Euglossa (Euglossa) insula sp. nov.

(Figs. 3 E-H)

Type material. Holotype. Male, with the following data: “ Brasil, PA [Pará], Vitória do Xingu, UHE-Belo Monte, Módulo 5, E:400597/N:9615026, 28-30.ix.2013, Nascimento, I.M.” (INPA).

Diagnosis. Male. Anterior midtibial tuft elliptic, the posterior smaller, circular, and widely isolated from the anterior, velvet area incomplete at the base, not reaching the posterior tuft.

Description. Measurements: Total length 11 mm, length of labiomaxillary complex almost three times eye length. Morphology: Labrum subquadrate, almost as wide as long, with median keel, clypeal disc tricarinate (Fig. 3e), mandible bidentate, length of labiomaxillary complex perpassing the end of metassoma (Fig. 3g), scutellum short and slightly rounded behind, corresponding lees the half its width, with faint median depression, slightly convex above (Fig. 3f), midtibiae with anterior tuft large and elliptic, the posterior smaller and circular, with velvet area incomplete at the base, not covering the entire surface of the tibia, leaving the posterior tuft isolated (Fig. 3h), hindtibiae subtriangular and inflated (Fig. 3g), SII with small, widely separated tufts. Color: Clypeal disc blue, ivory paraocular stripes complete reaching the malar area and well developed, wider at the base, forward side of the antennal scape with a small ivory spot at middle (Fig. 3e), head, torax, and metassoma predominantly metallic green, posterior margin of external face of hind legs with golden reflections (Figs. 3f, g). Pilosity: Face, gena, legs, and sterna white, vertex, pronotal lobes, scutum, and scutellum black. Punctation: Clypeal disc dense, medium to large, lower paraocular areas less dense and superficial, near ocelli strongly dense, irregular, and medium to large punctures (Fig. 3e), tegulae less dense and with small with small punctures, mesoscutum less dense and with medium punctures, scutellum sparse and with micropunctures to large, mesepisternum very dense with medium-sized and deep punctures, external face of hindtibiae less dense to sparse, with small to medium and beveled punctures posteriorly, TI-IV very dense and with micropunctures, V-VI very dense and beveled, VII dense, large and irregular.

Female. Unknown.

Geographic records. BRAZIL: Pará.

Etymology. A reference to isolated midtibial posterior tuft.

Bait. Unknown.

Comments. It belongs to the Euglossa (Euglossa) purpurea species-group for sharing with it the features defined above by Dressler (1978), being in general similar to Eg. avicula by the blue clypeal disc, but its posterior midtibial tuft is smaller, circular, and widely isolated from the anterior, making it very distinct from any other species.