288 AUSTRALIAN PSYLLID.E, 



coming to a point on either side; mesonotum large, arcuate in 

 front, rounded to apex. Legs long, slender, a claw at apex of 

 hind femora, last joint of tarsi long; apex of tibiae of hind legs 

 dilated, with marginal spines forming a group of three on inner 

 margin and one on either side, a slight spine also at apex of first 

 tarsal joint. Wings thrice as long as broad, curved round on 

 costal margin to tip, sharply rounded at tip; primary stalk rather 

 short, stout; stalk of subcosta very long, as long as radius, subcosta 

 short, transverse; no stigma; radius very short, turning upward, 

 with a transverse nervure crossing from centre to the junction of 

 furcation of upper branch of cubitus; stalk of cubitus short, one- 

 half length of stalk of subcosta; upper branch of cubitus long; 

 upper fork long, curving upward then turning down below tip of 

 wing, lower fork shorter; lower branch of cubitus short, upper 

 fork curving round then out at tip, lower fork short, curving 

 inwards; clavus long, clavical suture slender : granulated spots on 

 lower margin of wings, in centre of first cubital cell, and between 

 it and second. Abdomen stout, tapering to extremity. Geni- 

 talia : ((J) lower genital plate broad, rounded; forceps slender, 

 elbowed at base, curved in and pointed at apex; penis long, 

 slender; upper genital plate stout, curving over forceps, with a 

 keyhole-like notch on inner edge fringed with fine hairs: (9) 

 upper and lower genital plates short, slightly curved at tips. 



ZTa^. — Brisbane, Q. (on Hibiscus tiliaceus; H. Tryon). 



The larvae and pupae of this species are so thickly envelojDed in 

 white flocculent filaments that the undersurface of the leaves of 

 the infested bush becomes quite sticky and smothered with their 

 exudations. Mr. Tryon informs me the insects are very plentiful 

 upon this plant all round Brisbane. 



This is one of the most remarkable species that I have studied; 

 related in the form and structure of head and legs to the species 

 on the Kurrajong, which it also resembles in habits and earlier 

 stages of its life history; but the venation of the wings is very 

 distinct. The want of any costal cell or stigma, short radius, and 

 remarkable transverse cross nervures between the centre of radius 

 to furcation of cubitus place it quite alone. 



