Studies on Tipulidae II. 181 
aurantiaca and quadrifurca;, a little farther in poeeiloptera). All 
these differences also occur among the species of true Limnobiae. 
The forceps of the male, as I have said above, shows the same 
structure as that of Limnobia; I perceive in the different species 
some modifications of detail, which I am unable to study in the dry 
speeimens. The ovipositor of the female (poeeiloptera, quadrifurca, 
Semperi, termitina are the only species of which I have seen fe- 
males) has comparatively short and narrow valves. 
I supply the description of L. aurantica Dol. very imperfectly 
described by the author. 
Libnotes aurantiaca. 
Limnobia aurantiaca Dolesch. Natuurk. Tijdschr. vor Neder- 
landsch Indie, Deel XVII, 1858, p. 78. 
Yellow, thorax with stripes; abdomen with four brown bands; 
wings hyaline with four pale brown marks along the anterior margin. 
Long. corp. 9—10 mm. Male. 
Head yellow; antennae brownish-yellow. Thorax yellow with 
dark-brown spots or stripes; metanotum brown, with yellow median 
line and tip. Halteres yellow, knob brown. Abdomen reddish yellow; 
on each of the segments 3—6 a brown band not touching the poste- 
rior margin. Legs yellow, tip of femora brown. Wings almost hya- 
line, very slightly tinged with brownish-yellow; costal and first lon- 
gitudinal veins yellow, the other veins yellowish-brown; more brown 
around the discal cell. A pale brown spot at the base of the basal 
cells reaches from the costa to the posterior margin and tinges the 
intervening veins in dark brown; a second smaller spot on the costa 
covers the root of the praefurca; a third one, still smaller, at the 
tip of the auxiliary vein; and a fourth occupies a part of the stigma, 
on both sides of the marginal crossvein. Praefurca very short, 
oblique, thus looking almost like a crossvein; 24 and 34 posterior cells 
nearly of the same length at the proximal ends; the first longitu- 
dinal vein turns at a nearly right angle towards the costa; the mar- 
ginal crossvein is less than a millimeter before its tip. Allthe veins 
ending in the apex of the wing are very much curved backwards. 
Hab. Amboina (Doleschall, 1859); a single male in the Museum 
in Vienna. 
The head and thorax being mouldy could not be described more 
in detail. But a beautiful unpublished figure in my possession (a 
copy of Doleschalls original drawing), represents the head as yellow; 
on the thorax, in front of the suture, there are four brown spots, 
connected at their inner ends; two smaller spots behinds the suture. 
12* 
