Ixvi 



every single one of the above characters exactly. Therefore 

 it is a true Pierid. Its peculiarities are all of less than family 

 value, and suggest at the most that it might form a separate 

 subfamily Pseudopontiinae [as adopted by Prof. Aurivillius 

 in Seitz]. It is remarkable for the following characters : — 



(a) The strong curving of R^ (9 in F.W., 7 in H.W.) in 

 both wings, and, in the hind-wing, the failure of Rj^ (7) to 

 continue coalesced with Sc (8) distally. A parallel to this 

 can be found in some male Psychidae. Normally, Sc (8) 

 and Ri (7) are fused distally in all Heteroneurous hind- wings. 

 Sej)aration is not an ancestral character here, but is due to 

 enlargement of the area of the wing served by these two 

 veins. 



(6) The smallness and narrowness of the cell in both 

 wings. 



(c) The comjjletion of the precostal spur in hind-wing to 

 the wing-margin (most Pieridae have it stopping short of 

 the margin). 



(d) The extraordinary manner of forking of the branches 

 of Rs (7-9) in fore-wing, together with loss of two branches. 

 {Delias and other genera have lost two branches, but the 

 manner of branching is altogether peculiar). 



(e) Most of the wing-scales are very highly specialised, of 

 a deeply bifid type, with normal scales interspersed. 



I think the characters {a)-{d) indicate descent from a 

 smaller-winged form with normal-sized cell for such form, 

 with sudden evolution of a larger and more rounded wing 

 by expansion of the area beyond the cell. I anticijiate that 

 the larva and jxipa will show normal Pierid characters. 



5. On the Male Armature and the Egg of Psevdopontia 

 paradoxa, by Dr. Harry Eltringham. 



The armature of P. paradoxa is of a peculiar structure 

 unlike that of any other species known to me. Plate B, fig. 1, 

 shows the apparatus in situ, whilst figs. 2, 3, and 4 show 

 dift'erent aspects of the organs dissected out from another 

 specimen. 



The uncus is short, broad and slightly bifid. The claspers 

 are of characteristic shajae, and just below the j^oint where 

 the oedeagus is extruded they are heavily chitinised and 



