:258 AUSTRALIAN PSYLLID.E, 



to a rounded knob at sides, rounded behind; mesonotum large, 

 slightly arcuate in front, swelling out, rounded on sides, slightly 

 .arcuate behind ; scntellum small, broad. Legs long, slender, 

 'Covered with fine hairs. Wings short, broad, not quite twice as 

 long as broad, broadly rounded at tips ; primary stalk long, 

 turning upwards, stalk of subcosta slightly longer, subcosta 

 running into costal nervure forming a distinct stigma; radius 

 short, turning upward at the tip; stalk of cubitus short, upper 

 branch of cubitus curving upward, then downwards; upper fork 

 turning downward, longer than lower fork ; lower branch of 

 cubitus short, upper fork long, curving upward and then down, 

 lower fork curving inwards; clavus stout, clavical nervure long, 

 crossing the length of anal cell. Abdomen : {$) slender, (9) 

 large, swollen. Genitalia : {$) large, lower genital plate short, 

 round at base; forceps very short, broad, blunt at tips, penis 

 small; upper genital plate broad at apex, slender, bending over 

 towards forceps, clothed with fine hairs; (9) very short, broad, 

 pointed at tips. 



Hah. — Sydney, N.S.W. (on Acacia Baileyana, F.v.M.; W. W. 

 Froggatt. ) 



The insects in all stages of growth cluster over the young 

 branchlets of the Acacia, so that in the early summer the trees 

 look as though they were infested with yellow aphides; they fly 

 off in a cloud when disturbed. The ei.'gs are slender, bright 

 yellow, and scattered all over the foliage, among which the larvae 

 and young pupse crawl about. 



It is a curious fact that wherever this pretty, ornamental 

 wattle is planted the psyllids appear. They swarm in my garden 

 at Croydon, and I have seen them away out in the bush at 

 Balmoral on the trees, and in several other localities, so that the 

 range of the species is probably that of the food plant. 



Genus Mycopsylla, n.g. 



Head deeply cleft in front; face lobes wanting; eyes very large, 

 antennae very large, slender. Thorax witli pronotum not as wide 

 as head, narrow. Legs long, slender. Wings nearly thrice as 



