248 AUSTRALIAN PSYLLID.E, 



median suture; lateral ocelli large, bright red, close to hind 

 margin of eyes. Thorax : pronotum broad, convex in front, 

 arcuate behind; dorsulum long, nearly truncate in front, some- 

 what angular at extremities; mesonotum large, convex, deeply 

 arcuate in front, rounded behind; scutellum resting upon hind 

 margin of mesonotum. Legs slender, tarsi long. Wings twice 

 as long as broad, rounded at tips, slender at base, costal nervure 

 stout, with subcostal forming a slender stigma : primary stalk 

 long, curving upward; stalk of subcosta long, curving upward; 

 radius long, curving upward, and running parallel with costal; 

 stalk of cubitus short, upper branch of cubitus curving upward, 

 upper fork long, turning downward, a little longer than lower 

 branch, forming a long cell; lower branch of cubitus transverse, 

 upper fork turning upward and then down; lower fork curving 

 round to the base; clavus stout, thickened; clavical suture long, 

 slender. Abdomen slender, yellow, with basal half of each 

 segment on both dorsal and ventral surfaces barred with dark 

 brown. Genitalia ((J) large, lower genital plate broad, rounded; 

 forceps broad at base, bending over like two bent fingers; penis 

 hidden; upper genital plate broad at base, rounded at apex. 



Hab. — Pera Bore, Bourke, and Condobolin, N.S.W. (in each 

 case upon Acacia pendula; W. W. Froggatt). 



This species appears to be peculiar to the Weeping Myall 

 (Acacia pendula) and probably ranges over the western country 

 where this tree grows. This insect can be found in all stages of 

 growth upon the twigs in November and December. 



PSYLLA ACACI^-DECURRENTIS, n.sp. 



(Plates xiv., fig. 7; xvi., fig. 5.) 



Larva. — General colour bright orange-yellow, dorsal surface 

 mottled with fuscous; legs and antennse fuscous. Head very 

 large, convex in front; with a faint median cleft running down 

 centre to base of abdomen; antennae very long, slender; eyes 

 large, far back on sides of head. Thorax ver}^ small, legs long. 

 Abdomen broad, rounded to apex, lightly fringed with hairs. 



