HOLOMETABOLOUS INSECTS 



59 



predicament as with the deer's antlers, the chelae of male 

 Inachus, or any heterogonic organ which is regenerating, and 

 are driven to think of a limiting factor to growth, which we 

 have defined as the growth-partition coefficient. 



TABLE IV 



Mandibles in Lucanidae 



(a) Cyclommatus tarandus 



(data from Dudich, 1923 : ana- 

 lysed Huxley, 1927) 



2 



k 



x 

 20-38 

 24-01 

 26-38 

 27-76 

 29-65 

 32-20 



33-n 

 35-oi 

 36-13 

 37-32 



38-44 

 39-26 



41*34 

 43-22 



45-51 

 46-32 

 47-28 

 48-40 

 50-04 

 5i-5o 

 52-50 

 54-23 

 56-01 



62-06 



66-06 



69-00 



74-00 



178 



1-97, b 



y 



3-88 

 5'3i 

 6-33 

 7-32 

 8-17 



9-73 

 10-71 

 11-49 

 12-08 

 12-73 

 14-11 

 14-70 



15-84 

 17-39 

 18-83 

 19-19 

 19-92 

 20-79 



21-53 

 22-54 



23-25 

 23-96 



25-38 



28-49 

 30-69 



32-00 



34-50 



= just over o-oi 



(b) Lticanus cervus 



(data from Bateson and Brindley, 

 1892 : analysed Huxley, 1927) 



x 



(3i-o) 



38-65 



40-50 



42-55 

 45 -oo 



46-93 

 49-18 



53-6o 



2 = 48 



y 



(6-o) 



7-75 

 9-00 



io-oo 



II-20 



n-86 

 12-82 

 14-40 



k = about 2-3 



Lucanus lunifer 

 (data and analysis, Huxley, 1927 ) 



Figures in brackets ( ) indicate insufficient number of individuals 

 in class. 



In L. cervus and L. lunifer, x = 'total' length = (elytron length + 

 mandible length), mm. 



In C. tarandus, x = true total length = (body length + mandible 

 length), mm. 



y — mandible length, mm. 



k = growth-partition coefficient : the values given do not hold at 

 high values of x (see text). 



