BY K. J. TILLYARD. 449 



2. N Dalei, n.sp. (Plate vi. fig. 2). 



(J. Total length 23-25 mm.; abdomen 15-16 mm.; forewing 

 17 5-185 mm., hind wing 16-7-17 7 mm. Wings: neuration 

 black, bases touched, with saffron for 1 mm. in forewings and 

 1*5 mm. in hindwings. Pterostigma 1 '3-1*6 mm., black, touched 

 with white at inner end and with a small triangular area of 

 white at its outer end. Only one cross-nervule in submedian 

 space of all wings. Triangle of forewings abnormal, the proximal 

 portion of the upper side about twice as long as the distal 

 portion; triangle of hindwings normal. 2-3 single cells following 

 triangle of forewings (generally 2). Nodal Indicator 5 5-6, 

 Membranide almost nil Head: eyes brown, occipital 4 5-6 

 triangle black above, yellow underneath, hairy; vertex and 

 antennce black; front well rounded, deeply cleft medially, yellow 

 covered with thick black hairs, a large black patch in front; 

 clypeus yellow, sometimes touched with black; labrum yellow 

 with a small black patch in the middle; labium yellow, mouth 

 edged with black. Thorax: prothorax black, with a small 

 dorsal double spot, yellow. Meso- and metathorax jet black with 

 fine hairs, a touch of yellow along the dorsal ridge; on each side 

 an antehumeral lemon-yellow band, narrow, slightly indented or 

 hooked inwards anally; sides bright yellow, with irregular black 

 lines in sutures, underside yellow; notum black, scuta, scutella, 

 and some small spots on wing-bases orange-yellow. In the more 

 mature insect these markings are all much duller and darker, 

 but I have seen no signs of pruinescence even on specimens taken 

 as late as February. Abdomen broader and less pinched than 

 in X. australis; 1-3 slightly enlarged, 4-5 very slightly 

 narrower, 6 widening, 7-9 dilated, but not so much, pro- 

 portionately, as in N. australis, 10 narrower. Colour : 1-4 

 orange-red marked with black as follows — 1, a transverse black 

 band; 2, dorsal area more or less widely black; 3, an irregular 

 longitudinal dorsal black band or line, enlarged anally, the trans- 

 verse carina more or less black; 4, a longitudinal dorsal black 

 band, enlarged at both ends, very variable; 5-6 very variable, 

 34 



