284 AUSTRALIAN PSYLLID.E, 



the outer margin of the shield-shaped larva is smooth, but in the 

 later stages of development there is a regular marginal fringe of 

 white waxy filaments round the pupa. 



This species has a wide range, probably as wide as the food- 

 plant, as I have them from the Northern Rivers (Lismore) to 

 Gippsland in the south. When badly infested the foliage of the 

 food-plant becomes much discoloured, tinted with reds and 

 yellows, and twisted, corrugated and aborted. Though the insects 

 seem to be firmly attached to the leaves, when they were kept in 

 jars for observation they detached themselves and crawled about 

 as soon as the foliage began to wither. 



I have a series of specimens obtained on some undetermined 

 shrub (probably E. Smithii) at Clifton some years ago, in which 

 the cross-nervures between the primary stalk and the costal 

 nervure are clouded with black, and the clavus is blotched, 

 markings which I have never found on the typical form. This, 

 however, may be a distinct species, but in the absence of more 

 fresh material, I regard it as a seasonal variety of the typical 

 form. 



TrIOZA CASUARIN.E, n.sp. 



(Plates XV., fig. 11; xvi., fig. 27.) 



Tupa dark ochreous to darker brown. General form long, 

 slender, thrice as long as broad; dorsal surface convex; head 

 rounded in front to behind eyes, showing a fine median suture 

 running back to base of abdomen. There is no distinct division 

 between head and thorax. Eyes large, projecting ; antennae 

 represented by two small pointed horns between eyes. Thorax 

 constricted behind head, swelling out again and sloping round to 

 base of abdomen; wing-covers not showing, legs hidden from 

 above; abdominal segments tapering slightly to a rounded tip, 

 divisions distinct; ventral surface flattened, showing a fine median 

 suture, and small legs. Front of head fringed with fine hairs; 

 the outer margin forming a slender flange which encircles the 

 whole insect. 



Imago. — Length 0625, antennae 0'015 inch. 



