Lasioglossum (Dialictus) foveolatum (Robertson)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216 : 97

Lasioglossum (Dialictus) foveolatum (Robertson)

Chloralictus foveolatus Robertson, 1902b: 250 . 3.

Lectotype. 3 USA, Illinois, Macoupin Co., Carlinville, 31.x.1901 (C. Robertson); [INHS: 23049] by W. E. LaBerge (in Webb 1980). Examined.

Dialictus supraclypeatus Mitchell, 1960: 420 . Ƥ.

Holotype. Ƥ USA, Virginia, Dunn Loring, 26.vi.1948, (K.V. Krombein); [ NMNH: 66071]. Examined.

Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) foveolatum , p. 1113 (catalogue); Mitchell, 1960: Dialictus foveolatus 3, p. 394 (redescription); Krombein, 1967: Lasioglossum (Dialictus) foveolatum , p. 463, L. (D.) supraclypeatum , p. 466 (catalogue); Hurd, 1979: Dialictus foveolatus , p. 1966, D. supraclypeatus , p. 1972 (catalogue); Moure & Hurd, 1987: Dialictus foveolatus , p. 101, D. supraclypeatus , p. 132 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) foveolatum Ƥ3, p. 132 (redescription, key, synonymy).

Diagnosis. Both sexes of L. foveolatum can be distinguished by parapsidal line deep and wide, equal to about three puncture diameters ( Fig. 15 B). Female L. foveolatum may be further distinguished by supraclypeal area strongly convex and lower paraocular area tessellate with sparse punctures (i=1–2d). They are most similar to L. ceanothi , which have parapsidal line narrow and lower paraocular punctures denser. Male L. foveolatum have mesepisternal punctures distinct, and sometimes propodeal lateral surfaces punctate, too.

Range. Southern Ontario and Connecticut, south to Georgia, west to Missouri. USA: CT, GA, IL, IN, MD, MO, NJ, VA, WI. CANADA: ON.

DNA Barcode. Available. Multiple sequences.

Comments. Uncommon.

Figures

FIGURE 15. Parapsidal line of mesoscutum, indicated by arrow, (A) narrow, (B) wide (L. foveolatum). (From Gibbs 2010 b).