284 AUSTRALIAN PSYLLIUM, 



This species was described by Schwarz from South Australian 

 specimens. He says that, "It is distinguished from all other 

 described genera of this tribe by its vertical head and the form 

 of the frontal processes." The venation of the wings is similar 

 to that of the genus Rhinocola, in which I had placed it before 

 seeing Mr. Schwarz's definition of Cardiaspis. He supposes that 

 the large size of the lerp-scale in comparison with the larva is 

 accounted for by the fact that the latter is enveloped in a mass 

 of woolly secretion. But none of our lerp-producing Psyllids are 

 remarkable for this excretion which is unusually scanty in com- 

 parison with that present in the naked forms of larvae. 



Cardiaspis plicatuloides, n.sp. 

 (Plates xi., tig. 7; xii., fig. 18; xiv., fig. 9). 



Lerp chocolate-brown, H lines in diameter, massed together in 

 clusters of 30-40 or sometimes singly, upon the leaves of E. 

 rostrata and several other Eucalypts. General form like that of 

 the valve of the bivalve shell, Plicatula cristala, Lam.; attached 

 closely to the leaf, curving upward, banded with five distinct 

 parallel ribs, with shorter ridges between them to the margin; 

 the crystalline secretion between the ribs finely striated. 



Pupa very small in proportion to the size of the lerp; general 

 colour dull white; head, antennae, legs, wing-covers and apical 

 half of abdomen light brown; a pale parallel bar running through 

 centre of head and thorax, the latter also dotted with black 

 forming a square. 



I mayo. — Length 01 -t, antennae 05 inch. 



General colour of head and thorax ochreous to brown; behind 

 eyes, antennas, base of wings, and basal portion of abdominal 

 segments red; antennae and apical edge of abdominal segments 

 black; wings semitransparent, slightly clouded, nervures pinkish- 

 brown. Head short, as wide as or wider across than thorax, with 

 a deep median suture, much wrinkled, rounded on sides, arcuate 

 behind. Face lobes projecting, broad and rounded, clothed with 

 fine hairs. Antennae very long and slender, lst-2nd joints small, 



