Hubbard and Schwarz. ] 
Harpalus herbivagus Say. 
laticeps Lec. Lake Huron 
basilaris Kby. A. H. 
Stenolophus fuliginosus Dej. 
plebejus Dej. 
conjunctus Say. 
ochropezus Say. 
hydropicus Lec. 
carus Lec. 
Trechus micans Lec. 
Bembidium americanum Dej. 
chalceum De}. 
striola Lec. 
lucidum Lec. 
patruele Dej. 
variegatum Say. 
versicolor Lec. 
sulcatum Lec. 
anguliferum Lec. 
cautum Lec. 
assimile Gyllh. 
4-maculatum Linn. 
pedicellatum Lec. 
Tachys proximus Say. 
leevis Say. 
nanus Gyllh. 
flavicauda Say. 
vivax Lec. 
xanthopus Lec. 
incurvus Say. 
HALIPLIDA. 
Haliplus fasciatus Aub. 
punctatus Aub.* 
triopsis Say. 
borealis Lec. M. 
cribrarius Lec. 
Cnemidotus edentulus Lec. 
DYTISCIDZ. 
Hydrovatus cuspidatus Germ. 
Hydroporus inezqualis Fabr. 
convexus Aub. 
turbidus Lec. 
nubilus Lec. 
646 
[April 18, 
Hydroporus granarius Aub. 
lacustris Say. 
fuscatus Cr. 
flavicollis Lec. 
rotundatus Lec. 
griseostriatus DeG. A. 
undulatus Say. 
mixtus Lec. 
modestus Aub. 
dichrous Melsh. 
Hydroporus americanus Aub. 
tartaricus Lec. 
tristis Payk. 
oblitus Aub. 
conoideus Lec. H. 
laccophilinus Lec. n. sp. 
Suphis semipunctatus Lec. n. sp. 
Laccophilus maculosus Germ. 
fasciatus Aub. 
Acilius semisulcatus Aub. 
Thermonectes basilaris Harr. A. 
Graphoderes cinereus Linn. H. 
Hydaticus stagnalis Fab. H. 
piceus Lec. 
Colymbetes sculptilis Harr. 
Dytiscus Harrisii Kby. 
fasciventris Say. 
Rhantus binotatus Harr. 
tostus Lec. 
Ilybius picipes Kby. 
biguttulus Germ. 
fraterculus Lec. 
ignarus Lec. H. 
Matus bicarinatus Say. 
Coptotomus interrogatus Fab. 
Copelatus glyphicus Say. 
Ilybiosoma bifarium Kby. H. 
Gaurodytes disintegratus Cr. A. 
semipunctatus Kby. 
ovoideus Lec. H. 
punctulatus Aub. 
gagates Aub. 
GYRINIDZ. 
Dineutes emarginatus Say. 
discolor Aub.* 
