Anopheles nigerrimus. 



The costa is for the most part black, but there are three minute 

 white spots in the outer third of its course ; one of these spots is 

 situated at the junction of the outer and middle third of the costa, 

 another at its distal extremity ; the third and largest white spot 

 lies close to the distal extremity, separated from the distal white 

 spot by a few dark scales. 



The first long vein is covered with light and dark scales, two 

 indistinct large light spots, where the light scales predominate over 

 the black scales, are found, one near the middle of the vein, another 

 in its inner third. There is a distinct light spot opposite the largest 

 white spot on the costa, and the outer extremity of this vein has 

 a few white scales. 



The second longitudinal vein, like the first, is covered with a 

 mixture of dark and light scales, the latter predominate opposite 

 the middle light spot of the first long vein and extend to the 

 bifurcation of the vein. There are light scales forming indistinct 

 spots on each of the branches of the vein. 



The third long vein is for the most part covered with light 

 scales, except at its origin and termination. 



The fourth long vein is covered with light and dark scales 

 almost evenly intermixed throughout the course of the vein, except 

 near its origin and at the termination of its branches, where black 

 scales are most numerous. 



The fifth long vein has black scales at its origin, but white 

 scales predominate throughout the rest of the course of the vein 

 and its branches ; the extreme tips of the anterior and posterior 

 branches of this vein have black scales 



The sixth long vein is mostly light-scaled, but there are two 

 dark-sealed spots on this vein. 



The wing fringe is dark-scaled except at the apex of the wing. 



The legs are of a dark-brown colour, but there are light scales 

 at all the joints. None of the hind tarsal segments are white in 

 their whole length. 



Variations in the details of the markings on the wing field are 

 frequent, but the two light spots on the costa as well as the apical 

 spot are constant. 



The wing fringe is, as a rule, uninterrupted by light scales, 

 but it is not uncommon to find a few opposite some of the long 



80] 



