190 



Bionomics of Cry})halus abiotis 



it widens out slightly into a triangular-shaped knob showing very fre- 

 quently rounded projections on either side. The ring, on the whole, is 

 circular in shape and surrounds the sheath of the penis. In a lateral 

 aspect (Fig. 11) of the chitinous portion of the penis, the dorsal portion 

 of the ring is seen to be drawn out to a point which projects anteriorl3^ 

 This drawn-out portion of chitin is called by Hopkins^ the apodemal 

 process {A.). 



The sheath, roughly speaking, may be considered as a hollow 

 chitinous cylinder tapering posteriorly and bearing on its anterior edge 

 two chitinous rods known as the femora {Fe.). In the following columns 

 I contrast the main characters of unripe and ripe reproductive organs 

 of the male, which proved useful to me in differentiating them. 



Unripe 

 Testes white. 



Vas deferens, i.e. portion between testis 

 and seminal vesicle, dirty white in colour. 



Seminal vesicle small. 



Accessory glands short and thin, only 

 slightly developed. 



Ripe 



Testes yellowish. 



Vas deferens, i.e. portion between testis 

 and seminal vesicle, yellowish in colour. 



Seminal vesicle swollen. 



Accessory glands greatly lengthened. 



Fig. 12. liuinatmc female reproductive organs of ('. abidis (greatly magnified). 



' Hopkins, Preliminary Classification of the Superfamily Scolytoidea, Technical 

 Scries, No. 17, Part ii, fKS. Jinrcnu of Eiifomnlogi/, mi 5, p. I'K} el .sty. 



