CH. Ill] 



THE COCKROACH 



77 



upon the front legs very perfect combs specially adapted 

 for cleaning the antennae; for example, many beetles, 

 belonging to the section Geodephaga, have a deep notch 

 on the inner side of the front tibiae, the margins of this 

 notch are furnished with comb-teeth which effectually 

 clean the antenna when it is drawn through the notch. 

 It is however among the sting-bearing (Aculeate) Hy- 

 menoptera, such as ants, wasps and bees, that the 

 highest perfection is reached in this particular (Figs. 15 

 and 16). At the apex of the tibiae of these insects are 



Fig. 15. Portion of front leg of 

 Vespa germanica ? . Magnified. 



A.C. Antenna-comb. B B. Lines 

 marking portion represented 

 more highly magnified in Fig. 

 16. Cl. Claws on last joint 

 of tarsus. G. Semicircular 

 notch in which antenna is placed. 

 T. Tibia 1, 2, 3, 4, 5, 1st to 5th 

 joints of tarsus. 



Fig. 16. The part of Fig. 

 between the lines B B more 

 highly magnified. 



C.T. Comb-teeth : other letters 

 and figures as in Fig. 15. Note 

 the direction in which all the 

 bristles, both large and small, 

 slope. 



