174 



Records of the Indian Museum. 



[Vol,. XVI, 



(omitting /. forcipafa, Morton, of which the female remains un- 

 known) have females in which the colouring of the head and 

 thorax resembles that of the males, to some extent at least; 

 whilst the abdomen has its segments all marked with a longitu- 

 dinal, dark, metalhc band of considerable breadth on the dorsum ; 

 the ground colour being greenish-yellow or sometimes orange. It 

 should be noted that in some species the antehumeral bands of the 

 thorax are not enclosed on their outer side by black markings, 

 but are only defined by a deepening of the ground-colour of the 

 sides of the thorax. In the accompanying table these species 

 are noted as having the antehumeral bands 'not enclosed.' 

 Females belonging to this first type of colouring are called ' normal ' 

 in the table. It is worth remark that the abdominal pattern found 

 in this type seems to be primitive ; it is repeated in the case 

 of the females of many other genera 



Secondly certain species have a female form in which not only 

 the head and thorax are coloured as in the male, but in which the 

 abdominal markings are identical with those of the male. The 

 females are noted in the table as ' andromorphs.^ 



Lastly one species (/. inarmata. Calvert) has in addition to the 

 ' normal ' female another form in which the thorax is uniformly 

 bright orange and without colour pattern. This form I call a 

 ' heteromorph.^ * 



Forms enclosed within square brackets are the rarer of the two. 

 For notes on Indian species see also Laidlaw, Rec. Ind. Mus., XII, 

 pp. 129-132 (1914). 



' A very similar heteromorph occurs in the case of the Australian species 

 /. pridiwsa. 



