p.3

Coleptera Genera
Elaphrus Fab. Antennae hardly longer than the head and thorax, somewhat
more robust towards the hipñ external maxillary and labial palpi
with the ultimate joint subcylindrical, longer than the preceding
joint; labium profoundly emarginate;maxillae hardly ciliated on
their external side; thorax subcyclindrical; somewhat dilated in the
middle; unequally longer than broad; anterior
tibia emarginate on the inner side.

Nothiophilus, Dumeril. Antennae not longer than the head and thorax; rather more
robust towards the hip; external maxillary and labial palpi
with the terminal joint sulcylindrick, , large, and longer than the
preceding joint; labium profoundly emarginate; maxillary hardly
ciliated on their external side, thorax depressed transverse, sub=
quadrate; anterior tibia emarginate on their inner side.

Trechus, blairville. Anterior tibia emarginate; anterior and intermediate
tarsi of the male dilated; elytra and wings entire; palpi filiform, the
last joint of the exterior ones as long or longer than the preceding
joint, not narrowed at base but forming with that joint a
fusciform mass.

Dytiscus, Lin. Lat. Antennae longer than the head setaceous; scutel
distinct; three basal joints of the anterior tarsi, {in?} the male dilated,
pateliform; palpi filiform

Colymbetes, Clairville. Antennae longer than the head, setaceous; scutel
distinct; basal joints of the four anterior tarsi of the male almost
equally dilated, not pateliform; palpi filiform.

Laccophilus Leach. Antennae longer than the head setaceous; scutel none;
anterior tarsal joints of the male not pateliform; palpi filiform.

Hydrophorus Clariville. Four anterior tarsi apparently four = jointed, the
fourth joint minute and with the base of the fifth concealed
in a profound fissure of the third joint; body oval, the
breadth greater than the height; scutel none

Hydrocanthus, Say. Antennae rather longer than the head, somewhat
thicker in the middle; scutel none; maxillary palpi filiform
labiales, terminal joint dilated, subovate, compressed entire; anterior tibia mucronate, tarsal joint of the male not pateliform;
a small pectoral scale covering the origin of the posterior feet.

Halipus Lat. Antennae 10=jointed; palpi subulate; scutel none; tarsi
filiform 5=jointed, posterior thighs concealed at base by a clypeiform
scale; body oval, thick

Gyrinus Lin. Antennae shorter than the head, second joint with
a laterla process; eyes apparently four; two posterior pairs of feet dilated very much compressed.

Moneilema. Say. Elytra undivided; wings none. [near Lamia]