Zool.— Vol. I.] 



CALVERT— ODONATA. 



4°5 



males have the brown spot on all the wings as described in 

 the third paragraph. The variations in neuration are shown 

 in the following tables: — 



Front Wings. 



Number of 

 individuals 

 examined. 



Triangle. 



SUBTRIANGULAR SPACE. 



2-celled 

 both 

 wings 



3-celled 

 both 



wings 



2-celled 



one wing 



3-celled 



other 



wing 



3-celled 

 both 

 wings 



2-celled 

 both 

 wings 



3-celled 



one wing 



2-celled 



other 



wing 



2-celled 



one wing 



i-celled 



other 



wing 



213 



25$ 



18 

 17 



I 

 I 



2 



7 



7 

 6 



5 

 6 



8 

 8 



I 

 5 



46 



35 



2 



9 



13 



11 



16 



6 



Hind Wings. 



Number of 

 individuals 

 examined. 



Triangle. 



3-celled 

 both 

 wings 



2-celled 

 both 



wings 



i-celled 

 both 

 wings 



3-celled 



one wing 



2-celled 



other wing 



2-celled 



one wing 



i-celled 



other wing 



2 

 I 



20 6 l 

 25? 



O 

 I 



14 

 21 



I 

 O 



3 

 2 



45 



I 



35 



I 



5 



3 



1 Not 21 as in the first table, as the hind wings of one male were destroyed. 



These tables seem to justify the conclusion that the num- 

 ber of cells in these areas are not characters of specific value. 

 Moreover, the data on which these tables' are based permit 

 the following statement: Variations, symmetrical or asym- 

 metrical, in the number of cells of any one of these three 

 areas, viz., the triangle of the front wings, the triangle of 



