July 2, 1920.] 



Agricidtural Gazette of N.S.W 



505 



producing fine serrations on the outer margin. These striations appear to be 

 caused by whorls of minute hairs. The larvae, as they near the pupal state,, 

 have darker coloui-ed antennte, and the thorax and body are mai"ked with 

 yellowish tints. 



The adult thrips has the eyes black or purplish red ; ocelli red ; and head 

 yellow, with the tip of the cone-shaped mouth dusky-brown. The antennas have 

 the first segment light-coloured and the others clouded with brown, darkest 

 toward the tips. The general colour of the thorax and the abdomen is yellow 

 with brownish bands across the abdominal segments ; the wings are yellowish- 

 brown with black featliery spines along the margins. The antennte are eight- 



Tobacco Leaf shewing damage caused by Thrips. 



jointed, but appear as if nine by reason of the oblique suture crossing the 

 sixth. The head is rounded in front, truncate behind, and wider than long. 

 The prothorax is as broad as the head, straight on the sides and rounded 

 behind ; the mesothorax is larger, fitting close against the metathorax, 

 which is contracted at the junction with the abdomen. The legs have the 

 femora short and rounded, and the tibite of the hind legs longest. The wings 

 are well developed and fringed with fine black hair^, and the abdomen is 

 elongate, broadly rounded on the sides, coming to a tubular point at the- 

 apex, and composed of nine segments. 



