigricante, supra eenescens, capite antrorsum prothoracisque 
lateribus ferrugineis, antennis crassiusculis pedibusque rufis; capite thoraceque 
reticulatis, hoc margine laterali crasso, elytris crebre sat subtiliter punctatis, punctis 
seriatis fere nullis ; corpore subtus fere leevigato: tibiis anterioribus et intermediis 
extus conspicue spinosis. Long 45, lat. 23 m.m. 
T have seen only cne individual of this peculiar insect, the appearance of which 
suggests at the same time Hydrovatus and Agabus: the specimen is a male, and 
though the front and middle tarsi cannot be said to be incrassate yet the three 
basal joints bear beneath some glandular clothing. The numerous spines at the 
sides and apex of the front and middle tibize are conspicuously developed. The 
very short and thick labial palpi, will readily allow the species to be identified. 
The outline of the thorax and elytra is completely continuous. 
North America, (California ; coll. Wehncke.) 931. 
I. 45.—Genus WETRONECTES. 
Coxal lines and coxal border very obsolete, almost absent ; antennze and palpi 
short and stout ; hind coxe but little developed, short, the anterior border but 
little arched ; wings of metasternum large. 
The unique species inhabits Corsica. 
661. Agabus aubei, Perris, Abeille, VII, p. 6.—Ovalis, minus convexus, nitidus, 
niger, antennis palpis pedibusque rufis, femoribus piceis, supra obsolete reticulatus, 
elytris punctis seriatis magnis; prothorace cum elytris minus continuo, lateribus 
leviter. rotundatis, angulis posterioribus obtusis; antennis brevibus, incrassatis. 
Long. 6-7, lat. 35 m.m. 
The male distinctions are in this species extremely slight ; there is scarcely any 
incrassation of the front and middle tarsi, and only the two basal joints are furnished 
beneath with a smail patch of short glandular hairs. 
The thickened antennz and palpi of this species cause it to be very easily 
recognized. 
Corsica. 832. 
