p.7

15
Coleoptera Sp. Jr. Vol 2

Dytiscus Lin Lat
fimbriolatus Say. Melsh Allenuated before, blackish green above; thorax & elytra yellowish on the outer margin the latter with three series of punctures 1 1/5
verticolis, S. Suboval, above blackish with greenish reflections; thorax and elytra margined with yellowish, the latter with an oblique subterminal line. 1 3/5 Mass
mediatus S. Blackish, punctured, beneath black; thorax with a yellowish band and margin; elytra fasciated behind. 1 1/12 Mass?
toeniolis S. (D. pictus Melsh) Blackish; thorax margined each side with rufous; elytra covered with confluent black points, three acute pale rufous longitudinal lines on each elytron 1/2. [placement?-colymeldentis?]

Colymbetes Ctairville (Dytiscains Melsh.)
erytropterus, S. Black; elytra dark reddish brown, margin & base paler; feet towards the tips piceous body rounded behind 2/5
fenestralis S. Black, slightly bronzed; elytra 4 spotted, anterior parts obsolete terminal ones distinct, beneath piceous-black Mass. 2/5 (biguttalus German)
ambiguus S. Black; elytra dark reddish brown; feet rufous; body somewhat acute behind, vertex with obsolete piceous spots.
seriatus S. Black immaculate slightly purple bronzed; elytra with about three irregular series of punctures on each lateral edge of the thorax rectilinear. 7/20.
nitidans L. Black; elytra with about 3 irregular series of punctures on each; lateral edge of the thorax anguated each side. 3/10
bicarinatus S. Reddish brown, punctured; sternum bicarinated. 3/10 Mass
(venustis S.) Pale rufous, beneath testaceous; elytra blackish lineated with whitish 3/10 C interrogatus Fab. Mass (Harris preferres Says name) p 22
glyphicus, S. Dark brown or blackish; elytra profoundly striated 1/5
obtusatus S. Black; elytra 4-spotted punctured 3/10 Mass
stagminus S. Oval, black, beneath rufous; ventex with two piceous spots
elytra with a sub-marginal whitish line behind. 7/20.

Lacophilus Leach (Dutiscas Melsh)
maculosus S. Yellowish testaceous; elytra blackish lineated & spotted with white. 1/4 Mass
proximus S. Yellowish testaceous; elytra blackish obtusely spotted with dull whitish. 3/20.

Hydroporus Blairville (Dusticas Melsh)
undulatus S. Ferruginous; elytra trifasciate with black 3/20
oppositus S. Blackish; head & base of the thorax ferruginous elytra with six whitish marginal spots or sub-fascia 3/20
niger S. Black, villoses, obscure, immaculate; head & lateral margins of the thorax & elytra obscure rufous. 3/20 Mass.
catascopium S. Black, obsolete, spotted & lineated with rufous; feet rufous. 3/20 Mass.
lacustris S. Rufous obscure; a a common, impressed, longitudinal line each side on the base of the thorax & elytra. 1/20
affinis S. Rufous, obscure; a common impressed longitudial line each side of the base of the thorax & elytra; elytra varied with longitudinal black lines. 1/20 Mass.

Hydrocanthus Say.
iricolor S. Ferruginous; elytra dark reddish brown iridescent, attenuated behind. 3/20.

15
Coleoptera Sp. Jr. Vol 2

Dytiscus Lin Lat
fimbriolatus Say. Melsh Allenuated before, blackish green above; thorax & elytra yellowish on the outer margin the latter with three series of punctures 1 1/5
verticolis, S. Suboval, above blackish with greenish reflections; thorax and elytra margined with yellowish, the latter with an oblique subterminal line. 1 3/5 Mass
mediatus S. Blackish, punctured, beneath black; thorax with a yellowish band and margin; elytra fasciated behind. 1 1/12 Mass?
toeniolis S. (D. pictus Melsh) Blackish; thorax margined each side with rufous; elytra covered with confluent black points, three acute pale rufous longitudinal lines on each elytron 1/2. [placement?-colymeldentis?]

Colymbetes Ctairville (Dytiscains Melsh.)
erytropterus, S. Black; elytra dark reddish brown, margin & base paler; feet towards the tips piceous body rounded behind 2/5
fenestralis S. Black, slightly bronzed; elytra 4 spotted, anterior parts obsolete terminal ones distinct, beneath piceous-black Mass. 2/5 (biguttalus German)
ambiguus S. Black; elytra dark reddish brown; feet rufous; body somewhat acute behind, vertex with obsolete piceous spots.
seriatus S. Black immaculate slightly purple bronzed; elytra with about three irregular series of punctures on each lateral edge of the thorax rectilinear. 7/20.
nitidans L. Black; elytra with about 3 irregular series of punctures on each; lateral edge of the thorax anguated each side. 3/10
bicarinatus S. Reddish brown, punctured; sternum bicarinated. 3/10 Mass
(venustis S.) Pale rufous, beneath testaceous; elytra blackish lineated with whitish 3/10 C interrogatus Fab. Mass (Harris preferres Says name) p 22
glyphicus, S. Dark brown or blackish; elytra profoundly striated 1/5
obtusatus S. Black; elytra 4-spotted punctured 3/10 Mass
stagminus S. Oval, black, beneath rufous; ventex with two piceous spots
elytra with a sub-marginal whitish line behind. 7/20.

Lacophilus Leach (Dutiscas Melsh)
maculosus S. Yellowish testaceous; elytra blackish lineated & spotted with white. 1/4 Mass
proximus S. Yellowish testaceous; elytra blackish obtusely spotted with dull whitish. 3/20.

Hydroporus Blairville (Dusticas Melsh)
undulatus S. Ferruginous; elytra trifasciate with black 3/20
oppositus S. Blackish; head & base of the thorax ferruginous elytra with six whitish marginal spots or sub-fascia 3/20
niger S. Black, villoses, obscure, immaculate; head & lateral margins of the thorax & elytra obscure rufous. 3/20 Mass.
catascopium S. Black, obsolete, spotted & lineated with rufous; feet rufous. 3/20 Mass.
lacustris S. Rufous obscure; a a common, impressed, longitudinal line each side on the base of the thorax & elytra. 1/20
affinis S. Rufous, obscure; a common impressed longitudial line each side of the base of the thorax & elytra; elytra varied with longitudinal black lines. 1/20 Mass.

Hydrocanthus Say.
iricolor S. Ferruginous; elytra dark reddish brown iridescent, attenuated behind. 3/20.