LIST OF THE AKOPHELINES OF THE MALAY ARCHIPELAGO. 



85 



4. Myzomyia minima var. aconita (fig. 8). 



Addition to Stanton's description : In running water a larval type was common 

 with completely nude median and simple long posterior clypeal hairs. The adult 

 emerging from this larval variety showed the usual characteristics of aconita. 

 The breeding places of the two larval types differ somewhat : out of 644 typical 

 larvae 42 per cent, were found in rice fields, 11 per cent, in running water, 31 per 

 cent, in fish-ponds, 15 per cent, in marshes and 1 per cent, in dirty stagnant water ; 

 the percentages of 562 specimens of the larval variety found in the same breeding- 

 places were 1 '7, 88, 10, 0'3 per cent, and nil. Consequently the latter is more adapted 

 to life in running water. 



Fig. 8. Myzomyia minima var. aconita, larval 



variety : a, clypeiis ; h, leaflet of fan on abdominal 



segment v. 



It is to be noted that the larva of the typical M. minima (fig. 9) is almost identical 

 with the larval variety of aconita, the only difference we could detect existing in the 

 length of the filaments of the leaflets which is J-| of that of the whole leaflet (in the 

 larval variety of aconita this relation is usually x^-f). 



5. Differences between the Larvae of Nyssorhynchus punctulata var. tesselata and 

 Cellia kochi. 



Stanton enumerates them as foUows : In N. punctulata there are no fans on 

 abdominal segments i and ii, whereas in C. kochi they are present on the latter. 

 We noted in both species on segments i and ii small fans with very narrow or 

 hair-like leaflets ; in C. kochi on segment i sometimes a cockade only. Consequently 

 in the Malay Archipelago the fans cannot be used to distinguish these larvae. We 

 use the following characters : In N. punctulata : (a) Antennae usually much pig- 

 mented ; (6) occipital hairs short with 3 or more branches ; (c) internal shoulder 

 hairs short, usually with no more than 3 apical branches. 



In C. kochi : {a) Antennae fight ; (6) occipital hairs longer, unbranched or bifur- 

 cated ; (c) internal shoulder hairs long, with numerous long branches inserted at 

 intervals along the stem. 



