BY WALTER W. PROGGATT. 243 



margin of the body. The wattles (Acacias) are very rich in these 

 insects, several of them having two or more peculiar species; so 

 that the range of many is probably as wide as the distribution of 

 the host plants. The eggs are generally laid all over the tips of 

 the young foliage, or if on the branchlets thickly encrusting them, 

 with the larvae, pupae, and perfect insects all crawling about on 

 the same branch. In some cases these are so numerous that at 

 first sight they look like aphides. 



Judging from the numbers obtained in New South Wales 

 where these insects have received most attention in this country, 

 Australia will be found to be the richest region in this group of 

 the Homoptera. 



E. H. Riibsaman has described a new species (Pmtropsylla 

 udei) from Sumatra* the larva of which produces a gall, and 

 is exactly like the typical Trioza larva from his drawings, but the 

 perfect insect, also figured, belongs to the Fsyllince. He also 

 figures several other Trioza larvae from Africa, and another from 

 South America, but does not name them. 



Genus P s y l l a, Geoffroy. 



Head triangular, transverse; face lobes convex, conical; eyes 

 semiglobose, prominent; antennae slender, first two joints thickest. 

 Thorax with front margins acute. Legs stout. Wings broad, 

 rounded at apex, stigma distinct; stalk of subcosta longer than 

 stalk of cubitus; radius stout, seldom curving downward to any 

 distance; wings frequently semiopaque and sometimes spotted; 

 nervures stout. 



PSYLLA ACACIiE-PYCNANTH^, n.Sp. 



(Plate xiv., tig. 5.) 



Larva reddish-yellow, thickly mottled with black ; antennae, 

 legs and wing-covers slightly mottled with fuscous ; centre of 

 abdomen tinged with red, outer margins fringed with long hairs. 



Pupa similar in colour, but with the markings more defined; 

 antennae yellow, with apex of 3rd, 5th and whole of apical joints 



* Mitteilungen iiber neue unci bekannte Gallen, 1899. 



