On a new neotropical genus of the subfamily Tanypodinae (Diptera, Chironomidae).

Tórax: com 0,76 mm de comprimento e cor castanha; área escutelar castanha; posnoto castanho; pleuras castanhas; quantidade de cerdas no tórax: 23 dorsocentrais dispostas em

The genus Metriocnemus is divided into two main groups based on characters derived from the male adult and immature stages (Cranston et al 1983, Coffman et al 1986, Sæther

Phlebotomus , according to various authors), but many of these are plesiomorphies: palpal formula 1.2.3.4.5, Newstead’s spines grouped in the basal half of the palpomere III,

done between track analysis and phylogeny of the studied group is important as the generalized tracks and biogeographical nodes formed by phylogenetically-related species are

Anteromarginal setae (am); antenna (AN); apicolateral processes (AP); anal segment (AS); operculum (O); pedicel (P); pore at tubercle base (ps); respiratory organ (RO); Fourth

Mid femur on ventral surface with two long setae on basal third; posterior surface with three pre-apical setae; mid tibia with two anterodorsal setae; dor- sal and ventral surfaces

One new species of Ablabesmyia Johannsen, 1905 (Diptera: Chironomidae: Tanypodinae) from Neotropical region, with. description of adults males and

sternites IV-VIII with shagreen apparently concentrated on basal and lateral margins. Chaetotaxy of abdomen as in figures 96-98. Segment VII with 4 lateral setae, segment VIII with