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Family Halictidae Thomson (66 taxa)

Two subfamilies (Nomiinae and Halictinae) are found in Florida.  The key to genera from Mitchell is used.

Key to genera

1. Front wing with but two submarginal cells...........…     2

Front wing with usual three three submarginal cells.....4

2. a) Posterior border of second submarginal cell less than half the length of the first....Sphecodes

3. Head and thorax greenish; small (4-5mm)... Lasioglossum (Subgenus Habralictellus)

Body entirely black, very long mandibles...Lasioglossum (Subgenus Hemihalictus)

4. First and third submarginal cells subequal in length: abdominal terga often with green or testaceous apical integumental bands...Nomia

First submarginal cell about equal to second and third combined....5

5. Head and thorax and usually the abdomen also, bright, metallic green, blue, or purple; outermost wing veins well developed...6

    ;

Head and thorax black or dull metallic, or if at all bright in color, then the outermost wing veins poorly developed....9

6. Posterior face of propodeum completely encircled by a salient rim; hind tibiae equaling or exceeding their tarsi in length... Agapostemon

Posterior face of propodeum without the salient rim, at least above; hind tibiae shorter than their combined tarsal segments...7

7. Hind tibial spurs of female coarsely pectinate; labrum in male black; sternum 4 in male with greatly elongated, slender, plumose, lateral processes.....Augochloropsis

; ; 

Hind tibial spurs of female simple or finely serrate; labrum in male yellow; sternum 4 in male simple...8

;

8. Mandible in female with two nearly equal apical teeth; basal abdominal sternum of female with a median carina; apical margin of sternum 4 of male straight...Augochlora

; ;

9. Head and thorax dull metallic, abdomen usually piceous or black, but sometimes testaceous, or with metallic reflections; outermost wing veins poorly developed; apical abdominal fasciae entirely lacking...Lasioglossum (Subgenus Dialictus)

(Note: L. (Dialictus) pectorale and L. (Dialictus) macoupinense, are still listed here, temporarily, under their former subgenus Evylaeus)

Head and thorax usually black, if at all metallic, then outermost veins well developed and abdominal terga with well developed apical fasciae....10

10. Abdominal terga with apical pubescent fasciae; outer wing veins well developed.....Halictus

Abdominal terga not fasciate apically, but sometimes with basal bands of pale tomentum...11

11. Female without the usual tibiae scopa; head and thorax black, usually coarsely sculptured, abdomen usually red; gonostylus of male genital armiture broadly compressed and heavily sclerotized; outermost wing veins well developed.....Sphecodes

Tibial scopa present in female; head and thorax usually not so coarsely sculptured; outermost wing veins poorly developed in female; gonostylus of male armature not heavily sclerotized..12

12. Second intercubital vein of front wing well developed, similar to the first...Lasioglossum (Subgenus Lasioglossum)

Second intercubital vein of front wing reduced, similar to the third...Lasioglossum (Subgenus Evylaeus)