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Triepeolus simplex Robertson, 1903
Life   Insecta   Hymenoptera   Apoidea   Apidae   Triepeolus
Subgenus: None

Triepeolus simplex, female
Nancy Lee Adamson · 1
Triepeolus simplex, female

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Triepeolus simplex, female2
Nancy Lee Adamson · 1
Triepeolus simplex, female2
Triepeolus simplex, female3
Nancy Lee Adamson · 1
Triepeolus simplex, female3

Triepeolus simplex, female4
Nancy Lee Adamson · 1
Triepeolus simplex, female4
Triepeolus simplex, female5
Nancy Lee Adamson · 1
Triepeolus simplex, female5

Triepeolus simplex, female6
Nancy Lee Adamson · 1
Triepeolus simplex, female6
Triepeolus simplex, female, dorsal habitus
© Molly Rightmyer · 1
Triepeolus simplex, female, dorsal habitus

Triepeolus simplex, female, ps area
© Molly Rightmyer · 1
Triepeolus simplex, female, ps area
Triepeolus simplex, female, T1
© Molly Rightmyer · 1
Triepeolus simplex, female, T1
Overview
FEMALE—Length 12 mm.; black, labrum, tegulae and more apical segments of legs suffused with ferruginous; basal segment of flagellum ferruginous, considerably shorter than segment 2, flagellum otherwise piceous below, black above, scape dark, but suffused with ferruginous at base and apex; space between margin of vertex and lateral ocelli slightly less than their diameter; cheeks slightly less than half width of eyes, somewhat narrower below, posterior margin carinate; median length of labrum slightly greater than half the breadth, apical margin with a pair of minute, median denticles; posterior margin of scutellum strongly outcurved, rather deeply impressed medially, free part of axillae rather slender and elongate, reaching slightly beyond mid transverse line of scutellum (similar to rufithorax, fig. 112); wings uniformly and rather lightly infuscated, with the usual three submarginal cells, veins piceous; face with considerable appressed, yellowish tomentum around bases of antennae, with some very thin, appressed tomentum below, and rather short but more erect hairs above; margin of pronotum, a transverse patch across upper part of pleura, a pair of elongate patches on scutum anteriorly, posterior lateral angles of scutum adjacent to tegulae, and a very narrow line along anterior margin of scutellum, densely yellowish tomentose, tubercles with a yellowish marginal fringe; metanotum and adjacent margin of scutellum rather densely yellow tomentose, with a tuft of elongate, yellowish hairs at each extreme side posterior to wing bases; posterior face of propodeum on each side of basal triangle quite densely, pale yellowish tomentose; basal abdominal tergum largely yellow tomentose, but with a transverse, median, quadrangular, black tomentose area, which is narrowly connected to the blackened anterior face, and the narrow apical rim blackened; terga 2 and 3 with subapical, broad, dense, yellow tomentose fasciae, 2 with a lateral, quadrangular, yellowish patch; tergum 4 with an apical, whitish tomentose fascia; tergum 5 with only scattered, appressed, greyish-white hairs; tegulae very finely, closely and quite deeply punctate throughout; punctures of face below ocelli deep, distinct, rather close and quite coarse, becoming rather sparse laterad of ocelli, but fine and very close across vertex posteriorly and on cheeks, lower half of face below antennae very finely and densely punctate throughout, with only very obscure, scattered, larger punctures evident on clypeus; scutum and scutellum rather finely and very closely punctate, with only scattered, very narrow, shining spaces at all evident, axillae with somewhat finer and irregular punctures; pleura rather coarsely and very closely rugosopunctate, punctures becoming finer and densely crowded above in region of the tomentose area; abdominal terga very finely and closely punctate beneath dense, black tomentum of discs, punctures becoming somewhat more evident and distinct on tergum 4, rather sparse on each side of tergum 5; pseudopygidium abruptly truncate apically, margin indefinite, median length about equal to half the apical breadth; sternum 5 strongly convex as seen from beneath.

MALE—Similar to female in most characteristics; tergum 5 with a narrow, subapical, greyish-white fascia, tergum 6 not fasciate; sternum 4 with a subapical fringe of elongate, apically curved setae, but sternum 5 rather uniformly short pubescent, lacking this apical fringe; pygidial plate strongly elevated above disc of tergum 7, transverse ridge obscure, hardly evident, margin strongly carinate, somewhat narrowed apically and narrowly rounded.

DISTRIBUTION — Wisconsin, Illinois and Michigan, to North Carolina and Georgia; July and August.

FLOWER RECORDS — Helenium and Helianthus. Robertson (1929) records simplex on Lespedeza, Pycanthemum, Silphium, Teucrium and Verbena.

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Updated: 2018-08-20 15:23:02 gmt
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