BY R. J. TILLYARD. 451 



one cross-nervule in submedian space of all wings; 1-4 single cells 

 following triangle of hind wings (generally 1-2). Nodal Indicator 

 6 6-8] Head: eyes brown above, yellowish beneath; orbits 

 4 6-8 black behind, spotted with yellow; vertex, antennce and 

 ocelli black; front cleft medially, pale yellow with thick black 

 hairs; clypeus, labrum and labium mustard-yellow; mouth edged 

 with brown. Thorax: prothorax black, a short yellow collar 

 in front, a central yellow spot, and a larger anal yellow spot. 

 Meso- and metathorax hairy, black, a touch of yellow along dorsal 

 ridge; a pair of broad straight antehumeral yellow bands, some- 

 what hooked inwards anally, followed closel} r in front and behind 

 by a small yellow spot; below, on each side, a thick black band; 

 rest of sides yellow, with an irregular black mark in the sublatetal 

 suture running to thecoxse and sending a short transverse branch 

 upwards to join the black groundcolour in front; underside 

 mustard-yellow with a pair of elongated black spots and a round 

 dot between them; notum black, scuta and scutella yellow; several 

 tiny yellow points at the wing-bases. Legs black with stiff spines, 

 coxre yellow. Abdomen subcylindrical, flat underneath, 1-2 

 slightly swollen, 3-5 cylindrical, 6-9 dilated, but not so much as 

 in the two preceding species, 10 narrower. Colour: 1, very small, 

 black above, a transverse anal line, sides yellow; rest of abdomen 

 brilliant red in the mature insect; 2, with a black dorsal mark, 

 irregular, and generally shaped like a stalked goblet; a touch of 

 black on sides and on transverse carina; anal ends of all segments 

 more or less shaded with dull black, either as a narrow anal band 

 or a dorsal spot and a pair of distinct, very small, sublateral spots; 

 10 short, red. In the teneral insect only the tip of the abdomen 

 is red, the rest being orange, more or less marked with black. 

 Underside orange, ventral carina black. A p p en d a g e s : 

 superior 1-2 mm., wavy narrow sublanceolate, bases separated, 

 tips almost touching; slightly hairy, orange-red, pointed. Inferior 

 09 mm., subtriangular, tip slightly upcurved, dull orange; a small 

 bunch of hairs beneath it on 10. 



Mature males of this species show no signs either of pruin- 

 escence or any darkening of thorax and base of abdomen. 



