Smithsonian Institution, Entomology Department · 1
Stelis diversicolor, face |
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Smithsonian Institution, Entomology Department · 1
Stelis diversicolor, side |
Smithsonian Institution, Entomology Department · 1
Stelis diversicolor, top |
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Smithsonian Institution, Entomology Department · 1
Stelis diversicolor, wing |
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Overview |
Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.
FEMALE—Length 8 mm.; entirely black, with no maculations, even on abdomen; face considerably longer than distance between eyes above; eyes very slightly convergent below; lateral ocelli considerably nearer margin of vertex than to each other, subequally distant from eyes and each other; clypeus nearly flat, apical margin quite straight; mandibles 3-dentate, middle tooth about midway between apical and inner teeth; cheeks considerably broader than eyes; carina of prothoracic tubercle barely evident; tegulae rather small, shining, sparsely and minutely punctate; wings lightly infuscated, veins piceous to brownish-testaceous, 2nd recurrent vein terminating beyond tip of 2nd submarginal cell; apical spines of front tibiae reduced to minute angles, the mid tibiae with distinct, acute, apical spines, hind tibiae with a short, more anterior spine and a posterior rounded carina; anterior spurs more testaceous, mid and hind spurs blackish; pubescence entirely pale, short and rather thin, but quite copious on sides of face, on lower cheeks, on thorax laterally, and on basal portions of legs; abdominal terga 1-4 with thin but evident, apical, whitish fasciae; punctures deep and distinct, quite coarse and close in large part, finer on sides of face and on clypeus apically, very close just above eyes but becoming more distinct on cheeks below and on vertex, coarse on pleura, becoming rather sparse below, well separated over posterior half of scutum, and very coarse and slightly separated on scutellum; propodeum with a very narrow, dorsal, pitted area; punctures of abdominal terga quite coarse, deep and distinct, rather well separated on median portions of terga 1-3, becoming closer and somewhat coarser laterally and on the more apical terga, 5 and 6 being rather coarsely rugoso-punctate laterally and across apical margin of 6; tergum 6 broadly rounded, apical margin very slightly produced and flange-like; abdominal sterna 2-4 rather coarsely and sparsely punctate across median areas of disc, 4 rather broadly incurved apically, 5 and 6 closely, deeply and distinctly punctate, 6 obtusely pointed medially.
MALE—Length 7 mm.; entirely black, with no maculations; head considerably longer than distance between eyes above; eyes very slightly convergent below; lateral ocelli nearer margin of vertex than to each other, subequally distant from eyes and each other; clypeus rather strongly convex, apical margin nearly straight; niandibles 3-dentate, middle tooth subequally distant from inner and apical teeth; cheeks considerably broader than eyes; carina of prothoracic tubercle barely evident; tegulae rather small, shining, rather deeply and distinctly but sparsely punctate; wings subhyaline, veins more brownish-testaceous, 1st recurrent vein nearly intersitial with the 1st transverse cubitus, 2nd recurrent terminating just beyond tip of 2nd submarginal cell; apical spines of front tibiae reduced to sharp angles, those on mid tibiae well developed, hind tibiae without apical spines; spurs of front tibiae more testaceous-hyaline, mid and hind spurs piceous to black; pubescence short and thin, entirely pale, rather copious but not hiding surface on face around antennae, on cheeks and over most of thorax, very short and thin on abdominal terga; punctures quite deep and distinct in general, rather coarse and distinctly separated around ocelli, on scutuni and scutellum, and over much of pleura, becoming densely crowded on clypeus and face below level of antennae; punctures rather fine but deep and distinct, well separated in median area of abdominal terga 1-4, becoming somewhat finer and closer toward the apical margins, these not at all depressed or impunctate; pubescence forming rather indistinct, apical fasciae toward sides of the more basal terga, tergum 5 very closely punctate, 6 and 7 with densely crowded punctures; sterna 1-3 exposed, somewhat shining, basal sternum slightly elevated medially, apical margin straight, narrowly hyaline, 2 rather coarsely and sparsely punctate across disc, with a central, shallow impression, margin straight and narrowly hyaline, 3 rather dull but smooth, largely impunctate, shallowly impressed medially and with a quite prominant, apical fringe of pale hairs; sterna 4-8 retracted, apical margin of 4 with a median comb of very short, robust setae, 5 also with a similar but much more restricted comb, remaining sterna as shown (fig. 14); genital armature much as in costalis (fig. 13).
DISTRIBUTION—Texas to Tennessee and North Carolina, April to June.
FLOWER RECORD—Rubus.
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Updated: 2024-04-26 19:17:33 gmt
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