56 STUDIES ON AUSTEALIAN THYSAXOPTERA, 



Larva : fourth stage. — Head longer than broad, deeply arcuate 

 in front, with antennae standing out in front as in the adult 

 insect; eyes projecting. General colour dull white; with head, 

 sides of pronotum, legs, antennee, spots of dorsal surface and anal 

 segments black. The broad red stripes down the centre and sides 

 of dorsal surface very well defined, anal tubular segments fringed 

 with long hairs at apex of first, but only lightly at tip of last. 



Pqipa. — Head narrow, broadest at hindmargin, the antennae 

 standing out on either side of head like short goat's horns; 

 general form of thoracic and abdominal segment elongate-oval, 

 tapering to the tip into a slender bristle-like appendage. Semi- 

 transparent, richly blotched and marked Avith bright red, only 

 black markings showing on small eyes and anal segments. 

 Second pupal form well defined, like the adult insect, with the 

 antennae curved round the sides of head and hidden under the 

 sides of prothorax, wing-covers well defined on back. The pupal 

 forms do not appear to feed, but remain resting on the leaves, and 

 move readily when disturbed. 



Imago ((J). — Length from ^ to J inch in length, excluding 

 antennae. General colour black except the ochreous marking on 

 antennae, and red blotches on thorax, legs, and sides of abdominal 

 segments. Wings pale horn-colour, with nervures ochreous and 

 cilia smoky. Head finely transversely striated, long, cylindrical, 

 rounded in front, thrice as long as broad; antennae ver}' long, 

 slender, clubbed at apices of 3rd-6th segments and tapering at tips; 

 eyes projecting, lateral ocelli large, in centre of inner margin of 

 eye, almost touching; proboscis pointed, not quite reaching to 

 fore margin of mesosternum ; upper lip pointed. Prothorax 

 irregularly hexagonal, not half the length of head, deeply arcuate 

 on sides between mesothorax which, swelling out on the sides, is 

 rounded to hindmargin of metathorax; meso- and metathorax 

 combined slightly longer than broad. Legs long; wings, some- 

 what pointed at the extremities, with the central nervure extend- 

 ing a little beyond middle of wing, very thickly fringed with long 

 cilia. Abdominal segments tapering to 8th segment, 8th forming 



