new or little-known Tipulide. 347 
margin of the eye, these marks but narrowly separated by a 
capillary median brown line. 
Prothorax black. Mesothorax black, the dorso-thoracic 
membranes light sulphur-yellow. Halteres black, the tips 
of the knobs conspicuously yellow. Legs with the coxe 
and trochanters black; femora dark brown, the tips broadly 
swollen and blackened, immediately before the enlargement 
with a narrow yellow ring ; tibiz brown, the tips broadly 
blackened ; tarsi dark brown, the base of the metatarsus 
yellow, this broadest on the hind legs. Wings narrow, dark 
brown; base of the wing and two narrow cross-bands pale, 
the first of these cross-bands before the cord, the second 
just beyond the outer end of cell lst M,. Venation: Se 
ending just before mid-length of Rs ; only the extreme base 
of R, preserved, and this in alignment with the subatrophied 
r so as to appear as a single weak cross-vein ; r—m con- 
necting with Rs before its symmetrical fork; cell Ist IG 
long and narrow, broadened outwardly, the basal deflection 
of Cu, about at the fork of M. 
Abdomen black, in the male with the posterior margins 
of the tergites very narrowly and indistinctly yellow. Ovi- 
positor horn-coloured, the valves rather long and slender. 
flab. Rhodesia (Melsetter District). 
Holotype, $, Chirinda Forest, October 1905 (G. A. K. 
Marshall). 
Allotopotype, ?. 
Type in the collection of the British Museum. 
By means of the existing keys, Paratro,eza teucholubvides 
would run to the genus Teucholabis, Osten-Sacken, but a 
comparison with certain Oriental species of Paratrcpeza, 
such as P. ornatipennis (de Meijere) and P. flavitibia, 
Alexander, convinces me that we have here to do with 
a highly specialized member of Paratropeza, which gives 
us a distinct clue as to the manner in which the reduced 
radial venation of Yeucholabis has been evolved. This is 
produced by the atrophy of the tip of 2, beyond the radial 
cross-vein and the straightening out of the base of R, into 
alignment with vr. In the Oriental species of Paratropeza, 
including P. pictipennis (Kdwards), in addition to the two 
species mentioned above, the tip of R, is preserved, but the 
entire branch is small, nearly vertical in position and often 
with the radial cross-vein inserted near the middle of its 
length. It may become necessary to relegate Paratropeza 
to subgeneric rank under Teucholabis, giving us a case 
entirely comparable to Gonomyia and its reduced subgenus 
Leiponeura. 
