482 Mr. G. J. Arrow an 



rupted. The pygidium, which in the latter sex is quite 

 bare, is thickly clothed with yellow hairs and, as is also 

 frequently the case in F. canaliculata, the prothorax is 

 normally quite black in the female and in the male a more 

 or less deep shade of red. But the most interesting 

 difference, although not an invaiiable one, is that each 

 elytron of the female usually exhibits one or more deep 

 furrows or scratches bordering the scutellum, less con- 

 spicuous but of precisely the same nature as those of P. 

 canaliculata. There are sometimes as many as four or 

 five of these on each side and occasionally they are quite 

 absent. 



F. sumhawanct, Ohaus, is another related insect of which 

 the sexes are very distinct. By the kindness of the 

 describer I have been able to examine the type, which, 

 like several similar specimens I have seen, is of the male 

 sex ; but in M. Rene Oberthur's collection, in addition to 

 two specimens of this form, there are four females found 

 with them at Sumbawa which, instead of having the 

 reddish tawny coloration of the male, are black or very 

 dark brown with orange markings on the elytra, consisting 

 of an irregular fascia below the scutellum and an apical 

 spot, very similar to the markings of F. canaliculata. 

 The present insect however is smaller than that species, 

 more convex, and less shining, with distinct striation of 

 the elytra and the thorax punctured all over. In these 

 respects it corresponds with the male, in some specimens 

 of which similar paler markings can be faintly traced. 



The following new species of this group are also 

 dimorphic. The first, F. cingala, is closely related to F. 

 hasalis, the sexes differing in the pygidium being similarly 

 clothed with hair in the female. 



Farastasia cingala, sp. ri. 



Valde convexa, nigra, nitida, prothorace fasciaque serrata sub- 

 humerali coralinis ; capite rugoso-pnnctato ; prothorace puuctato, 

 utrinque foveolato ; scutello fere Isevi ; elytris leviter siilcatis atqiie 

 puiictatis ; pygidio subtiliter striolato nudo ; 5 prothorace crasso, 

 grosse j)unctato, fascia ely trail latiora sed neque ad margines attin- 

 geute, elytris sat evideater sulcatis et punctatis, pygidio hirto. Long. 

 13—15 ni.m. 



Hah. Ceylon : Colombo. 



This insect, at least in the male sex, closely resembles 



