BY WALTER W. FKOGGATT. 279 



when numerous the foUage of the infested tree becomes aborted 

 and curled up from the immense number of woody galls. The 

 insect attacks the leaf from the underside, leaving a ragged scar 

 at place of entry; the galls f(row out on the other side, of a dull 

 yellow colour with a rounded mark on summit; the chamber 

 small, circular, just large enough to contain the larva. The 

 galls as they dry crack at the apex into four or five segments, 

 curling outward in a ver}^ peculiar manner after the psyllids 

 have abandoned them. I have cut the perfect psyllid out of 

 perfectly closed galls in which there was no opening, so that I do 

 not understand how the perfect insect makes its way out of the 

 gall; probably most of them are ready to come forth just as the 

 apex of the gall splits. 



This species is closely allied to Trioza multitudinea, Tepper, 

 described by Maskell from South Australia, but his description 

 of the galls and insects does not apply to this one, which is pro 

 bably a local species. 



Trioza circularis, n.sp. 



Larva similar in colour and form to that of the preceding 

 species. Dorsal surface flattened, thickly fringed on outer margin 

 with fine ciliated spines, hidden beneath an upper fringe of white 

 waxy secretion. 



Imago. — Length U'l, antennne 0*035 inch. 



General colour ochreous with yellow tints; abdominal segments 

 banded with dark brown; antennae yellow, apex of 4th-7th and 

 the whole of Sth-lOth joints fuscous ; wings hyaline, nervures 

 light brown. Head short, deeply divided in front, flattened, 

 rugose, with median suture and fovea on either side; rounded in 

 front to eyes, arcuate behind. Face. lobes short, broad, rounded. 

 Antennae long, slender; 1st and 2nd joints short, stout; 3rd very 

 long, cylindrical, thrice as long as broad; 4th-7th of uniform 

 length; 8th shorter; 9th- 10 very short, truncate at apex. Ej^es 

 very large, not as long as head, angular on sides : central ocellus 

 well up in centre of median suture; lateral ocelli large, on summit 



