334 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XV, 



difference between them will become evident when the larval descrip- 

 tions are compared, and it is probable that, when all species of 

 Anopheles are properly classified, the two will not be even in the same 

 genus. 



The larva of this species differs much from those of any of the other 

 species examined. It shows variation in structure in 

 two appendages which are constant in all other forms. 

 The first of these appendages is a bristle situated near the margin of 

 the buccal cavity almost in the same plane as the antennae, but just 

 inferior to it : this bristle has, for convenience of description, been 

 named the " buccal bristle." The second appendage is the " balancer " 

 situated on the 3rd abdominal segment. 



Frontal bristles, median : long, very close together, and unbranched 

 as far as can be made out ; angular, short, simple. 



Buccal bristle : is almost devoid of branches up to the extremity, 

 where it is expanded into a marked enlargement which is almost flat 

 antero-internally and convex postero-externally, having a corona of 

 hairs round the flat margin. At the origin of the bristle on the thorax 

 there is a plain stiff hair (vide figs. 4a and 4b). 



Palmate hairs : situated on the 2nd to the 7th segments. 



3rd abdominal balancer : is single as in other species, but instead of 

 being branched throughout its length, is quite plain. 

 Palpi : black, rather slender. 



mago. Proboscis : black, slightly longer than palpi. 



Antennce : plain black. 



Head : black, with a small crest of white scales. 



Thorax : dull chocolate-brown with dorsal and sub-dorsal lines of a 

 darker colour. 



Halteres : fuscous. 



Wings : black scales throughout ; the 2nd transverse vein opposite 

 the 3rd, the 4th internal. 



Legs : the claws of the male fore-legs differ from all the other species 

 in that they have not the short thumb-like second claw characteristic 

 of the remaining species. 



Abdomen : dark chocolate coloured, plain. 



Length : 4 ram. without the proboscis which is 2 mm. 



was first found by Mr. E. H. Aitken in April ; it 



^4« -ICciVWCLVi 



Theobald Was ver ^' common i n M a y and continued abundant 



throughout the rains to the end of the year. Unfor- 



