148 



Inheritance in Philosamia Hybrids 



B.C. = Body cavity. 



B.C'e. = Blood cells. 



C.C. = Corrugated cuticle. 



C. S. = Smooth cxiticle. 



C. St'. = Cell (trichogenons) which pro- 

 duces a seta. 



i?.i'.C. = Extension of body cavity 

 into the distal part of the tubercle. 



F.B. = Fat-body. 



G. = Gland of unknown nature. 



Hy. = Hyi)oderniis. 



L.il/. = Section through muscle. 



N. = 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 section of a muscle. 



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



