CTJLEX AZYMUS 451 



each bearing a long feathered hair; dentition of one long tooth on a process 'ith 

 a row of short spinose ones below ; a spine before, a long smooth filament and 

 four feathered hairs within ; process below curved basally, obscurely furcate, with 

 a row of hairs outwardly and a tuft at tip of each limb ; basal angle absent, a row 

 of hairs within ; a row of hairs at base. Maxilla elongate, bluntly rounded at 

 tip, divided by a suture; inner half with long spines at center of margin and 

 shorter ones at base, a row of stout cilia within ; a row of long hairs at tip run- 

 ning down along suture; outer half with two small filaments below middle. 

 Palpus small, with four long, slender apical digits. Thorax rounded, wider 

 than long; abdomen moderate, anterior segments shorter; lateral abdominal 

 hairs in threes on first segment, in twos on second, in threes and short on third 

 to fifth, in twos and long on sixth ; skin smooth. Air-tube very long and slender, 

 slightly widened at base, with a few pecten teeth scattered on basal seventh, of 

 long simple spines; a single slight hair about middle of tube; length about 

 fourteen times basal width, about thirty times apical width. Lateral comb of 

 eighth segment of many spines in a triangular patch; single spine elongate, 

 widened at tip, with an apical fringe of spinules. Anal segment twice as long 

 as wide, ringed by the plate ; dorsal tuft of two long hairs on each side ; ventral 

 brush moderate, confined to the barred area. (Anal gills missing.) 



The larvffi live in the water between the leaves of Bromeliaceae. 



Island of Trinidad, West Indies ; probably also in Brazil. 



Trinidad (F. W. Urich). 



Culex inimitahilis is a very characteristic member of the group of species 

 breeding in Bromeliaceffi. The male palpi are longer than the proboscis, but, as 

 in other species of the group, blunt at the tips ; in spite of the long male palpi, 

 the relationship with such forms as C. conservator and C. corrigani is close and 

 obvious. 



CULEX AZYMUS Dyar & Knab. 



Culex azymus Dyar & Knab, Proc. Biol. Soc. Wash., xix, 169, 1906. 

 Culex azymus Theobald, Mon. Culic, v, 615, 1910. 



Obiginai. Description of Culex azymus : 



$. Palpi, proboscis and antennse black; head white behind, with a patch of black, 

 forked scales in the middle, black on the sides below, setae black. Thorax black, 

 golden-brown scaled, uniform, without spots, setae black; pleurae whitish, with a 

 black band above bases of legs and another below wings. Abdomen black, with nar- 

 row whitish basal segmental bands, widening laterally, venter grayish white. Legs 

 black, the femora pale below, tibiae and the first two tarsal joints appearing whitish 

 on lower side in certain lights, unhanded. 



Allied to Culex pleuristriatus Theobald, but lacking the thoracic spotting and any 

 trace of the white tarsal bands. 



The larva is allied to pleuristriatus (Journ. N. Y. Ent. Soc, xiv, 205, 209, 1906), 

 but the pecten of the air tube has two detached teeth, which exceed the two basal 

 hair tufts. 



One specimen, bred from larvse in Bromelia water at Arima, Trinidad by Mr. F. 

 W. Urich. 



Type. Cat. No. 10,020, U. S. Nat. Mus. 



Desceiption of Female and Larva of Culex azymus (Male Unknown) : 



Female. Proboscis moderate, rather slender, swollen at tip, labellae conically 

 tapered ; vestiture black with a blue reflection ; seta? minute, curved, black, those 

 on labellae more prominently outstanding. Palpi slender, nearly one-fourth as 

 long as proboscis, black, with a few outstanding setae at base. Antennae 

 moderate ; joints subequal, rugose, pilose, blackish, second joint a little longer 

 than third; tori subspherical, with a cup-shaped apical excavation, luteous, 

 shading to brown within; hairs of whorls sparse, moderate, black. Clypeus 

 broadly rounded, convex, brown, nude. Eyes black. Occiput blackish, clothed 

 broadly with narrow, curved bronzy-brown scales, dull silvery ones below and 



