Holostrophus bifasciatus (Say, 1824)

Pollock, Darren A., 2012, Review of the Eustrophinae (Coleoptera, Tetratomidae) of America north of Mexico, ZooKeys 188, pp. 1-153 : 10-11

Holostrophus bifasciatus (Say, 1824) Figures 316284066

Mycetophagus 4 maculatus Melsheimer 1806: 14 [catalogue].-( “Pennsylvania”).

Eustrophus bifasciatus Say 1824: 282.-("Inhabits United States...I obtained a specimen many years ago near Philadelphia, and we lately captured another in the North-Western Territory"); Melsheimer 1853: 143; Crotch 1873: 112; Henshaw 1885: 124.

Eustrophus 4-maculatus Melsheimer 1846: 58.- Melsheimer 1853: 143 (syn.); Leng 1920: 238; Csiki 1924: 9; Poole and Gentili 1996: 299; LeSage 1991: 246.

Holostrophus bifasciatus (Say).- Horn 1888: 36; Champion 1898: 66; Blatchley 1910: 1293; Leng 1920: 238; Csiki 1924: 9; Poole and Gentili 1996: 299; LeSage 1991: 246; Young and Pollock 2002: 416; Pollock 2008: 271, 290; Majka and Pollock 2010: 455.

Diagnosis.

Holostrophus bifasciatus is the only Nearctic species of Eustrophinae with a distinct, quadrimaculate elytral color pattern; other diagnostic features include the widely separated eyes and smooth meso- and metatibiae (without oblique ridges).

Description

(from Pollock 2008: 271) TL 4.1-5.5 mm; GEW 1.9-2.5 mm. Body elongate oval, distinctly tapered posteriorly (Fig. 3), distinctly convex dorsally (Fig. 16); dorsal color dark rufous to almost black; in most specimens, color of pronotum lighter than color of elytra; elytra with 4 yellow-red, subquadrate maculae (Figures 3, 16): anterior pair near humeri and not attaining suture, posterior pair in apical third of elytra, attaining suture in some specimens; antennomeres uniformly rufous in color, antennomere 11 slightly lighter in color than preceding articles; venter uniformly dark rufous; dorsal pubescence relatively short, inconspicuous; eyes widely separated (space> 3 × length of antennomere 1), medial margin of eye moderately deeply emarginate (Fig. 28); antennae (Fig. 28) relatively short, antennomeres 7-11 distinctly widened; antennomere 7 triangular, 8-10 distinctly wider than long; antennal sensilla completely annular; last maxillary palpomere slightly widened, subsecuriform; prosternal process (Fig. 40) elongate, spatulate distally, extended to past posterior margin of procoxae, bent dorsally at distal end; prothoracic episternal suture absent; elytral punctation fine, not arranged in longitudinal striae; meso- and metatibiae with scattered short spines, oblique ridges absent.

Distribution

(Fig. 66). The range of this species encompasses much of eastern North America, with only several records from west of the Mississippi River in the United States. The westernmost record from Canada is from northwestern Ontario. The 557 specimens examined are from the following: CANADA: NOVA SCO TIA, ONTARIO, PRINCE EDWARD ISLAND, QUEBEC. UNITED STATES: ALABAMA: Dale, Lee, Shelby. ARKANSAS: Drew, Logan, Newton, Polk, Pulaski, Washington. CONNECTICUT: Fairfield, Hartford, Litchfield, New Haven. DELAWARE: Sussex. DISTRICT OF COLUMBIA. FLORIDA: Hamilton, Liberty, Monroe. GEORGIA: Bartow, Clarke, Fulton, Jackson, Taliaferro. ILLINOIS: Bond, Carroll, Champaign, Clark, Coles, Cook, DuPage, Edgar, Kendall, Knox, LaSalle, Peoria, Putnam, St. Clair, Sangamon, Union, Wabash, Will. INDIANA: Marion, Parke, Porter, Posey, Wayne. IOWA: Johnson. KANSAS: Shawnee. KENTUCKY: Butler, Jefferson. LOUISIANA: Natchitoches. MAINE: Kennebec. MARYLAND: Baltimore, Calvert, Cecil, Dorchester, Harford, Montgomery, Prince George’s, Talbot, Wicomico, Worcester. MASSACHUSETTS: Hampden, Hampshire, Middlesex, Norfolk, Suffolk. MICHIGAN: Livingston, Oakland, Wayne. MINNESOTA: Cook. MISSISSIPPI: George. MISSOURI: Hickory, Randolph, St. Louis. NEBRASKA: Sarpy. NEW HAMPSHIRE: Hillsborough, Rockingham, Strafford. NEW JERSEY: Bergen, Burlington, Cumberland, Essex, Middlesex, Ocean. NEW YORK: Bronx, Erie, Monroe, Onondaga, Orange, Richmond, Suffolk, Queens, Tompkins, Westchester. NORTH CAROLINA: Buncombe, Gaston, Moore, Wake. OHIO: Clark, Hamilton, Franklin, Ross, Wyandot. PENNSYLVANIA: Adams, Allegheny, Armstrong, Berks, Dauphin, Philadelphia, Pike, Westmoreland. SOUTH CAROLINA: Florence, Oconee, Pickens. TENNESSEE: Chester, Cumberland, Morgan. TEXAS: Sabine. VIRGINIA: Bath, Clarke, Fairfax, Lee. WEST VIRGINIA: Berkeley, Kanawha, Lewis, Morgan, Roane. WISCONSIN: Dane, Grant, Waukesha. (Complete label data given in Appendix 1).

Types.

Eustrophus bifasciatus Say. NEOTYPE (designated by Pollock 2008), sex unknown, labeled "[faded pink circle] / E. bifasciatus Say 4-maculatus Mels.", in MCZ (LeConte collection).

Natural history.

Specimens have been collected in association with dead logs and/or associated fungi. Label data: Laetiporus sulphureus (AR); ex polypore in pine logs (AR); Trametes versicolor (AR); Schizopora paradoxa (AR); BLT (June, AL); ex polypore on cherry tree (AR); under loose pine bark (DE); under pine bark (GA); Malaise trap (March, June, GA); oak log (IL); sugar trap (May, IL); UV light (April, IL); flight trap (Aug-Sept, IL). Chantal (1985) stated that specimens have been collected from under bark of fallen Pinus strobus , on which polypores were growing; also, specimens are known from Polyporus betulinus .