178 
A Monograph of Culicidae. 
colour. Tlie specimens collected by Dr. Holmberg in Formosa 
are darker and smaller than his, and the rings on the tarsi are of 
a purer white. It inhabits the delta and banks of the Parana, 
and is present in great numbers in March and April, and visits 
the houses more than any other mosquito there; the bites of 
this mosquito are more painful than any other of the Culicidae 
I know. It is the ‘ black mosquito ’ which Holmberg refers to 
in his ‘ Voyage to the Mission.’ Fortunately this insect does not 
live in the plains of the interior of Buenos Ayres districts, 
neither does it stray far from the banks of the Parana. It 
appears this insect does not like thickly populated places ; at 
least it is rare in the city of Buenos Ayres and its suburbs.” 
Synonymy .—The species which Arribalzaga describes as 
Taeniorhynchus taeniorhyncJms of Wiedemann is Walker’s Culex 
titillans, described in the British Museum List, p. 5, 1848. The 
type of C. titillans is in the British Museum, and it is clearly the 
same as Arribalzaga’s T. taeniorhynchus. In the same collection, 
arranged by Walker, was placed a specimen under the name 
perturbans , which is quite different; it is a Taeniorhynchus. 
Coquillett expressly states that his taeniorhynchus is not Arri¬ 
balzaga’s, but is also in error, for his specimens are Walker’s 
C. sollicitans, judging from Professor Howard’s excellent figure. 
As far as one can tell from the short description, Wiedemann’s 
C. taeniorhynchus is the one that occurs in South America and 
the southern half of North America, and is smaller and much 
darker as well as being more distinctly banded than P. titillans , 
whilst the scale structure is quite distinct. Walker’s name 
titillans must therefore stand for this species. 
2. Panoplites pseudotitillans. n. sp. 
Thorax reddish-brown, with two parallel median paler lines, 
darker brown between, with some pale golden scales in the 
middle and some pale scales around the front of the mesothorax. 
Abdomen fuscous, with yellow-scaled apical bands. Legs 
ochraceous, covered with brown and scattered ochraceous and 
white scales; tarsi and metatarsi with basal white bands on 
some or all of the joints; ungues equal and simple in the 9 • 
Wings densely scaled with broad flat squamae only, no long 
clavate scales, as in the former species, and generally more 
tawny in colour. 
