INSECUTOR INSCITI^ MENSTRUUS 39 



bristles. Postnotum nude, brown. Pleurae blackish brown, 

 with a transverse stripe and the lower portion whitish pruinose ; 

 coxse pale. 



Abdomen depressed, dull black, without scales, clothed with 

 rather coarse black hairs, posteriorly denser at the sides and 

 with pale luster. 



Wings hyaline, the veins marked black and white, the out- 

 standing scales very narrow ; four large white costal spots in- 

 volving costa and first vein, the second spot at about middle 

 of wing, the fourth a short distance before apex ; a large white 

 spot on the fringe at wing-apex at ends of second and third 

 veins ; a white spot on the fringe at apex of lower branch of 

 fourth vein, another at apex of upper branch of fifth ; a min- 

 ute white spot at base of third vein, another at furcation of 

 fifth; basal portion of first vein with a long interrupted white 

 streak, separated from first costal spot by a small black spot. 

 Halteres with white stems and black knobs. 



Legs long and slender, black marked with white. Femora 

 streaked with white, the hind pair with a black ring close to 

 base ; tibiae white beneath to near apices, the extreme apices 

 white; front tarsi with the first three joints dorsally streaked 

 with white, the first with black ring near base, the second and 

 third with black basal rings, the last two joints wholly dark; 

 mid tarsi with the four proximal joints dorsally streaked with 

 white to near base, the first with black ring toward base, the 

 fifth wholly dark; hind tarsi with the first joint ventrally 

 streaked with white, a black ring near base and a broad white 

 one at apex, the four distal joints white and with basal black 

 rings. 



Length : Body about 3 mm., wing 3 mm. 



Manoa, Orinoco River, Venezuela, January 10, 1910, one 

 female (F. L. de Verteuil) ; Guayaquil, Ecuador, one female 

 (F. Campos Ribadeneira) ; Gatun, Canal Zone, Panama, Feb- 

 ruary, 1917, one female (L. H. Dunn). 



Type, Cat. No. 31065, U. S. Nat. Mus. 



Resembles Anopheles boliviensis most closely, but is readily 

 distinguishable by the black-scaled third vein. In some speci- 

 mens of boliviensis the third vein is dusky, but in such cases 



