182 



Dr. A. JefTeris Turner's Observations on 



Noctuidae, Arctiadae, Liparidae, Notodontidae. — We will 

 consider these four families together. I have picked out 

 one genus from each showing a well-marked areole and 

 chorda of typically cossid form. I see no reason to doubt 

 that it is actually a primitive areole. A secondary areole 

 not homologous with the primitive areole is a possibility, 



Fig. 48. — Agrotis pronuba, Linn. 



Fig. 49.— Palaeosia bkosta,W)k 



as I have pointed out when describing the neuration of 

 Gazera, one of the Castniadae, and if such a structure was 

 formed in a genus, in which areole and cell had coalesced 

 to form an areocel, it might even be impossible to dis- 



FiG. 50.- Orgyia mendosa, Hb. 



Fig. 51. — Gargetta costigera, Wlk. 



tinguish it by inspection from a primitive areole. although 

 morphologically of different origin. But there are two 

 strong reasons for believing that- this has not occurred 

 in the Noctuidae, Arctiadae, Liparidae, and Notodontidae: 

 (I) in these families there are genera which demonstrate 

 the gradual obliteration of the areole by coalescence, but 

 no genera exist in which there is any approach to the 



