272 AUSTRALIAN PSYLLIDJi, 



tint, opaque and more robust in form. The second were sent to 

 the late Mr. A. S. Olliff from Western Australia, covering the 

 leaves of E. rudis in thousands; these are lighter-coloured than 

 the former, and somewhat smaller. This is the lerp for which 

 Mr. Olliff proposed to form a new genus Xylol yma, but he merely- 

 exhibited the specimens at one of the Society's meetings (Pro- 

 ceedings, 1894, p. 740), and did not publish anything in the shape 

 of description, if he had the adult insects. 



Rhinocola ostreata, n.sp. 

 (Plates xi., fig. 14; xiv., fig. 20). 



Larva* producing rounded lerp-scales upon the leaves of E- 

 gracilis; lerp 2 lines in diameter, convex, commencing at an 

 elongate flange at the base, swelling out and circular at apex, 

 attached to the lerp by the flange, but the encircling edge also 

 fitting close to the leaf-surface ; semi-opaque, dull horn-colour, 

 with a smoky tint produced in concentric rings from the flange, 

 giving it a regular circular formation. 



Pupa. — General colour bright red; antennas, legs, wing-covers 

 and markings on the dorsal surface of head, thorax, and abdomen 

 black; eyes dark yellow. Head broad, rounded in front, eyes 

 well back, on sides of head; antennae short, stout, and pointed at 

 tips. Thorax broad, flattened; wing-covers small, rounded at 

 tips; legs short and stout. Abdomen large, flattened, marked 

 with black spots on each segment, swelling out and rounded on 

 sides, slightly pointed on anal segment. 



Imago. — Length 0-16, antennae 0-08 inch. General colour 

 reddish-brown, thorax mottled with pink and ochreous tints, 

 antennae dark brown, abdomen banded with chestnut-brown, 

 genitalia red Head very broad, short and turned down, rounded 

 in front, with median cleft and central suture, a deep parallel 

 suture on either side. Face lobes hidden from above, short, broad, 

 and rounded. Antennae very long, rather thick, springing from 

 a depression in front of eyes, 1st and 2nd joints short and broad, 

 3rd longest, 4th shorter and more slender, 5th-8th decreasing in 



