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Genus - Bembidion

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum

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216 results for "Bembidion"

Bembidion levettei

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAdults of this species has been collected in May to September. IdentificationMember of the inaequale group (subgenus Bracteon). Similar to B. inaequale in color though usually with more sombre ground color (sometimes green); smooth parts of elytra purple or cupreous, as a rule; prothorax sometimes with darker disc; femora more or less reddish at base but tibiae hardly paler. Prothorax broader than in B. inaequale. It is best distinguished from this species on the sculpture of elytra; these are strongly transversely depressed behind the base and only intervals (2-) 3-5 are shiny in front of the depression; the mirror of the 7th (-8th) interval behind middle is never isolated but broadly connected with the similarly sculptured inner intervals. Length 5.4 to 6.3 mm.

Bembidion inaequale

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAdults of this species have been collected in May to July and September. IdentificationMember of the inaequale group (subgenus Bracteon). Most variable species in the group. Black, base of antennae, tibiae, and sometimes part of femora, often reddish; entire body metallic, from deep brass or green to bright cupreous. Elytra with 4th stria more or less suddenly sinuate (or interrupted) near base, intervals 1-3 (-4) more or less smooth and shiny before anterior silver spot, mirror on 7th interval (including part of the two adjacent) isolated and situated nearer posterior than anterior silver spot. Length 4.6 to 5.6 mm.

Bembidion punctatostriatum

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAdults of this species have been collected in May to July. IdentificationMember of the inaequale group (subgenus Bracteon). Largest species in the group, characterized by the braod base of the prothorax and the strong basal margin inside shoulders of elytra. Brassy, inner intervals of eltra, notably the 3rd, and often disc of prothorax, cupreous or purplish, silver spots greenish or golden; 1st antennal segment and tibiae more or less pale. Elytra with only faintest suggestion of transverse basal impression, 4th stria straight. Length 6.0 to 7.5 mm.

Bembidion carinula

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAdults of this species have been collected in June to September. IdentificationMember of the inaequale group (subgenus Bracteon). Best recognized on the well-develpoed carina at hind angles of prothorax which runs parallel with side margin and reaches the base. Coppery or greenish, rarely bluish, mirrors of 3rd interval as a rule contrasting, in green specimens often coppery, and with adjoining intervals sometimes diffusely darkened. First antennal segment red, at least underneath; legs varying but femora always reddish at base (as a rule entirely), tibiae red to piceous, except at apex. Elytra with barely preceptible transverse impression at base and 4th stria straight, basal margin inside shoulder reaching 5th stria; 3rd interval hardly twice as broad as 4th on the level of anterior silver spot. Length 4.6 to 6.3 mm.

Bembidion lapponicum

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the inaequale group (subgenus Bracteon). Similar to B. carinula but prothorax without latero-basal carina. Color duller, due to generally stronger microsculpture, usually greenish or brassy (never coppery), legs darker than in normal carinula, with femora entirely black or red only at base or, rarely, entirely piceous red. Third elytral interval almost constantly more suddenly widened before anterior silver spot which is at least twice as broad as 4th interval; the dark color of mirrors often more extended upon adjoining intervals than in carinula.

Bembidion balli

University of Alberta E.H. Strickland Entomological Museum

SeasonalityThe HOLOTYPE specimen was collected in August. IdentificationMember of the inaequale group (subgenus Bracteon). Similar to both B. carinula and B. lapponicum. Dull brass throughout, silver spots little brighter, no smooth mirrors developed, except that corresponding parts of 3rd interval may be slightly darker; 1st antennal segment and legs (except tarsi) pale as in normal carinula. Shoulder margin more or less angulate, reaching 5th stria; all striae sharp, densely punctate, intervals slightly convex, 3rd only slightly widened with small silver spots. Length 5.4 to 5.9 mm.

Bembidion coxendix

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAll of the adults were collected in June. IdentificationMember of the coxendix group (subgenus Odontium). Black, upper surface rather shiny, bronze or aeneous; 1st antennal segment and base of 2nd-4th and at least tibiae rufous. Prothorax broad and markedly cordiform; latero-basal carinula rudimentary. Elytral striae with rather strong and dense, slightly transverse punctures; intervals moderately convex. Length 4.5 to 6.7 mm.

Bembidion chalceum

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the chalceum group (subgenus Pseudoperyphus). An extremely variable species. Black with aeneous, brassy or greenish lustre, base of antennae (at least 1st segment underneath) red, legs more or less piceous with inner part of femora paler. Prothorax narrow and convex, cordiform, with reflexed sides very narrow, hind angles slightly obtuse or almost right. Elytra with deep, somplete, strongly punctate striae and more or less convex intervals. Length 4.7 to 7.3 mm.

Bembidion bifossulatum

University of Alberta E.H. Strickland Entomological Museum

SeasonalityAdults have been collected in May to July. IdentificationMember of the americanum group (subgenus Ochthedromus). Often greenish, blue, or almost black; legs usually darker, palpi and 1st antennal segment hardly paler. Somewhat dull, due to strong microreticulation which is granulate on outer elytra intervals. Prothorax with rounded sides and short sinuation before hind angle. Elytra with large, foveate dorsal punctures in the 3rd stria. Length 6.8 to 7.7 mm.

Bembidion nitidum

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the nitidum group (subgenus Eudromus). Black, very shiny due to complete lack of microsculpture on prothorax and elytra, upper surface with more or less pronounced brassy (rarely bluish) lustre; 1st antennal segment reddish (at least underneath), tibiae piceous. Prothorax with sides little rounded, latero-basal carina very sharp, running almost parallel with side margin. Basal margin of elytra arcuate, shoulder angle about right, 1st to 5th striae evidently punctate. Length 4.1 to 5.3 mm.

Bembidion interventor

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the nitidumgroup (subgenus Eudromus). Larger than nitidum, slightly dull from evident microreticulation. Color often more pronouncedly metallic, antennae with 3-4 basal segments red, at least underneath; also legs paler. Prothorax broader, with more rounded sides, basal carina diverging from side margin, usually concave inwards. Elytra with basal margin almost straight inside shoulder angle, which is obtuse; striae less abbreviated. Length 4.8 to 7.2 mm.

Bembidion dyschirinum

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the lampros group (subgenus Metallina). Black, usually with faint aeneous lustre, base of antennae (at least 1st segment below) and legs paler, reddish or piceous, but femora always darker than the tibiae which, however, have the extreme base darkened. Head with frontal furrows arcuate, no pronounced longitudinal ridge between anterior and posterior supraorbital punctures. Prothorax hardly constricted at base, latero-basal carinae long, straight, or even slightly converging at tip. Elytral striae more abbreviated in apical half, usually more finely punctured, the rudimentary 7th stria, behind shoulder, as evidently punctate as the 6th. Length 2.9 to 3.8 mm.

Bembidion lachnophoroides

University of Alberta E.H. Strickland Entomological Museum

IdentificationMember of the lachnophoroides group (subgenus Actedium). Pale, reddish brown, head and prothorax dark aeneous, elytra with very faint metallic lustre and an obsolete dark band behind the middle; antennae and maxillary palpi darkened towards tip. Length 4.5 to 4.8 mm.