64 A Monograph of Culicidae. 
with a few black bristles (fig. 38, IT) ; scutellum black, with deep 
brown border-bristles ; metanotum black ; pleurae brown. 
Abdomen black with deep brown tessellated marks in certain 
lights, covered with rows of small, dull, pale hairs and longer 
brown lateral ones. Legs deep brown, rather paler at the base, 
long and thin: ungues rather thick, small, equal and simple. 
Wings unspotted, with the veins covered with deep brown 
scales; the first sub-marginal cell longer and little narrower 
than the second posterior cell, its base much nearer the base 
of the wing than that of the second posterior,’its stem about 
one-fourth the length of the ceil; stem of the second posterior 
as long as the cell; supernumerary and posterior cross-veins in 
one Hne, mid cross-vein slightly in front of both; the sub-costal 
joins the costal nearer the apex of the wing than any of the 
cross-velns. 
Halteres with pallid stem and fuscous knob. 
Length.—4°5 mm. 
¢. Palpi black, unbanded, the two apical joints swollen, 
the apical very short, the second or penultimate much con- 
stricted at the base, both minutely hairy and densely scaled. 
Antennae with deep brown plume-hairs; proboscis black. 
Thorax ornamented as in the female. Legs long and thin; fore 
ungues unequal, the larger uniserrated ; mid and hind equal 
and simple. Genitalia with long claspers. 
Length.—4°5 mm. 
Habitat.—British Guiana (Dr. Low) 9 and ¢, and Para 
(Dr. Durham), ¢. 
Observations.—Described from specimens sent by Dr. Low 
per Dr. Manson. It is a very distinct species, but in one the 
peculiar thoracic ornamentation is not shown, the mesonotum 
being apparently damaged. The long thin legs are very charac- 
teristic. It bears a resemblance to our A. nigripes, but the 
thoracic ornamentation differs. Dr. Low considers this very 
distinct Anophelete to be the intermediate host of the malarial 
parasites in British Guiana. He writes as follows to Dr. 
Manson: “ Malarial fever is got amongst the Indians and 
often of a severe type. In that connection it is interesting 
that in the interior at a place called Corato I got an entirely 
new Anopheles in large numbers.” 
Dr. Low writes that he got samples of this new genus 
at Cabacaburi, Pomeroon River. It was very common, forming 
the greatest number of mosquitoes caught at night and brought 
