AEDES NUBILU8 721 



dorsally at bases of last two joints, no pale ring at middle of long joint. 

 Antennae plumose, the last two joints long and slender, rugose, pilose, black, the 

 others short and slightly thickened at insertions of hair-whorls ; hairs of whorls 

 long, dense, brown with yellowish luster. Coloration similar to the female. 

 Wings not much narrower than in the female, the stems of the fork-cell about 

 the same ; vestiture less abundant. Abdomen elongate, depressed ; basal bands 

 a little broader than iu the female, the series of median spots obsolescent ; lateral 

 ciliation abundant, rather short, brown. Claw formula, 1.1-1.1-0.0. 



Length : Body about 4 mm. ; wing 3 mm. 



Genitalia (plate 33, flg. 215) : Side-pieces over twice as long as wide, tips 

 rounded; apical lobe undeveloped; basal lobe very slight, indicated by a row 

 of setae. Clasp-filament long, slender, uniform, slightly expanded just at base, 

 with a long articulated terminal spine. Harpes broad, with revolute margins 

 and bent pointed tip. Harpagones with columnar, minutely setose base, and 

 long terminal filament, much longer than the basal column, slightly expanded 

 outwardly. Unci forming a basal cylinder. 



Larva, Stage IV (plate 117, fig. 401). — Head rounded, widest through eyes; 

 antennae rather small, slender, weakly spinulated, a double hair at middle; 

 upper pair of dorsal head-hairs in threes, lower pair in twos, ante-antennal tufts 

 of six hairs. Lateral abdominal hairs double on third to sixth segments. Tracheae 

 broad. Lateral comb of eighth segment of many scales in a large patch, each 

 scale evenly spinulated around its apical margin. Air-tube more than three 

 times as long as wide, thickest near base, somewhat tapered ; pecten of fine dense 

 teeth reaching to near middle, followed by a large, multiple hair-tuft. Anal 

 segment longer than wide, with a dorsal plate extending well down the sides, 

 irregular on its lateral margin ; dorsal tufts a long hair and tuft on each side ; 

 lateral hair single, small, at the angle of the plate ; ventral brush well developed, 

 confined to the barred area. Anal gills about as long as the segment, equal, 

 tapered. 



The larvae live in the water in pot-holes and hollows in rocks along the beds 

 of streams. Peryassii states that he took the larvas in brackish water, but does 

 not say whether or not in a rock-hole. Mr. Jennings took the larvae in salt and 

 brackish pools in rocks above high-tide level as well as in fresh water along 

 streams. Mr. Knab found them in fresh water in depressions on bowlders in a 

 stream-bed, associated with Aedes epactius and Culex pinarocampa. 



Forested regions of tropical America, along rivers and sea-coast. 



Cordoba, Mexico, larvse January 4, 1908 (P. Knab) ; Bluefields, Nicaragua 

 (W. F. Thornton) ; Caldera Island, Porto Bello Bay, Panama, January 4, April 

 8, 1908 (A. H. Jennings) ; Chagres River, Panama, May 20, 1907 (A. Busck). 

 Reported also from City of Eio de Janeiro, State of Alag6as, State of Sao 

 Paulo on the margin of the rivers Grande and Mogyassu, City of Bahia, Brazil 

 (Lutz, Peryassu) ; ParA, Brazil (Theobald). 



AEDES NUBILUS (Theobald). 



Theolaldia atripes Neveu-Lemaire (not Culex atripes Skuse), Arch. Parasitol., vl, 



615, 1902. 

 Culex nuhilus Theobald, Men. Cullc, iii, 208, 1903. 

 Culex nubilus Blanchard, Les Moustiques, 629, 1905. 



Ochlerotatus nuUlus Coquillett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 19, 1906. 

 Culex nubilus Theobald, Men. Cullc, v, 361, 1910. 

 Oeiginal Desckiption of Culex nubilus : 



Head, thorax, abdomen and legs deep dusky brown; the abdomen with basal 

 lateral dull creamy spots and dull creamy venter; thorax with small bronzy-brown 

 scales. Legs and proboscis unhanded. 



2. Head dusky brown, with dusky narrow-curved scales behind, deep ochraceous 

 ones In the middle in front and pale ochraceous ones around the eyes, black upright 

 forked scales at the sides and behind, ochraceous ones in the middle in front; pro- 



