100 Records of the Indian Museinii. [Vol. XXII, 



In the right forewing the pterostigma can be seen to be about 

 three times as long as broad and covering several cells, 



There are no interpolated veins, except only M^, which can 

 be clearly seen, both in text-fig. 3, and in the photograph of the 

 right forewing. 



Ms is a nearly straight vein lying below, and almost parallel 

 with, M.j. Its anterior portion, forming the so-called "bridge 

 vein ", is clearly marked, though the pigment-band becomes very 

 thin basally, so that it is impossible to determine whether it arises 

 from M,+.2 above, or from M., below. It is quite clear, however, 

 that its point of origin lies not far distad from that of M.^, far 

 basad from the subnodus. The origin of M.^ appears to be placed 

 closer to the arculus than to the level of the nodus, viz. about four 

 or five cells distad from the arculus. M... and M^ are nearly paral- 

 lel for most of their lengths, and are separated by a single row 

 of cells, except for a short space distally. 



The arculus is strongly marked, with the sectors arising separ- 

 ately near its middle. The quadrilateral can be quite clearly' 

 seen in the left hindwing; it is broad, strongly built, with the lower 

 distal angle about 45°, and the upper or costal side only about two- 

 thirds as long as the lower or anal side. The basilar space is 

 broad and free. The discoidal field is broad, but carries only a sin- 

 gle row of cells for the first half of its length; distad fiom this. 

 M^ and Ctc, diverge widely, so that the number of cell-rows rapid- 

 ly increases. In the right forewing, the quadrilateral can be seen 

 to be considerably narrower than in the left hindwing. 



Between the cubitus and anal vein, basally, there is a clearly 

 marked cross-vein lying basad from the quadrilateral; this is cer- 

 tainly the anal crossing, Ac. Further distad, under the quadrila- 

 teral itself, there is another cross-vein. The anal vein itself 

 appears to run without any break below the quadrilateral, and 

 Cmj leaves the distal angle of the latter obliquely, and joins the anal 

 vein at a fairly acute angle. Thus the continuation of the vein 

 which we usually call Cm;, appears, in the wings of this larva, rather 

 as if it were really .4, with Cu.^ descending like an obhque vein 

 upon it. 



Cu^ and Cu.^ are separated by a single row of cells for most of 

 their lengths. Distally, however, Cu.^ arches strongly over before 

 reaching the wing-margin, so that the number of cell-rows above it 

 is much increased. Cm, ends up very slightly' beyond the level of 

 the nodus, Cu.^ somewhat before the same level, the ends of the 

 two veins being separated by six very small but quite clearly 

 marked cells. 



The very distinct narrowing of the base of the larval wing 

 shows quite clearly that the imaginal wing is of a somewhat petio- 

 late type. The most basal cross-vein visible in the anal space is 

 situated distad from the level of the arculus ; in fact, it lies distinctly 

 beyond the level of the cross vein already noted as occurring in 

 the subquadrangular space, below the quadrilateral itself. 



