148 



Inheritance in Philosamia Hybrids 



B. C. = Body cavity. 

 7i.C'e. = Blood cells. 

 C.C. = Corrugated cuticle. 



C, S. = Smooth cuticle. 

 C. Se. = Cell (trichogenous) which pro- 

 duces a seta. 



J?.J5.C.= Extension of body cavity 

 into the distal part of the tubercle. 



^.7^. = Fat-body. 



G. = Gland of unknown nature. 



Jf?/. = Hypodermjs. 



L.M. = Section through muscle. 



^. = Nerve. 



N. T. = Narrow passage between gene- 

 ral body cavity and that of the 

 distal part of the tubercle. 



Se.^Seta. 



T. = Tracheae. 



T.M. = Transverse sectionofaniudole. 



B.C. 

 Fig. 2. 



Semi-diagrammatic drawing of a well developed tubercle (Scolus). 



1 



