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THE ANOPHELES OF MALAYA.— PART I. 



By A. T. Stanton. 

 (Institute for Medical Research, Kuala Lumpur, Federated Malay States.) 



In this series of papers it is proposed to give the results of a detailed study of 

 the individual speeies of the Anopheles mosquitos of the Federated Malay States. 

 The ova, larva and pupa stages of certain species will be described for the first 

 time. Specimens bred from the ova laid by females in captivity will form the 

 basis of this study and by this means it is hoped to avoid those inaccuracies 

 which are liable to result from the absence of such experimental observations. 



In a previous paper published in this journal (vol. iii., p. 387) attention was 

 directed to the growth-changes which occur in those characters of Anopheles 

 larvae which are believed to be of importance in their specific differentation. In 

 view of the findings there recorded, I shall include under each species a 

 description of the immature stages of the larva, as well as of its mature form. 



Some authors lay stress on the specific value of the form of the leaflets in the 

 palmate hairs, whence it might be inferred that the leaflets in all the palmate 

 hairs of a given larva are of similar form. This however is not the case and 

 when reference is made to the form of such leaflets the segment which bears them 

 should be indicated. When palmate hairs are borne on the thorax they are 

 usually different in shape from those borne on the abdominal segments. 



The synonymy suggested for the different species is based on the study of a 

 series of specimens, derived in most cases from a single female of the species and 

 on careful comparison of these specimens with published descriptions. It has 

 not been possible to examine all the original types, some of which are now non- 

 existent and others inaccessible to the writer ; it is possible therefore that this 

 synonymy may require revision at the hands of those who have opportunity for 

 this investigation and who are also familiar with the common variations in the 

 species itself. 



There is no doubt that in this group of insects the number of species names 

 has been unnecessarily increased by authors attaching exaggerated importance to 

 characters which on further study have proved to be variable, and that the 

 natural affinities of species have been obscured by the division of the group into 

 a multiplicity of genera. 



Anopheles tessellatus, Theo. 



Anopheles tessellatum, Theobald, Mon. Culic. i, p. 175 (1901). 



Anopheles punctulatus, Theobald (nee Donitz), Mon. Culic. i, p. 17.5 (1901). 



Myzomyia tessellatum, Theobald, Mon. Culic. iii, p. 55 (1903). 



Anopheles deceptor, Donitz, Zeit. fur Hygiene, xli, p. 60 (1903); Theobald, 



Mon. Culic. iii, p. 105 (1903). 

 Myzomyia tessellata, Theobald, Mon. Culic. iv, p. 42 (1907). 

 Myzomyia piuictulata, Leicester (nee Donitz), Stud. Inst. Med. Res., F.M.S., 



iii., pt. 3, p. 27 (1908). 



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