﻿AUSTRALASIAN STILT-LEGGED FLIES — STEYSKAL 179 



21. NESTCVIA PLEURALIS. new species 



Female. — Length 10 mm., exclusive of ovipositor. Similar to Osten- 

 Sacken's description of N. poUta, although the thorax is not "uni- 

 formly dark brown, shining," but moderately pruinose on dorsum 

 with a pitchy brown, largely polished band of equal width extending 

 all around thorax, including entire pteropleura, crossing notopleural 

 suture, and including neck, humeri, and anterior face of anterior 

 hump of mesonotum. Below this band on pleura of each side is a 

 heavy stripe of appressed white hair, very narrow above fore coxae 

 and gradually widening to include entire hypopleura from middle 

 coxal to pteropleural sutures. There are several whitish sternopleural 

 bristles and 1 + 2 notopleurals. Lower part of thorax is yellow. 



Fore trochanters are black; fore femora yellow at base and at tip 

 for a distance equal to three times the width, preceded by a blackish 

 band of approximately same length; fore tibiae blackish except at 

 extreme base ; and fore tarsi whitish except two brown apical joints. 

 Middle and hind legs have tips of tibiae and entire tarsi black. 

 Halteres with brown stem and yellow knob. 



Type.— H.o\oty\)e, female, U.S.N.M. No. 58308, New Guinea: 

 Nadzab (Markliam Kiver Valley), May 14, 1944 (K. V. Krombein). 



22. NESTIMA VIRIDINSULA, new species 



Female. — ^Length 10 mm., exclusive of ovipositor. Very similar 

 to N. polita and N. pleuralis. Thorax dark brown, moderately prui- 

 nose on dorsum, blackish in a humeral stripe on each side of anterior 

 hump. Mesopleura with pitchy, shining stripe in upper part, taper- 

 ing and becoming evanescent forward. No trace of pruinosity or 

 hair on pleura anterior to hyposternopleural suture. Several whitish 

 sternopleural bristles and 1 + 2 notopleurals. 



Fore legs yellow; tibiae light brown on most of length, yellow 

 basally and whitish apically; tarsi whitish, but brownish on apical 

 two or three joints; middle and hind legs yellow, except black tips of 

 tibiae and entire tarsi. 



Halteres with brown stem and yellow knob. 



Type. — Holotype, female, U.S.N.M. No. 68307, Bismarck Islands : 

 Green Island, 1944 (W. G. Downs). 



Genus TREPIDARIOIDES Frey 



23. TREPIDARIOIDES TERRITA (Osten-Sacken) 



Calobata territa Osten-Sacken, Berliner Ent. Zeitschr., vol. 26, p. 203, 1882. 

 Trepidarioides territa (Osten-Sacken) Feet, Not. Ent., vol. 7, p. 76, 1927. — 

 Hknnig, Konowia, vol. 14, p. 307, 1935. 



