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PACIFIC SCIENCE, Vol. XII, July, 1958 
Fig. 1. Male phallosome. a, Culsx iyengari n. sp.; b, Culex pacificus; c, Culex pervigilans; d, Culex pipiens. 
The Devonshire form is unique in possess- 
ing postspiracular scales. C. trifilatus has ap- 
peared previously as an aberrant member of 
the group in that its larva exhibits supernum- 
erary spines on the siphon distal to the pecten 
(Hopkins, 1952: 309). Recently, however, a 
form has been found at Orange Kloof in 
western Cape Province in which these spines 
are absent (Muspratt, 1955: 188). On grounds 
both of morphology and of distribution it 
seems likely that this is the most primitive of 
the Ethiopian forms. An even more southerly 
Culex than C. pervigilans has recently been re- 
corded from Auckland Island (Harrison, 
1955: 211). It is, however, undescribed and it 
is not known whether it belongs to the 
present group. 
A comparable distribution to that of the 
C. trifilatus group has been described by Mat- 
tingly and Marks (1955) for some members of 
the subgenus Neoculex . Certain of the Medi- 
terranean elements in this subgenus are again 
