BY R. J. TILLYARD. 447 



hind wings also abnormal, the proximal portion of the upper side 

 twice as long as the distal portion * One cross-nervure in sub- 

 median space of fore wing; two in that of hind wing. Membranule 



almost nil. Nodal Indicator 

 following triangle of forewings 



5 41 three to five single cells 

 4 4) (generally five). Head: 



eyes dark brown, paler beneath; vertex very small, tubercled, dull 

 greyish or blackish, antennce 1mm., black; front well rounded, 

 slightly indented behind medially, shining olive-grey, with stiff 

 black hairs; clypeus olive-grey, hairy; labrum and labium ochreous, 

 mouth edged with black. Thorax : prothorax dull blackish. 

 Meso- and metathorax downy, black, carrying above, in the less 

 mature specimens, a pair of narrow nearly straight antehumeral 

 bands, bright lemon-yellow, about 2 mm. long, and slightly 

 indented or hooked inwards anally; sides of thorax with a 

 broader straight lateral yellow band followed by a less regular 

 and slightly narrower black band below, then an irregular sub- 

 lateral yellow band, then a wavy black line in the suture; rest of 

 sides and underside yellowish; notum black, scuta and scutella 

 yellow. Legs black with stiff spines, coxse touched with yellow. 

 In the more mature insect all these markings are obliterated by 

 a covering of dull dark greyish pruinescence. Abdomen: 1-2 

 slightly enlarged, 3-5 very narrow cylindrical, 6 widening, 7-9 

 strongly dilated, flat underneath, 10 narrower. Colour : in the 

 less mature insect, 1-6 black marked with orange-yellow as 

 follows — 1, an anal transverse band or two elongated anal spots; 

 2, orange, with a large dorsal area of black of variable shape, but 

 generally much enlarged in the middle and stalked basally; 3, a 

 pair of large basal spots, a pair of central spots, and a pair of 

 very small anal spots, having an irregular black dorsal area, 

 stalked basally, but very variable in shape; 4, a pair of basal 

 spots and a pair of elongated central spots, or sometimes one long 

 patch on each side; 5, an elongated spot on each side; 6, a larger 

 suboval patch on each side. In the more mature insect 1-3 are 

 covered with dull grey pruinescence, the sutures, dorsal ridge, 



* I possess one or two specimens with the triangles practically normal. 



