I 



I 



BY WALTER W. FROGGATT. 327 



as long as broad; primary stalk curving up; stalk of subcosta long, 

 subcosta forming a long slender stigma; radius short; stalk of 

 cubitus short, upper arm curved upward, short; upper and lower 

 forks turned down, forming a long cell a little shorter than the 

 arm; stalk of lower arm of cubitus rather long, upper fork long, 

 curving round, lower fork curving inward; clavus slender; clavi- 

 cal suture very distinct. Abdomen long, slender. Genitalia : 

 ((J) lower genital plate rounded beneath; forceps short, straight 

 and thick; penis small; upper genital plate finger-shaped, bent 

 forwards at tip. 



Hab. — Hobart, Tasmania (on foliage of Acacia dealbata; A. M. 

 Lea). 



PsYLLA GRACILIS, n.sp. (Plate iv., fig. 7). 



I mayo. — Length 0-065, antennie 0*0325 inch. General colour 

 light green, slightly tinged with yellow on head and thorax, eyes 

 light brown; antennte, except tip which is fuscous, pale ochreous; 

 legs of the same colour, with tarsi fuscous; wings transparent, 

 nervures light-coloured. Head broad, swelling out, and rounded 

 in front, deeply arcuate behind, with a slight median suture and 

 shallow fovea on either side. Face lobes closed from base, large, 

 broad, projecting, rounded at apex. Antennae long, slender; 1st 

 joint stout, swollen; 2nd short, cylindrical; 3rd very long; 4th-8th 

 slender, decreasing to apex; 9th-10th short, slightly clubbed. 

 Eyes reniform; central ocellus very small, almost hidden from 

 above, lateral ocelli rather small. Thorax : pronotuni narrow, 

 curved, deeply arcuate behind, rounded on sides, reaching to hind 

 margin of eyes; dorsulum short, broadly rounded in front, 

 truncated, and narrow at extremities, nearly transverse behind; 

 mesonotum large, broad, nearly truncate in front, and produced 

 into rounded lobes on the sides, sloping down and rounded to 

 apex, scutellum small. Legs rather long, tibia3 slender, tarsi 

 small. Wings long, slender, rounded to tips, nearly thrice as 

 long as broad; primary stalk stout, turning upward; stalk of sub- 

 costa long, no distinct cross vein, but costa forming a long slender 

 cell; radius long, curving upward and emerging above tip of 



