Ubristes rex, Reemer, 2017

Reemer, Menno, 2017, Ubristes rex sp. n., a new microdontine hoverfly from northern Brazil (Diptera: Syrphidae: Microdontinae), Zootaxa 4362 (2) : -

Key to the species of Ubristes

The following key can be used to distinguish the species of Ubristes . For figures of the other species besides U. rex sp. n. see Reemer (2013a).

1 Abdomen partly or entirely yellow....................................................................... 2

- Abdomen black.............................................................................. U. flavitibia

2 Abdomen without fasciae of golden pile. Face ventrally weakly produced: distance between ventral eye margin and oral mar- gin maximally 1/5 of height of eye. Hind leg mixed yellow and black pilose...................................... 3

- Abdomen with fasciae of golden pile along posterior margin of tergite 3 and medially across tergite 4 (Figs 1, 8). Face strongly produced ventrally: distance between ventral eye margin and oral margin approximately 1/3 of height of eye (Fig. 4). Hind leg entirely yellow pilose........................................................................ U. rex sp. n.

3 Abdomen entirely yellow....................................................................... U. ictericus

- Abdomen brownish with yellow maculae......................................................... U. jaguarinus