317 



this, lu' discovered the cxistenco of trumpet-liko setae, which as 

 he believos, caii open and Hhut. Ile also. discusses Zeuzera jri/rina 

 and Culassa expressa. 



Tsou found two punctures upon the prothorax of Cossus, idon- 

 tical in appearance with the base of a seta. 



BoAS (1899) examined the thorax of this kind and found a 

 rudimentary thoracic stigma on the intersegmental membrane be- 

 tween the mesothorax and the nietathorax, whilst he takes the 

 littlo spots, generally considered as rudimentary stigmata, for the 

 rudiments of the wings. 



Cossus cossus. 



Prothorax : S. dorsaUs^ s. dorsolateralis, s. suprastigmalis, s. sub- 

 dorsalis sHperior and .s'. subdorsaUs inferior and a special seta as 

 third in this series; in a little group before the stigma there are 

 three setae, probably agreeing with s. prostigmalis and two .s. in- 

 frastigmales, Two 8. basales, two 8. iwopedales, and s. ventralis. 



A prothoracic shield is wanting but a dark-coloured spot occurs 

 in its place. 



Mesothorax. S. dorsalis, s. dorsolateralis, s. suprastigmalis^ s. post- 

 stigmalis^ a little higher than usual ; s. prostigmaUs or .s. infra- 

 stigmalis, s. basalis, s. propedalis^ s. postpedalis and s. ventralis. 



I draw attention to the fact that in Quails figure of the first 

 instar four setae are marked above the rudimentary stigma (?), 

 and moreover one before, one behind, and two below it, making 

 eight in all, which consequently entirely agrees with my statement, 

 because s. ventraVts has not been mentioned by him. Tsou dist- 

 inguishes many more. 



Metathorax = mesothorax. 



Abdomen 1. S. dorsalis (smaller than the others) s. siibdorsaUs, 

 s. suprastigmalis^ s. poststigmalis (higher than usual) and one 

 s. prostigmaUs which can only be seen with a higher power; 

 two s. infrastigmales, s. basalis, three s. propedales, s. ventralis. 

 Segm. 2 = 1. 



On none of my specimens could I find Aj of Tsou. 



