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Sphecodes dichrous Smith, 1853
Sphecodes arvensis Patton, 1880; Halictus scabrosus Provancher, 1882; Sphecodes knetschi Cockerell, 1898; Sphecodes lautus Lovell and Cockerell, 1907; Sphecodes (Sphecodes) macfarlandi Viereck, 1909

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Sphecodes
Subgenus: None

Sphecodes dichrous, face
Smithsonian Institution, Entomology Department · 9
Sphecodes dichrous, face

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    Identification Notes: Female - Large species with similarities with S. davisii and S. ranunculi, has very strong hind tibia setae along upper edge of segment, sharp strongly angled ridge running from pronotal corner towards head, pitting on T2 dense and extending nearly to edge of rim, scape smooth relatively unhairy, with few, widely separated pits, mesepesturnum very, very heavily sculptured; pitting on the scutum well sparated with almost none touching
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Sphecodes dichrous, side
Smithsonian Institution, Entomology Department · 9
Sphecodes dichrous, side
Sphecodes dichrous, top
Smithsonian Institution, Entomology Department · 9
Sphecodes dichrous, top

Sphecodes dichrous, wing
Smithsonian Institution, Entomology Department · 9
Sphecodes dichrous, wing
Sphecodes dichrous, m on Solidag --
Michael Veit · 6
Sphecodes dichrous, m on Solidag --

Sphecodes dichrous, m on Solidag --
Michael Veit · 6
Sphecodes dichrous, m on Solidag --
Sphecodes dichrous, Barcode of Life Data Systems
Barcode of Life Data Systems · 1
Sphecodes dichrous, Barcode of Life Data Systems

Sphecodes dichrous, dor.hab
© Copyright Hannah Gaines 2009 · 1
Sphecodes dichrous, dor.hab
Sphecodes dichrous, head
© Copyright Hannah Gaines 2009 · 1
Sphecodes dichrous, head

Sphecodes dichrous, lat.hab
© Copyright Hannah Gaines 2009 · 1
Sphecodes dichrous, lat.hab
Identification
Extracted from: Mitchell, T. 1962. Bees of the Eastern United States, I. North Carolina Agricultural Experiment Station. 1-191.

FEMALE-Length 9-10 mm.; head and thorax black, abdomen ferruginous, more or less suffused with black; head much broader than long; eyes subparallel; clypeus broad and rather short, convex, but with the median area somewhat flattened; labrum subtriangular, the apex rather narrowly rounded, blackish; mandibles with a distinct, inner, subapical tooth, reddened apically, piceous basally; antennae black basally, the flagellum brownish-piceous, basal segment slightly broader than long, 2nd and following segments about as long as broad; lateral ocelli slightly nearer each other than to eyes; face below ocelli dull, very coarsely, closely and deeply punctate, punctures becoming almost crowded between antennae and eyes, those on supraclypeal area somewhat irregular, more distinctly separated but quite close along lower margin, those along clypeus coarse, deep, irregular, relatively sparse except in center; vertex somewhat shining, with rather sparse, scattered punctures between eyes and ocelli, becoming irregularly striate along posterior margin, and quite coarsely striate on cheeks, these becoming somewhat smooth on lower surface; wings lightly infuscated, with the usual three submarginal cells, veins and stigma brownish-piceous; tegulae ferruginous posteriorly, becoming yellowishhyaline anteriorly; legs blackish in general, becoming more or less reddish-testaceous apically; scutum and scutellum somewhat shining, punctures coarse and deep, rather widely separated over most of scutum, even anteriorly in center, becoming somewhat closer laterally, irregularly scattered and rather sparse on scutellum; pleura coarsely reticulate, becoming somewhat more striate below; dorsal area of propodeum coarsely and completely striate medially, lateral faces relatively smooth but dull, becoming more coarsely reticulate below, posterior face reticulate; abdominal terga smooth and shining, quite deeply and distinctly punctate, basal tergum with scattered, irregular punctures across mid portion, those on terga 2-4 covering most of discs quite fully, but the apical impressed margin becoming entirely impunctate along rims, more or less yellowish-hyaline.

MALE-Length 9 mm.; entirely black; head only slightly broader than long; eyes slightly convergent below; clypeus broadly convex; mandibles entirely black, antennae entirely black, scape very short, basal segment of flagellum very short, much broader than long, 2nd fully twice this length, 3rd and following segments with semicircular, basal, densely pilose facets beneath, these becoming more extensive on the more apical segments; lateral ocelli considerably nearer to each other than to eyes; lower part of face obscured by dense, white pubescence, but clypeus coarsely, deeply and very closely punctate beneath pubescence, punctures above antennae coarse, deep and very close, becoming somewhat more distinctly and widely separated on vertex between eyes and ocelli where the surface is dull, hind margin becoming coarsely reticulate; cheeks reticulate above, becoming more coarsely rugoso-striate toward lower surface which is dull, obscurely roughened; wings hyaline, becoming faintly clouded apically, with the usual three submarginal cells, veins brownish-testaceous, stigma more piceous; tegulae piceous to black, anterior margin more hyaline, anterior half rather closely and distinctly punctate; legs black, the more apical tarsal segments somewhat brownish; scutum and scutellum somewhat shining between coarse and deep punctures, these slightly separated over central area of scutum, but becoming wry close both laterally and posteriorly, the anterior margin becoming densely rugose, punctures on scutellum slightly separated except along anterior margin; pleura coarsely reticulate; dorsal area of propodeum coarsely and completely rugoso-striate, lateral faces more finely substriate anteriorly, becoming reticulate posteriorly, the posterior margin finely reticulate below, more coarsely so above; abdominal terga somewhat shining between deep, distinct and close punctures, only the narrow, apical, impressed rims impunctate, these concolorous with the more basal portions of discs; gonostyli (fig. 117), quite robust, somewhat compressed, with a broad inner membranous flap which bears a quite dense, apical tuft of setae, much exceeding penis valves.

DISTRIBUTION-Minnesota to Nova Scotia, south to Missouri and Georgia; April to September.

FLOWER RECORDS-Ceanothus, Chrysanthemum, Melilotus, Solidago and Taraxacum. Robertson (1929) records dichrous (as Sphecodes arvensis) on the following : Asclepias, Cacalia, Cicuta, Claytonia, Clematis, Comandra, Cryptotaenia, Eryngium, Euphorbia, Heracleum, Oxypolis, Pastinaca, Potentillu, Prunus, Pycnanthemum, Rhus, Rubus, Salix, Sassafras, Sium, Strophostyles, Symphoricarpus, Taenidea, Viburnum and Zixia.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Apiaceae  Daucus carota @ CUIC_ENT (2)
Asteraceae  Taraxacum campylodes @ AMNH_BEE (1)
Fabaceae  Melilotus officinalis @ AMNH_BEE (1); CUIC_ENT (4)
Rosaceae  Potentilla @ AMNH_BEE (1)

Sorbaria sorbifolia @ CUIC_ENT (1)

Spiraea latifolia @ CUIC_ENT (1)
Unplaced  none 685 @ RUAC_ENT (5)
_  cucurbit @ NLA (1)

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Updated: 2024-03-28 12:20:44 gmt
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