Toxomerus incaicus Sack

Mengual, Ximo, 2011, Black-tie dress code: two new species of the genus Toxomerus (Diptera, Syrphidae), ZooKeys 140, pp. 1-26 : 13-14

Toxomerus incaicus Sack Figure 27

Toxomerus incaicus Sack 1941: 101. Type locality: Peru, Querobamba, and Bolivia [LT ♂, MTD].

Differential diagnosis.

Species with yellow face in both sexes, frontal triangle of male yellow and female frons with a medial broad black vitta. Sucutm black, green-grey pollinose with a lateral broad yellow vitta from postpronotum to scutellum. Scutellum yellow, black pilose. Legs entirely yellow except metatarsi dark brown. Wing mostly microtrichose, bare only on anterior margin of cells R, BM and CuP and cell R1 basally. Abdomen black with lateral margins yellow, tergum 1 with anterior margin yellow, and terga 6 to 9 yellow; terga 2 to 5 with a central dark pollinose macula; and terga 3 to 5 with two submedial, small, round yellow maculae.

Length

(2): body, 6.0-6.2 (6.1) mm; wing, 5.7-5.8 (5.7) mm.

Distribution.

Peru, Bolivia*.

Material examined.

1♂ 1♀ paralectotypes.

Remarks.

Toxomerus incaicus has usually medial yellow maculae on terga 3 to 5. Again, this species should not appear in the present key. However, I included this species in case darker specimens might appear with completely black abdomen with lateral yellow margins.