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MEDICAL ENTOMOLOGY 



THE ANOPHELINA 



Mosquitoes for the most part with spotted wings, and assuming a 

 characteristic tilted attitude when at rest, the proboscis and palpi being 

 in the same plane as the thorax and abdomen. Palpi in both sexes, 

 almost without exception, equal in length to the proboscis, and frequently 

 spatulate at the tip in the male. Head covered with an abundance of 

 upright forked scales, but never with flat scales ; thorax and abdomen 

 clothed with many hairs, occasionally with scales, and then usually on 

 the last abdominal segments only ; scutellum simple, never trilobed ; 

 metanotum bare or with a few hairs. 



This group of mosquitoes contains the important species which are 

 concerned in the transmission .of the parasites of malaria, and it is 

 therefore important for the worker to be able to identify them. 



Theobald divides his subfamily Anophelinae into twenty-one genera. 

 Alcock, however, considers that many of these cannot be separated 

 as distinct genera, and he proposes grouping all under the single 

 genus Anopheles, dividing it into seven subgenera as follows : 



Alcock's Synopsis of the subgenera of Anopheles. 



A. The covering of the [scutum consists mainly either of hairs 



or of narrow falculate scales. (In any doubtful case the 



palpi are slender, i. e. not shaggy with outstanding scales) ... 1 



B. The covering of the scutum consists mainly of broadish 



elliptical, commonly recumbent scales .... ... 2 



1. Abdomen either without scales or with some inconspicuous 

 narrow scales on the genital lobes and terminal segment, 

 or with a tuft of scales on the ventral surface of the 

 penultimate segment ....... ... 3 



Abdomen with an outstanding tuft of stift and slender scales 



of extraordinary length on either side of every segment. Christya. 

 Abdomen with broad and very conspicuous scales on 

 several segments, some of the scales sometimes forming 

 regular and outstanding tufts , . , . Arribalzagla. 



3, Wings either not spotted at all or having a few dark spots 

 formed merely by clumps of scales, or if ' variegated,' 

 then there are not more than two distinctly formed colour- 

 spots on the anterior edge. (In ambiguous cases, e.g. 

 where a spot at the tip of the wing might be reckoned as 

 anterior, then the palpi are shaggy) .... : . . 4 



Wings usually much spotted in contrasted colours, their 

 anterior edge barred or branded with numerous alternate 

 dark and lights pots or streaks. (In any ambiguous case 

 the palpi are not shaggy). Inconspicuous scales occa- 

 sionally present on the terminal abdominal segment and 

 genital lobes . "". " "" . . . *"",""*". Myzomyia. 



