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Megachile ingenua Cresson, 1878
Megachile tephrosiana Mitchell, 1927

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Megachile
Subgenus: Xanthosarus

Megachile ingenua, female, face
Smithsonian Institution, Entomology Department · 9
Megachile ingenua, female, face

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Megachile ingenua, female, side
Smithsonian Institution, Entomology Department · 9
Megachile ingenua, female, side
Megachile ingenua, female, top
Smithsonian Institution, Entomology Department · 9
Megachile ingenua, female, top

Megachile ingenua, female, wing
Smithsonian Institution, Entomology Department · 9
Megachile ingenua, female, wing
Megachile ingenua, female, mandibles
© NC Agriculture State Experiment Station Technical Bulletin Number 152, T. B. Mitchell, 1962 · 1
Megachile ingenua, female, mandibles
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 13-15 mm.; entirely black, including tegulae and legs, spurs more brownish-piceous; eyes subparallel; clypeal margin about straight, the rather broad, median area narrowly shining and impunctate; mandibles very broad, 4-dentate, but inner tooth very broadly truncate (fig. 43); lateral ocelli subequally distant from eyes and margin of vertex; cheeks much broader than eyes; vertex shining, punctures quite deep and distinct, rather fine, quite close medially, well separated to almost sparse laterally, becoming minute and close on cheeks below; face below ocelli with densely crowded punctures, rather fine medially, becoming minute laterally, supraclypeal area and clypeus with a median, shining, impurctate area, becoming very closely and deeply punctate on each side; pubescence short but rather copious and entirely pale around antennae and sides of face, somewhat thinner on cheeks below, quite dense, entirely white on thorax laterally and posteriorly, vertex with very short, erect, piceous or blackish pubescence; scutum with copious, erect but rather short, blackish pubescence across posterior half and scutellum with considerable erect, more elongate, dark pubescence; scutum and scutellum shining, punctures minute on scutum medially, rather widely separated, becoming more distinct around margins, median punctures of the scutellum rather sparse and minute, becoming quite close laterally, axillae very finely and closely punctate; pleura rather dull, punctures densely crowded, becoming minute above; propodeum smooth but very dull, with only very minute, shallow and rather vague punctures evident; all basitarsi shorter and somewhat narrower than their tibiae; tegulae somewhat shining, impunctate posteriorly but with scattered, minute and irregular punctures toward anterior margin; wings subhyaline, veins brownish-testaceous; abdominal terga 2 and 3 quite deeply grooved across base, basal margin of groove distinct, only obscurely carinate, 4 and 5 slightly impressed toward the base but not definitely grooved, apical margins of terga narrowly depressed, with dense, whitish fasciae that are entire on 2-5, discal pubescence very short but copious and black, tergum 1 with more erect, loose, entirely white pubescence; punctures fine, slightly separated medially on all terga,becoming, quite close at extreme sides; tergum 6 nearly straight, with abundant, erect, black pubescence visible in profile, punctures very fine and densely crowded; sternum 6 quite uniformly, densely covered with short, black, scopal hairs; scopa otherwise pale yellow, but with a few, elongate black hairs at extreme sides on sterna 3-5, and 5 with an additional row of black hairs across posterior margin, the more basal sterna densely and finely punctate, punctures becoming somewhat coarser on the more apical sterna, sternal fasciae not evident.

MALE — Length 10-12 mm.; black, including tegulae, and legs in large part, anterior tarsi yellow, and spurs yellowish-testaceous; eyes subparallel; clypeal margin nearly straight; mandibles 4-dentate, with an acute, basal, inferior process, lower margin with small, submedian angle; apical segment of flagellum not appreciably dilated; lateral ocelli subequally distant from eyes and margin of vertex; cheeks much broader than eyes, slightly excavated below, posterior margin of this produced as a rather stout, pubescent tubercle; punctures of vertex quite deep and distinct, rather fine, close medially, becoming very slightly separated laterally, but very fine and densely crowded on cheeks below, a transverse shining line on lower part of cheeks that margined on each side by a rather dense, fringe of short, white hairs; face below ocelli very finely and quite densely punctate, the more lateral areas and supraclypeal area with minute and densely crowded punctures, clypeus narrowly impunctate toward base medially, becoming closely and very finely punctate on each side and toward apical margin; pubescence yellowish-white, quite copious and elongate around antennae and lower part of face, becoming snowy white on cheeks below, rather dense but shorter and thinner above, vertex with intermixed, elongate, white hairs and very short, fuscous hairs; pubescence whitish and quite copious on thorax laterally and posteriorly, scutum with intermixed dark and light hairs on posterior half; punctures scutum quite deep and distinct, uniformly close, only slightly separated in center, scutellum rather sparsely punctate in mid-line but rather closely so on each side, punctures of axillae very fine and crowded; pleura rather dull, punctures rather fine and densely crowded, becoming even finer above; propodeum smooth but dull, with only vague, minute, and irregular punctures evident; front coxal spines short but distinct, conspicuously divergent, subtriangularly carinate, not much longer than the breadth at base, coxae with considerable dense, white pubescence anteriorly but without ferruginous bristles; midtibial spurs well developed; front basitarsi very slightly dilated toward apex but rather deeplyexcavated, entirely yellow, the excavation more or less reddish, following tarsal segments short but yellow and slightly dilated, with rather thin, posterior, whitish fringe; tegulae shining, with only exceedingly minute and rather sparse punctures except along anterior margin; wings subhyaline, veins brownishtestaceous; abdominal terga 2 and 3 rather deeply grooved across base, basal margin of each somewhat carinate, 4 and 5 somewhat depressed at base but hardly grooved, apical margins of the terga shallowly depressed, with whitish apical faseiae, these more or less interrupted in the more basal terga; tergum with elongate, rather thin, entirely whitish pubescence, that on 2 also somewhat elongated and entirely white, discs of 3-5 black pubescent, this rather short but erect and quite dense; punctures of terga very fine, rather widely separated medially, becoming somewhat closer at extreme sides, tergum 6 shining, punctures exceedingly minute and vague, carina consisting of a pair of more or less triangular lateral protuberances which delimit a median, triangular emarginate area, these protuberances irregularly serrate in part, median teeth of apical margin rather small, subcarinate, somewhat nearer lateral angles than to each other, lateral teeth not evident; tergum 7 transverse, rather short, slightly and shallowly excavated, rounded apically; sterna 1-4 exposed, shining, very minutely and quite sparsely punctate especially on the more apical sterna, apical margins depressed and somewhat hyaline, but not fasciate; setose area of sternum 5 reduced, widely separated from the scierotized basal and lateral areas by a more membraneous region, finely setose (fig. 44); sternum 6 with a pair of densely setose areas that nearly meet medially, apical lobe quite broad, short medially, lateral angles conspicuously produced; gonocoxites abruptly constricted above base, subacute apically, with a ventral, subapical protuberance (fig. 45).

DISTRIBUTION—Illinois to Pennsylvania, south to Florida, March (in Florida)July.

FLOWER RECORDS—Lupinus, Tephrosia and Vaceinium.

Names
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FamilyScientific name @ source (records)
Fabaceae  Cracca virginiana @ UCRC_ENT (5)

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Updated: 2019-10-14 08:25:22 gmt
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