THE CANADIAN 
Hyprororus, Clairv. (continued.)  CoLyMBETIS, Clairv. (continued. ) 
undulatus, Say. 
sericeus, Lee. 
lineolatus, Lec. 
dispar, Lec. 
impressus, Zec. 
nubilus, Lee. 
HYDROCANTHUS, Say. 
atripennis, Say. 
LaccopHi.us, Leach. 
maculosus, Say. 
fasciatus, Aube. 
COPTOTOMUS, Aube. 
interrogatus, Faér. 
Matus, Aube. 
bicarinatus, Say. 
CoLyMBETIS, Clairv. 
biguttulus, Germ. 
GYRINUS, Linn. 
affinis, Aube. 
analis, Say. 
pernitidus, Zee. 
HELOPHORUS, Füubr. 
lineatus, Say. 
scaber, Lec. 
HYDROCHUS, Germ. 
scabratus, Aus. 
simplex, Lec. 
impressus, 2711. 
HYDROPHILUS, Geofr. 
ovalis, Ziegz. 
triangularis, Say. 
nimbatus, Say. 
striolatus, Lec. 
sublaevis, Zee. 
ENTOMOLOGIST. 
binotatus, Harr. 
AGABUS, Leach. 
punctatus, Aude. 
taeniolatus, Lec. 
semivittatus, Zec. 
ambiguus, Lec. 
Hypaticus, Leach. 
basillaris, Zec. 
ornaticollis, Lec. 
fascicollis, Harr. 
ACILIUS, Leach. 
fraternus, Lec. 
Dytiscus, Zen. 
fasciventris, Say. 
CYBISTER, L277. 
fimbriolatus, AZe/s. 
GYRINIDÆ. 
Dineutus, WcLeay. 
americanus, Say. 
discolor, Aube. 
HVDROPHILIDÆ. 
HyproriLus, Geofr. (continued. ) 
glaber, Æbsf. 
Hyprocuaris, Zafr. 
obtusatus, Lec. 
BEROSUS, Leach. 
miles, Zec. 
pantherinus, Lec. 
infuscatus, Lec. 
exiguus, Lec. 
bimaculatus, Lec. 
penguia, Lec. 
tomentarius, Lec. 
