Bembidion fugax (LeConte, 1848)

Hildebrandt, Drew A. & Maddison, David R., 2011, A new species of Bembidion Latrielle 1802 from the Ozarks, with a review of the North American species of subgenus Trichoplataphus Netolitzky 1914 (Coleoptera, Carabidae, Bembidiini), ZooKeys 147, pp. 261-275 : 271

Bembidion fugax (LeConte, 1848)

Junior synonyms.

Octhedromus planipennis LeConte, 1850; Bembidion champlaini Casey, 1918.

Diagnosis.

Most specimens can be separated from Bembidion grandiceps using the characters listed for that species. Also, specimens of Bembidion fugax have a more narrow head and pronotum and the elytral apex slopes slightly.

This species can be separated from Bembidion planum by the 6th elytral stria being as, or nearly as, impressed behind the shoulder as the 5th, and the frontal furrows are prolonged and markedly diverging behind the posterior supra-orbital puncture. In addition, Bembidion fugax has deeper furrows with steeper sides, more polished especially at the bottom, and more sharply etched at the bottom, with the raised area between the eye and the frontal furrow being more bulbous, and shinier; Bembidion planum has broad, shallow furrows, sides gently sloped, more microsculpture on the slopes and especially bottoms, not sharply etched at the bottom, and with the raised area between the eye and the frontal furrow being flatter and not as shiny. Specimens tend to be darker and slightly larger than those of Bembidion planum and in most specimens the pronotal microsculpture is weakly impressed and obsolete on the disk.

Geographic distribution.

Recorded from USA: DC, IL, IN, MA, MD, NJ, NY, OH, PA, TN, VA, VT ( Bousquet and Larochelle 1993 and R. Davidson, pers. comm.).