280 AUSTRALIAN PSYLLID.K 



Lerp gall as much as 4| lines in diameter, red to brown in 

 colour, general form rounded, turning up, and narrow at base; 

 under side curving upward to the leaf, being open but covered 

 with an opaque horn-coloured lerp, 2 lines in diameter, curled 

 upward with a rim on the lower edge so that it is half gall, half 

 lerp. 



Ptipa. — General colour : head pale green, thorax and abdomen 

 deeper green; antennae, legs, front of head, and centre of thorax 

 yellow ; two elongate spots between eyes, wing-covers, and a 

 double row of spots on abdominal segments black. 



Imago. — Length O20 inch, antennae (1) 



General colour pale green, legs yellow, antennae and thorax 

 marked with yellow; scutellum black; wings semiopaque, horn- 

 colour, nervures ochreous. Head small, not as broad as thorax, 

 lobed in front, and sloping down to eyes, median suture ridged 

 with a very large fovea on either side occupying the whole of the 

 forehead, arcuate behind. Face lobes very large and bi'oad, 

 slightly truncate at tip Antennae slender, 1st joint stout, 

 cylindrical, 2nd joint half as long as first, 3rd longest, 4th-9th 

 uniform in length, 10th shorter, swelling out and rounded to a 

 pointed apex. Eyes large, hemispherical, projecting on the sides: 

 central ocellus at apex of median suture; lateral ocelli large, 

 well up on hind margin of head. Thorax : pronotum narrow, 

 wrinkled; dorsulum very large, rounded and convex, produced into 

 a point on sides, and slightly truncate behind; mesonotum deeply 

 arcuate in front, rounded on sides to hind edge which is truncate; 

 scutellum truncate in front, rounded behind. Legs short and 

 stout. Wings nearly thrice as long as broad, rounded on front 

 margin and at extremity; primary stalk moderately long, stalk of 

 subcosta short; subcosta long, running close beneath costal nervure 

 past middle of wing; no transverse nervure or stigma; radius 

 long, curving round and coining out near tip of wing; stalk of 

 cubitus long, upper branch long, upper and lower forks turning 

 downward, upper longest; lower branch short, upper fork long, 

 curving sharply upward and then downward, lower fork curving 

 outward forming a long cell; clavus short, stout, clavical suture 



