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Genus Psorophora. 
California (Coquillett); Florida; New Orleans (Veazle). Dr. Lutz 
writes that it is more common in Rio, but is also found in Sao 
Paulo and Santos. 
Time of capture. — October in Shreveport (Mally). 
Observations. —The type of this species is in the Jardin des 
Plantes and is much worn. Walker’s Culex perterrens and C. con- 
terrens are this species, but I am not certain of Wiedemann’s 
C. molestus , that authority having apparently described two 
C. molestus. 
It is a very distinct insect, which cannot well be confused 
with any other of the Culicidae, and may be taken as the type of 
the genus Psorophora of Desvoidy, which I propose to retain. 
The densely scaled legs and its general tawny colour should at 
once enable the collector to identify it. It nevertheless presents 
a close superficial resemblance to some Mucidus, but can at once 
be told from that genus by the narrow wing scales and unmottled 
wings, as well as the different venation. 
There is a specimen in the Museum labelled by Walker 
Culex centaurus. This is probably only a MS. name of Walker’s. 
Robineau Desvoidy described another Psorophora , P. Boscii 
from Carolina. I believe that this is only a small pale P. ciliata 
which occurs in that State. Desvoidy said it resembled ciliata , 
and that it is troublesome and common, and spoken of as 
“ mosquito ” by the natives. Arribalzaga writes concerning this 
species in the Argentine as follows : “Is variable in size and 
colour. It often happens that the tarsal joints are scarcely 
visible, whilst in other cases they are very apparent. I have 
noticed that they never have the ferruginous dorsal band on the 
abdomen which Macquart refers to (Hist. Dipt.). This species is 
not uncommon in the lower delta of the Parana, and the habits 
are seemingly wild in the perfect stage. But where P. ciliata is 
most common and causes much annoyance is in the great woods 
of El Chaco. The great number of specimens brought from that 
district by Dr. Holmberg and the stories told by people who 
have travelled there prove it to be very abundant. I have never 
seen it, nor believe that it occurs in marshes and swamps which 
are unwooded ” (Dipt. Arg. p. 41). 
Description from Mem. d. 1. Soc. d’Hist. Nat. de Paris, iii, 
p. 413, 1827 :— 
“ P. Boscii , R. Desvoidy. 
Like P. ciliata , but smaller, and generally pale yellow. Thorax 
rather dusky, abdomen less so; legs dusky yellow.” 
