1918.] B. Prashad: A Netv Anoijheles, 125 



pair being unbranched and lying close together ; the distance between 

 them being about half that between each external and the corresponding 

 internal hair of the side ; the inner hair is more than one and a half 

 times the length of the outer branched hair. The antennae are long (little 

 less than half the length of the head) cylindrical structures broader at the 

 base, with minute spines on the shaft, with the processes at the apex 

 well developed with a branched terminal hair arising from amidst them. 

 From close to the base of the antenna tliere arises on the outer side a 

 much branched basal hair of the type described for A. culiciformis by 

 Christophers and Khazan Chand (6). Mandibles (fig. 5) with a single 

 pointed and shghtly curved, and three comb-like spines at the apex 

 externally, a well developed anterior and a much smaller internal buccal 

 fan of setae ; four main teeth and seven accessory small ones ; a brush- 

 like large spine external to these and a prominent row of small tooth- 

 like structures on the inner side ; on the main lobe near the outer side 

 a large number of small setae are present on the upper surface, and a 

 number of hairs arising from near the base probably representing the 

 branched basal hair. Maxillae of the ordinary pattern, with large 

 curved hairs on their anterior margins, the inner edge ending on the top 

 in a curved hook-like structure ; on the main plates two minute papillae 

 are present and the upper surface is covered by a large number of hairs. 

 The maxillary palp is a prominent structure with five spines at its upper 

 end, and a large much branched hair external to the processes a little 

 below the tip. The submental plate shows nine well developed teeth. 



Thoracic hairs as in other anopheline larvae. The svbtnediah 

 hairs consist of two branched hairs on each side, an external and an 

 internal one. There are no palmate hairs on the thorax. 



The first and second abdominal segments carry on each side two large 

 and a small feathered hair ; the third segment has one large and a single 

 small feathered hair laterally and two small simple hairs dorso-laterally ; 

 the fourth and the fifth segments have one large and three small feathered 

 hairs on each side besides two simple hairs as in the third segment ; the 

 sixth segment has a single large and two small feathered hairs and two 

 unbranched ones as on the fifth segment ; the seventh and the eighth 

 have only two small feathered hairs on each side. 



Pahnate hairs are present on the abdominal segments 2 — 7 only. 

 Each palmate hair (fig. 6) consists of 15 — 18 leaflets ; the leaflets are long 

 and pointed with one or two serrations on each side. The pecfen (fig. 7) 

 is short and broad with teeth of different lengths irregularly alternate, 

 and with a few hairy projections on the basal parts only. 



The Nymph. 



The nymphal trumpets (fig. 8) are rather elongated structures some- 

 what triangular in shape, and with a broad opening. The dorsal plumose 

 hairs of the ordinary shape are present on the first abdominal segment. 

 There is a lateral spine on segments 2 — 8 ; the one on the last segment 

 being plumose. Besides the spines mentioned above there is a long 

 plumose seta, about the length of the segment bearing it, on the seg- 

 ments 5 — 7 ; the one on the fifth segment is a little smaller than the 

 others. The tail-fins (fig. 9) are much longer than broad ; they have 



