Clivina Dyschirius Elaphrus

Scientific Name Distribution & Ecology in Maine General Distribution (mostly from Lindroth, 1961-69 & Bousquet & Larochelle, 1993*)
Badister neopulchellus Lindroth

Actual length: 5.2-6.1 mm
Probably throughout the state, in rich graminoid-dominated marshes, though known from only a few specimens. This specimen is from Newport (Penobscot County). Transamerican from Nova Scotia west to the Northwest Territories, but apparently not known from Yukon or Alaska; south to California and Georgia.
Bembidion carinula Chaudoir

Actual length: 4.6-6.3 mm
Throughout Maine, on sandy stream, lake and pond margins; more hygrophilous than B. inaequale but often associated with it in riparian environments. This specimen is from Katahdin Lake (T3R8 WELS; Penobscot County). Throughout southern half of Canada, but not quite reaching the Pacific Coast, northwest to southern Yukon Territory; southern limits in New England, Michigan and Washington State.
Bembidion castor Lindroth

Actual length: 3.4-4.3 mm
Widespread and common throughout Maine; sandy and muddy stream banks, from small trickles to major rivers, but usually where sun hits the shore. Often mistaken for B. patruele, which is more common by quieter waters and on finer-grained substrates. This specimen is from Mercer (Somerset County). East of the Rockies, south at least to Iowa; north in Canada to Newfoundland and west to Alberta.
Bembidion inaequale inaequale Say

Actual length: 4.6-5.6 mm
Throughout Maine, on sandy stream, lake and pond margins; also on bare, sandy or silty ground, especially where damp, but often some distance from water. This specimen is from Batchelder's Grant (Oxford County). This subspecies occurs across southern Canada, from Nova Scotia west to Manitoba, and south at least to Missouri.
Bembidion levettei Casey

Actual length: 5.4-6.3 mm
Known from a few sites in the northern half of the state. This specimen is from Katahdin Lake (T3R8 WELS; Penobscot County). Across Canada from Newfoundland to the Yukon, also in Alaska. Southern limit to Colorado in the Rockies.
Bembidion punctatostriatum Say

Actual length: 6-7.5 mm
Throughout Maine, on sandy stream and river margins, generally larger bodies of water; less common than either B. inaequale or B. carinula. This specimen is from Mercer (Somerset County). More southern than B. carinula, across southernmost Canada and west to the Pacific Coast; east of the Rockies, south to Arkansas.
Bembidion quadrimaculatum oppositum Say

Actual length: 2.8-3.7 mm
Throughout Maine; on damp to somewhat dry, open ground, not always associated with water; often appears to be an ant as it scurries around. This specimen is from Athens (Somerset County). This subspecies occurs east of the Rocky Mountains, south at least to Texas, and in all Canadian provinces bordering the U.S. Another subspecies occurs west of the Rockies, north to the Yukon Territory and into Alaska.
Blemus discus Fabricius

Actual length: 4.4-5.5 mm
Introduced from Europe; commonly comes to lights. This specimen is from Belgrade (Kennebec County). In North America, first recorded in 1933. Southern Ontario & Quebec and in New Brunswick in Canada, as well as in "upstate" New York, VT and NH.
Lebia viridis Say

Actual length: 4.7-6.6 mm
Throughout Maine; common on wildflowers in late summer; often found in association with species of similarly-colored Altica (Chrysomelidae), on pupae of which it is believed to be a parasitoid. This specimen is from Beaver Cove (Piscataquis County). Throughout the U.S., south into Mexico, and across all of southern Canada. One of the most common species in the genus.
Mioptachys flavicauda Say

Actual length: 1.5-1.8 mm
Southern half of Maine, north to Madison; subcortical: under loose bark on large logs, typically conifers. This specimen is from Madison (Somerset County). Transamerican, but in Canada known only from Southern Quebec, Ontario and British Columbia; south to Florida and California.
Notiophilus aeneus Herbst

Actual length: 5.0-5.7 mm
Thoughout Maine, on well-drained but damp ground beneath a forest canopy or at forest margins, often in leaf litter. Note bright red legs. This specimen is from Batchelders Grant (Oxford County). Southeastern Canada, west to Ontario, Michigan and Illinois, south to North Carolina and Arizona.
Pterostichus punctatissimus Randall

Actual length: 15-18 mm
Subalpine, just below treeline in high mountains; uncommon. [Three other species in the same subgenus (P. agonus, P. costatus and P. vermiculosus) are all Arctic in distribution and restricted to tundra environments.] (This specimen was collected in New Hampshire.) Northeastern U.S. and to northern treeline (e.g., Churchill, Manitoba), in all Canadian provinces.
Schizogenius sulcifrons Putzeys

Actual length: 3.8-4.4 mm
In southwestern Maine, north to Strong; on coarse gravel stream margins, even among cobbles and small boulders. This specimen is from Strong (Franklin County). Southern limit not well known, but known to occur in NH, VT, southern Ontario, Quebec and New Brunswick.
Trechus apicalis Motschulsky

Actual length: 3.9-4.7 mm
Throughout Maine; in forest litter in dense conifer and mixed conifer-hardwood forests. This specimen is from Deer Isle (Hancock County). Transamerican, from Newfoundland to Alaska, south into New England in the east; also apparently in eastern Siberia.

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