Group I. 



viz. : A. barbirostris, which has entirely black palpi and very broad 

 spindle-shaped scales, and A. nigerrimus, which has four bands on the 

 palpi and less broadly spindle shaped scales. These two represent 

 the common types of these mosquitoes in India. The larvae of thk 

 group are very characteristic and can readily be distinguished from 

 all other "anopheles" larvae. The external frontal hairs have a brush- 

 like appearance forming the so-called " cockades." The antennae 

 have a large branching hair on their inner sides. The pupa is also 

 characteristic (as was first pointed out by Cogill) and can readily 

 be distinguished by the shape of the breathing horns. The tube, 

 before expansion, arches up over the dorsum of the thorax almost 

 meeting that of the opposite side in the middle line, and is then 

 bent on itself at right angles to the dorso-ventral plane of the pupa, 

 thereby becoming inverted U shaped. The tube at its outer ex- 

 tremity expands into a cavity, somewhat resembling the shape of 

 an open mussel shell. The enveloping membrane of the eggs 

 of the mosquitoes of this group consists of a layer of cells of 

 extremely regular hexagonal outline more regular than in the eggs 

 of any other " anopheles." 



Breeding places. The larvae are generally found separately 

 or scantily in pools overgrown with weed, hence tanks are common 

 breeding grounds. 



Observation. This group is practically Theobald's genus 

 Myzorrhynchus. 



We have retained the name nigerrimus, although the description 

 given under that name of the type specimen in the British Museum 

 in Theobald's " Culicidae of the World," Vol. I, page 145, does not 

 quite correspond with the specimens we have found in India ; 

 indeed we have never noted a specimen with black tips to the palpi. 

 Our type most nearly corresponds with Theobald's description of 

 Myzorrhynchus minutus, but our drawing was made from a very large 

 specimen, one of the largest " anopheles" we have seen ; the name 

 minutus would therefore be misleading. 



The following recorded species in other countries than India 

 belong to this group : umbrosus (Theobald), albotaeniatus (Theo- 

 bald), sinensis (Wiedmann), malayensis (Theobald), pseudopictus 

 (Grassi), mauritianu* (Grandprej, paludis (Theobald), tenebrosus 

 (Donitz), bancroftii (Giles). 



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