Genus Taeniorhynchus. 961 
equal to a little more than half the length of the cell, its base 
slightly nearer the apex of the wing ; posterior cross-vein longer 

Fig. 138. 
Wing of Taeniorhynchus confinnis. 2. Arribalzaga. 
than the mid, more than twice its own length distant from the 
mid ; haiteres pale ochraceous. 
Length.—) to 6°5 mm. 
Habitat.— Cara Cara Creek, Demerara River, British Guiana 
(Low) ; Trinidad (C. H. Hewlett) ; Argentina, Chaco, in Formosa 
(Arribalzaga) ; Para (Dr. Durham). 
Observations—Dr. Low has sent me specimens cf what 
are undoubtedly Arribalzaga’s Taeniorhynchus confinnis. The 
species has also been sent from Trinidad, the latter specimen 
being much darker and smaller than the British Guiana ones, 
and also those of Dr. Durham’s from Para. This species is 
evidently very variable, for some in the series show the pro- 
boscis as Arribalzaga described, 7.e., broadly pale banded ; others 
have the pale band quite narrow. It is a very marked species, 
however, with speckled legs and silvery white apical abdominal 
bands, such as occur in no other Taeniorhynchus. It is evidently 
a common South American species, but I have not yet seen it 
from Brazil. 
TAENIORHYNCHUS ARRIBALZAGAE. 0. Sp. 
Deep black and brown; proboscis with a narrow white 
band ; thorax deep brown, apparently unadorned, covered with 
narrow-curved black scales; abdomen black unbanded, venter 
with grey basal bands; legs black, fore femora with yellow band 
near apex ; fore and mid metatarsi and first two tarsi with basal 
pure white bands, all the tarsi in the hind legs with basal white 
bands ; wings with the veins densely scaled with brown scales. 
?. Head deep brown, with narrow-curved dull brown scales 
and pale grey ones round the eyes in front and with numerous 
