76 



A. INGRAM AND J. W. SCOTT MACFIE. 



Anopheles pharoensis, Theo. (fig. 1). 



The paddles are pyriform, with a slight external fringe, and have well developed 

 midribs ; they have also an external buttress, which is less developed than in 

 A. costalis. There are two terminal setae on each paddle, a large and a small one, 

 as in the other species of this genus. The large hair is not bifid, though the small 

 one, which is poorly developed, may be split at its end. These hairs lie further 

 apart than do the similar hairs in A. mauritianus, and the larger hair is longer 

 than the larger hair on the paddle of A. mauritianus (9 units to 7). 



There is a stout irregularly branching dendritic seta, much like that of A. costalis, 

 at the posterior angle of the 8th abdominal segment ; it is about one-fifth the 

 length of the paddle. At the posterior angles of the 5th, 6th, and 7th segments 

 are stout, curved and sharply pointed setae, longer than the similar setae on the 

 segments of A. mauritianus. At the posterior angles of the 3rd and 4th segments 

 are curiously stunted and blunted setae. Internal to the seta at the posterior 



Fig. 1. AncpJieles pharoensis, Theo.* 



angle and at the posterior border of the segments on the dorsum is a tuft of hairs- 

 upon the 3rd to the 6th segments ; these hair- tufts have fewer hairs than the similar 

 tufts on A. mauritianus ; on the 7th segment this hair- tuft is replaced by a single 

 or bifid hair. Nearer the middle line of the dorsum on either side upon the posterior 

 margins of the 5th, 6th, and 7th segments is a single stout hair extending to the distal 

 margin of the segment over which it projects ; this hair is replaced by a tuft on the 

 posterior border of the 3rd and 4th segments. The trumpets have wide apertures, 

 which are not fluted. 



Anopheles mauritianus, Op. (fig. 2). 



The paddles are large and pear-shaped, with a slight fringe on their outer 

 margins ; they have well-developed midribs and also buttresses, which are slighter 

 than those of A. costalis. The terminal hairs on each paddle are a large hair, which 

 is usually bifid, and a small one, which may have its end split into three or four 

 pieces. The hairs are slightly curved, but not hooked. 



At the posterior angle of the 8th abdominal segment is a stout seta giving off 

 delicate branches only upon its inner aspect ; these branches all extend to about 



* Unless otherwise stated the magnification oi all the drawings is X 50. 



