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A Monograph of Culicidae. 
always observed suspended from the surface by its thoracic air-tubes and 
caudal fins, the abdomen being directed upwards, and thus bringing the 
two pairs of organs close together.” 
Note. —Judging from the figures of larva and pupa (pi. IV. 
3 a and 3 b), I should not say it was a true Corethra ; in any case 
it differs materially from our European types. The figure (3) 
of the adult, however, shows typical Corethra thoracic ornamenta¬ 
tion, and the wings have three dusky patches on the border. 
Corethra Braziliensis. n. sp. 
Legs banded black and white. Wings with some brown 
spots. 
9 . Thorax and abdomen greyish-brown; hairy. 
Wings with the fringe abnormally long; first sub-marginal 
cell considerably longer but about the same width as the second 
posterior, their bases about level; stem of the former one-third 
the length of the cell, of the latter nearly half the length of the 
cell; posterior cross-vein about half its length distant from the 
mid cross-vein ; at the base of the fork-cells runs a broad dusky - 
brown patch, which sends out a branch on each side, forming a 
broad dusky patch on each side of the posterior cross-vein which 
bend down to the border of the wing. 
Legs with the femora and tibiae banded with brown and 
white, and with the metatarsi and tarsi with basal white bands ; 
in the hind legs the femora have seven small black bands, and 
the apex broadly deep brown, the tibia also with seven dark 
bands, including the apical one, the metatarsus banded white in 
the middle, not at the base; in the fore legs there are only six 
black bands to the tibiae and the metatarsi are basally white ; 
legs densely hairy; ungues small, equal and simple. 
Length. —2 mm. 
Habitat. —Brazil (Dr. Lutz). 
Observations. —Described from a single specimen damaged in 
transit, but very distinct and easily identified from the wings 
being spotted and the markedly banded legs as in our European 
species. 
It is the only specimen of Corethra yet taken in South 
America. 
I cannot make it either Say’s C. punctipennis nor Loew’s C. 
trivittata. No mention is made of the number of bands on the 
