57 



# 



this, he discovered the existence of trumpet-like setae, which as 

 he believes, can open and shut. He also discusses Zeuzera pyrina 

 and CuluttMt expre»sa. 



Tsor found two punctures upon the prothorax of Cossm, iden- 

 tical in ap|)eaninoe with the hiise of a seta. 



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

 rudimentary thoracic stigma on the intersegmental membrane be- 

 tween the m«»«othorax and the metathorax, whilst he takes the 

 little 8pot«, generally considered as rudimentary stigmata, for the 

 rudiments of the wings. 



COSSWS COtHtUK. 



Prothorax : S, dontalis^ a, <hrsolateralis^ s. supraMigmalis^ x. stib- 

 dorsntis superior and .«. KHbdorsalis inferior and a special seta as 

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

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

 fraMigmnhs. Two ». ftasalea, two .<». propedale^, and s. ventralis. 



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

 in its place. 



Mesothorax. S. dorsalis, s. dorsolateralis, 8. suprastigmalis, 8. post- 

 stigmalis, a little higher than usual ; s. prostigmalis or «. infra- 

 stigmalis, s. basalis, s. propedalts, s. postpedalis and 8. 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. ventralis has not been mentioned by him. Tsou dist- 

 inguishes many more. 



Metathorax = mesothorax. 



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

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

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

 two 8. infrastigmales, s. basalis, three s. jyropedales, s. ventralis. 

 Segm. 2 :^ 1 . 



On none of my specimens could I find A, of Tsou. 



