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Extracted from: Cockerell, T.D.A. (1906). Somes Bees from Washington State. The Canadian Entomologist pp. 277 - 282.
Female. Length about 11 mm. , of anterior wing just over 7 mm., width
of abdomen about 2.75 mm.; head and thorax black, abdomen long,
entirely bright yellowish-ferruginous,; legs black, only the small joints of
tarsi dark reddish; wings strongly brownish in the region of the cells;
flagellum stout, the apical half obscure reddish beneath; third antennal
joint longer than fourth, and somewhat longer than broad,; labrum
broad, not emarginate, nor much produced; mandibles stout and blunt,
wholly without an inner tooth; c1ypeus with very large partially-confluent
punctures. This was taken, at first sight, for S. Kincaidii, but it is not
that species. With the large size and simple and dark mandibles of
Drepanium, it combines the ordinary labrum of Sphecodes, etc. It agrees
with the description of S. Kilncaidii except as follows: Size smaller; face
with scanty dull white pubescence, but also coarse black bristles;
antennae not wholly dark; first joint of flagellum not so short,; mandibles
simple,; mesothorax with· large strong punctures on a shining ground
posteriorly, but rugose anteriorly; tegulare with hyaline margins; stigma
ordinary, not especially large; hind tarsi not all red,; second abdominal
segment with small close punctures basally,; third punctured like the
second, except that the area of small close punctures is larger. The first
segment, and the second and third except basally, have scattered strong
punctures on a very shiny ground I apex with dark hair; apical plate small
and narrow ; second submarginal cell very narrow, much higher than
broad, receiving the first r. n. near the beginning of its last third,; area of
metathorax hemispherical in outline, regularly cancellate, with a very
sharp and definite rim. By reason of the area of metathorax, the smooth
sparsely-punctured base of abdomen, etc., one is reminded of S.
arroyanus, which , however, differs from S. Columbiae by the shorter area metathorax, with much less definite cancellation, the paler hair of apex
of abdomen, the copious pale hair of face, the shining and strongly punctured anterior part of Illesothorax, the smaller and darker tegulre, etc.
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