On a new neotropical species of the genus Djalmabatista Fittkau, 1968 (Diptera, Chironomidae).

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

Gonocoxal plate with long lateral arms, 0.6 times length of gonostylus, crowned with elongated bristles; with bristles on median surface of gonocoxal plate; gonostyli

Scutum subshining tan, darkening gradually from anterior to posterior region, anterior half with two narrow, diffuse and slightly darker stripes between and just adjacent to

Frons mat black; fronto-orbital plate black, weakly shining; upper dark orbit touching ovt and ivt; ocellar triangle black, greyish pollinose; lunule silvery; face greyish-brown;

Segment VIII with posterolateral brownish anal comb of 2-3 marginal teeth and 2-4 short additional ventral teeth (Fig.. Anal lobe with complete fringe of ca 70-80 taeniae and 1

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,

Fore wings blackish to dark brown; costal margin with a pale yellow spot sub-basally and sub-apically; a golden or pale yellow medial band extending from base to near apex of clavus

Drosophila peruensis Wheeler, 1959 (currently included in the guarani group) prompted the present paper and suggested the existence of one previously unrecognized Neotropical