Ommatius nanciae, a new species from Ecuador (Diptera, Asilidae, Ommatiinae)

A new species of Ommatius Wiedemann, 1821 is described from Ecuador. The habitus, male and female terminalia are described and illustrated.

The ampliatus group has 21 described species (Scarbrough, 2002;Vieira et al., 2011) with records from middle Mexico south to northern Argentina, three of which occur in Ecuador.Members of ampliatus group possess the middle femur with two anteroventral macrosetae; presence of a prominent preapical, posterodorsal macroseta; epandrium without a digitate preapical process and females possess apical margin of sternite VIII moderately to strongly produced, and sternite IX usually with small or large oval depressions (Scarbrough, 2002).
In this paper, a new species of Ommatius of ampliatus group from Ecuador is described.

MATERIAL AND METHODS
This study is based on the examination of specimens housed in Staatliches Museum für Naturkunde (SMNS), Stuttgart, Germany.Morphological terminology follows Cumming & Wood (2009), except for setae and macrosetae.The term "macrosetae" refers to setae relatively thick and with well-developed socket.
The techniques of Vieira (2012) were used to examine the terminalia.After examination and illustration, the detached parts were placed in microvials with glycerin and pinned with their respective specimen.The label data are cited in full, with the original spellings, punctuation, and dates.Information presented within square brackets is complementary data not included on the labels.Data from the same specimen but from different labels are separated by slashes (/).
Wing.Brown; without costal dilation; crossvein r-m before middle of cell d; R 4+5 beyond apex of cell d; microtrichia on posterior wing margin arranged in a single row; halter pale yellow.
Etymology.This species is dedicated to my mother, Nanci Marques Vieira.