S. A. Arbndsen Hein 



259 



On the other hand there are cases where in the reduced segment 

 (both by its length and the said constrictions) it is clearly observable 

 that the reduction arose from a fusion of the segments, even though 



Normal condition. 



Fig. 13. 1st leg 





7"^ 



Normal condition. 

 CL 



Fig: 14. 2nd 



Normal condition. Fig. 15. 3rd leg. 



the number of those constrictions is often less than the number of 

 segments the leg normally possesses. (Fig. 16 rf and d\) 



The numerical tarsal reduction may appear only in one leg or in 

 both legs of the pair. 



Conditions were observed where the tarsi of all six legs were reduced, 

 and this condition appeared, after isolation, to be hereditary, so that 

 strains could be reared in which all beetles showed the s^me q,aomaly 

 in each successive generation, 



Joarn. of Gen. x 18 



