LY WALTER W. FROGGATT. 297 



thrice as long as broad, rounded in front to a sharply curved tip, 

 broadest at second cubital cell, primary stalk long; stalk of sub- 

 costa short; costal cell short, broad; stigma short, angular, rounded 

 in front; radius long, curving downward, emerging at tip of wing; 

 stalk of cubitus longer than subcosta, upper branch of cubitus 

 curving upward, upper and lower forks forming a short broad 

 cell, lower branch of cubitus very short, upper fork curving 

 upward, lower fork very short, turning sharply downward, forming 

 a very short, broad cell; clavus stout, clavical suture very distinct. 

 Abdomen short, stout. Genitalia (£) very long, stout, sabre- 

 shaped, rounded at base, upper valve longest, slightly truncate 

 at tip. 



(J. Smaller than £, with no black markings upon wings, and 

 of a uniform brown colour with pale reddish tints. Abdomen 

 very short. Genitalia (£) very large, lower genital plate elongate, 

 rounded at apex; forceps large, curved upward; upper genital 

 plate longer and more slender than forceps. 



Hab. — Thornleigh, Botany, Mittagong, N.S.W. (on E. piperita; 

 W. W. Froggatt). 



The larvae form no lerp but hide under loose bits of bark 

 on the trunks of several white-stemmed gums, thickly enveloped 

 in white flocculent matter, thickest round the abdomen, which 

 exudes from beneath their shelter and reveals their hiding place, 

 and when abundant dots the trunks all over with white blotches. 

 Other colonies are found congregated on the stems of small trees, 

 where they are frequently covered by ants with a thick felted 

 sheath of woody debris, sometimes extending for four or five feet 

 from the ground and completely sheltering them. The ants, 

 Iridomyrmex nitidus, Mayr, swarm over them in this covered 

 gallery, and evidently protect them for the sake of the honey- 

 dew that is secreted. 



Tiiea opaca, n.sp. 

 (Plates xi., fig. 5; xii., fig. 14; xiii., figs. 1-4). 



Larva similar in appearance to that of T, formicosa, but of a 

 more uniform ochreous colour; thoracic markings similar. 



