Reprinted with permission from: Rightmyer, M.G. A Review of the Cleptoparasitic Bee Genus Triepeolus (Hymenoptera: Apidae)
TRIEPEOLUS RUGOSUS MITCHELL
(Figs. 198–200)
Triepeolus rugosus Mitchell 1962: 482–483, Fig. 112 [Holotype: Florida State Collection of Arthropods; female, Highlands Hammock State Park (Highlands Co.), Florida; 31 March 1956].
Description.—Length ca. 8.5–10 mm; ITW 2.0–2.6 mm. Integument black; dorsum of mesosoma and metasoma with bands of setae pale gray to white. Clypeus elongate, lacking midline and larger punctures; covered with sparse white setae. Paramedian band clearly separated from other pale setae on mesoscutum, narrow, reaching anterior margin of mesoscutum and curving slightly outwards anteriorly. Mesoscutum and scutellum shining. Scutellum moderately bigibbous (holotype scutellum somewhat extended posteriorly); axillar spine triangular, reaching or almost reaching midpoint of scutellum. Mesepisternum with dense, erect, simple setae; punctures deeply impressed and generally separated by ca. one puncture diameter, with integument between raised, almost tuberculate; with branched, white setae on dorsal third. T1 discal patch transversely ovate to rectangular, ATB interrupted medially, but T2 and distal terga with transverse bands of pale setae continuous (notched slightly on T2); T2 with LLB forming weakly acute angle with ATB (mostly on lateral surface of T2). Female: Pseudopygidial area subquadrate to subovate, with basal region of silvery reflectance strongly differentiated from relatively long, coarse setae on rest of disk; metasoma with sparse white setae on all sterna, denser apically on S2–S4; S5 straight along length. Male: Unknown.
Comments.—This species is distinguishable from the other species with pale gray metasomal banding by the elongate face and erect, simple setae on mesepisternum, and from T. donatus by the rugose mesepisternum. The male of T. rugosus is currently unknown; the mesepisternum may not be as distinctly rugose in the males as in the females of this species. Thus, it may be that the males of T. rugosus and T. donatus cannot be separated based on the rugosity of the mesepisternum, given that the mesepisternum is sexually dimorphic in at least one other species of Triepeolus (i.e., T. pectoralis, in which the female mesepisternum is very sparsely punctate and the male is much more densely punctate and setose).
Distribution.—USA: Florida, New Jersey.
Floral Records.—Pontederia sp.
Seasonal Records.—3 March to 9 July.
Specimens examined.—7 female (GAINESVILLE, LAWRENCE, LOS ANGELES, RALEIGH, WASHINGTON D.C.).
FEMALE—Length 10 mm.; entirely black, with only the tegulae and apical segments of legs somewhat tinged with red; basal segment of flagellum slightly shorter than segment 2, median segments only very slightly longer than broad; space between margin of vertex and lateral ocelli subequal to their diameter; cheeks about half width of eyes, slightly narrower below, hind margin carinate; median length of labrum equal to half the breadth, apical margin with a pair of submedian, very minute denticles; posterior margin of scutellum broadly outcurved, broadly and shallowly impressed medially, free part of axillae short but rather widely divergent from sides of scutellum, tips hardly reaching mid transverse line (fig. 112); wings rather deeply infuscated, with the usual three submarginal cells, veins piceous to black; median area of face with considerable whitish pubescence, this more elongate and more erect above antennae, appressed and rather dense below, extending thinly over clypeus, cheeks with rather thin, appressed tomentum; margin of pronotum whitish tomentose, this continuing as a fringe around margin of tubercles, pleura rather thinly whitish tomentose above; scutum with a pair of very narrow, anterior lines of pale tomentum on each side of midline, and with a very slight amount along lateral margins and in scutello-mesothoracic suture; metanotum and adjacent margin of scutellum rather densely pale tomentose, with a quite dense tuft of elongate, whitish hairs at each extreme side, posterior to wing bases; posterior face of propodeum quite densely white tomentose, dorsal triangle largely bare; anterior face of basal abdominal tergum densely white tomentose, this continuous at each extreme side with a rather broad, subapical tomentose fascia which is slightly interrupted medially, the resulting median, black, tomentose patch very broad and quite short; terga 2-4 with transverse, apical fasciae, these very slightly removed from rims on 2 and 3, tergum 2 with a broad patch of white tomentum on each extreme side; tergum 5 densely white tomentose on each side of pseudopygidium; tegulae very minutely and closely punctate throughout, only the very narrow outer rim impunctate punctures of face below ocelli deep, distinct, rather coarse, with some rather irregular shining interspaces evident, otherwise rather close, and close across vertex and on cheeks; face below antennae very minutely and densely punctate to apical margin of clypeus; scutum, scutellum and axillae quite deeply and distinctly punctate, the punctures slightly separated in large part, interspace shining; pleura very coarsely rugoso-punctate below, becoming more finely and densely so above, beneath the tomentum; discs of abdominal terga beneath the black tomentum very minutely and quite closely punctate throughout; median length of pseudopygidium about equal to breadth, apical margin quite broadly curved, surface covered with rather short, suberect, fuscous setae, these becoming very fine around basal margin; sternum 5 very broadly convex as seen from beneath.
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