21 



Classification of the Noctuidae based on 

 the Structure of the male Genitalia. 



The CymatophOPidse are a very distinct group 

 of the Heterocera. They are at once distinguished 

 from the Noctuidce by the fact that the uncus is 

 trifurcate. The present grouping is fairly correct. 



Thyatipa derasa. 



Harpes simple without armature ; the sacculus forming 

 a projecting hook on the outer margin ; uncus trifurcate ; 

 vesica with a mass of teeth. 



BatiS. From John Gardner. Pencils present. 



Harpes shorter than preceding species ; sacculus projecting 

 from the outer margin ; uncus trifurcate. 



The CymatophOPas are by no means as easy to 

 determine. First I should place as being a near approach 

 to Thiatira ; diluta, having simple harpes, with the 

 sacculus produced ; fluctuosa has also the sacculus 

 strongly marked ; ocularis and or, having a distinct form 

 of- uncus, seem almost to require a separate genus; 

 duplaris again has such a distinct form of uncus, and 

 harpe, that it must also be separated from the 

 Cymatophoras, and could be easily included in the same 

 genus as coryli, to which on account of the similarity of 

 the uncus it is evidently closely allied. 



Cymatophopa diluta. From R. Hughes. 

 Harpes simple ; sacculus ending in hook set with scobinated 

 teeth ; uncus trifurcate ; aedoeagus dentated, and divided 

 at the tip; vesica simple; juxta composed of two antler 

 like processes scobinated. 



