( 208 ) 



ett/fenia (Cram.), but vein 11 of the foiewiiig origiiiatps closer to the aroole, vein :i 

 to the fore- and hindwing stands closer to vein 4, and tlie cell of the hindwing is 

 shorter. In Asola contoHa (Auriv.), not in A. tortitofid (Moore), the cell to the 

 liindwing is just half the length of the wing, while in the other species of Asotn 

 the cell is shorter. The ajiical portion of the areole, Iwyond origin of \i'in (!, is 

 generally' longer than the basal portion. 



The structure of the stridulating organ is jieculiar. The cavity on the forewing 

 is well limited only in front, not at the basal side, as in Peridronie Wlk. and 

 Enplocla lib. : the fold in front of the cavity (PI. IV. fig. 36) is rather broad, and 

 is covered with irregularly ananged scales which are rounded at the apex ; in the middle 

 portion of the fold the number of such .scales standing beside one another and partly 

 covering each other is, across the fold, about eight or ten. There is in the middle of 

 the fohl one large obliquely placed scale of a yellowish colour, which is thicker and 

 more chitinous than normal scales are, and has one or more sharp longitudinal ridges. 

 The scales immediately beside this one are also enlarged and yellowish, and are 

 attached to one another and to that large scale to form a rather strong organ for 

 friction against a patch of thick scales on the uppersidc of the hindwing. This 

 patch (PI. I\'. fig. 41) stands along the anterior side of the costal nervnre, is longer than 

 broad, of a yellowish colour in all species, and consists of large, slightly pentagonal, 

 scales with a basal sinus and thirty-fi\e surface ridges (PI. W . figs. 42 and 44) [AsoUi. 

 heliconiii (L.)]. The stridulating organ does not vary much in Asotn, neither 

 according to individuals nor to diflierent species, and is readily distinguished from 

 that of all other Aganaids. 



The homologous orgau of Ayanais jicus (F.) (PI. JV. fig. 37) comes very near 

 that of Asota; there are, however, three or foui' large scales on the fold before the 

 cavity of the forewings. 



In iJiijitiiKt^loore the fold is very narrow, and is covered by twenty-two to twenty- 

 four transverse, somewhat asymmetrical, thick scales which stand in a single longi- 

 tudinal row and are strongly ribbed longitudinally (PI. IV. fig. 40). The corresponding 

 mark upon the uppei'side of the hindwing is a regularly arched row (PI. IV. fig. 43) 

 of about fifteen thick scales which stands between costal margin and costal nervnre. 



All Asotd species have on the underside of the forewing the basal half of the 

 cell between median and submedian nervure covered with hairs, and there is a stripe 

 of hairs just behind the submedian vein which extends from the stridulating organ 

 down to the base of the wing, and is, like a similar strijie on the upperside of 

 the hindwings before the costal nervure, most probably a scent-iiroducing organ. 



K. .T. 



{To he continued.) 



