OF THE FAMILY COCCI DAI. 139 



Classification and Interrelationships of the Coccidae based on the Males 

 Groups of Genera. 



A. The characters, which were found from an examination of Table i to separate 

 groups of genera, are listed in Table 2. The table contains 34 characters and 

 shows their distribution among the material studied. It will be noticed that a few- 

 characters are included of which the alternate conditions occur within the same 

 group (thus only separating genera), but which are of significance in separating 

 other groups. The characters which are exclusive to any particular group are 

 indicated with an asterisk (*) and their total number is given at the end of the 

 table. The number of these characters will be reduced as more information about 

 other members of the family becomes available and it must be stressed here that 

 because of the limited number of species studied the diagnosis and discussion of 

 relationships are very tentative. 



To investigate the relationship between groups the method «>t analysis used by 

 Ghauri (10.62) was followed, and the following were calculated : 



(a) the number of characters shared by any two groups, 



(b) the number of characters exclusive to these two groups, and 



(c) the number of characters by which the two groups differ from each other. 



The results are given in Table 2 A. The characterization of each group is implicit 

 in Table 2 and given fully in the keys which follow later. 



Table 2. 

 List of characters whk h separate major Groups of Genera 



Characters Eule- Erie- Ingli- Coccus 



canium peltis sia 



I [bad: 



1. In lateral view: a. Flat. B. Dorso- 



ventrally elongated or rounded. b a* b b 



2. Length of antenna in relation to 

 length of posterior leg: a. 1 05 or more 



times longer. B. Snbequal or shorter. AB a a b 



3. Interocular ridge: a. Present. 



b. Absent. ab a b b 



4. Postocular ridge: a. Forking below 



ocellus, b. Not so. a b* a a 



5. Midcranial ridge, vcntrally: 



a. Reduced, b. Not so. b ab a b 



6. Number of simple eyes: a. 4. 



b. More than 4. ab a b a 



