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Lasioglossum pectinatum (Robertson, 1890)
Halictus pectinatus Robertson, 1890; Evylaeus pectinatus (Robertson, 1890)

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Lasioglossum
Subgenus: Hemihalictus

Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax

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Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax
Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax

Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax
Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax

Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax
Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Back, MD ---.. ZS PMax

Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Face, MD ---.. ZS PMax
Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax
© Copyright source/photographer · 5
Lasioglossum pectinatum, F, Side, MD ---.. ZS PMax
Overview
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.


FEMALE—Length 8 mm. black; pubescence whitish, extremely short and thin; head considerably longer than broad; clypeus strongly protuberant, projecting fully two-thirds below suborbital line; eyes very slightly convergent below; cheeks very slightly narrower than eyes; lateral ocelli very slightly nearer margin of vertex than to eyes; face above antennae rather dull medially, with fine and close but deep and distinct punctures, lateral portions of face shining, with sparse, deep and distinct punctures; supraclypeal area protuberant, shining, punctures fine, well separated above, becoming sparse below; clypeus shining, punctures sparse, rather fine basally, apical half almost impunctate; area between eyes and ocelli shining, punctures minute, well separated but distinct; vertex medially somewhat shining, very minutely and obscurely punctate; cheeks shining, punctures minute, well separated but not sparse above, becoming quite widely separated below, ventral surface quite flat, separated from lateral surfaces by a rounded ridge, quite smooth, with only a few, scattered, obscure punctures; scutum shining, punctures rather fine, but deep and distinct, well separated but not sparse, quite evenly distributed over entire disc; scutellum shining, with a median, slight impression which is quite closely and finely punctate, the punctures on each side very sparse; pleura shining, with fine, scattered, quite deep and distinct punctures, becoming somewhat obscurely and finely striate anteriorly; dorsal area of propodeum with a rather narrow, basal fringe of fine striae, posterior portion smooth and shining, rounded, the posterior face quite densely pubescent, obscurely reticulate, the lateral carinae strongly divergent, incomplete; wings very faintly infuscated, veins and stigma brownish-ferruginous; tegulae brownish-ferruginous, with piceous blotches, anterior rim rather narrowly hyaline; legs more or less reddened, hind basitibial plate rather narrowly rounded; abdominal terga somewhat shining, punctures of the more basal terga deep, distinct, close, fine and rather evenly distributed, becoming more minute and indistinct on the more apical terga, basal fasciae inevident, discal pubescence extremely short and thin, sub- erect, entirely pale except on apical tergum where it is more brownish.

DISTRIBUTION — Connecticut, New Jersey and Maryland, to Illinois and Missouri.

FLOWER RECORDS—Physalis. Robertson (1929) records this on Circaea, Lutetianat, Cryptotaenia canadensi, Helianthus tuberosus and Physalis virginiana. Although it would appear that Robertson collected this species a number of times, it is very poorly represented in any of the collections that this writer has studied. The type has been seen, and one specimen from the U. S. National Museum, collected at Plummers Island, Maryland, July 10, 1909, on Physalis heterophyllum, by J. C. Crawford, is now on hand. This was compared with the type, in the Illinois Natural History Survey, and made a homotype. The male of peetinatus has never been recognized, but it seems possible that bradleyi, described next, is this species.


Identification
This is a large species, 8-9mm, has 2 distinct size of pits on scutum large ones and a set of MICROSCOPIC smaller ones interspersed on a relatively smooth and glossy background, the large pits spaced out relatively more than other black 2 weak veined species, There is a very distinct raised line, carina, running down from the top of the humeral angle of the pronotum and running toward the head. The humeral angle sharp and nearly 90 degrees in its angle, Terga with dense, less than 0.5 apart, large, deep pits that go nearly to the rim. Gray appressed hairs on metanotum line the anterior edge and expand out to less occupy less than 50% of the central segment. The pronotal collar has bright white appressed hairs throughout.

Names
Scientific source:

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FamilyScientific name @ source (records)
Solanaceae  Physalis heterophylla @ CUIC_ENT (9)

Physalis longifolia @ CUIC_ENT (1)

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Updated: 2017-08-18 00:15:32 gmt
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