the Lepidopterous Family Cossidae. 



173 



media. Cerostoma has an even more primitive neuration 

 in the fore-wing, the media being branched; but less so in 

 the hind-wing, the media, although well marked, being 



Fig. 28. — Cerostoma 

 radiatdla, Don. 



Fig. 29. — Chimabacche 

 fagdla, Fab. 



single and running near the costal edge of the cell. Evi- 

 dently in this instance it is the lower branch of the media 

 that is undeveloped. In Chimabacche the areole is large, 

 the chorda and media are, 

 however, extremely feeble, 

 though traceable. A little 

 further obsolescence would 

 have resulted in an appar- 

 ently simple areocel. The 

 most cossid neuration that 

 I have found among the 

 Tine idae o ccurs in T itt i n o n i is , 

 Meyr.,* a rather large form 

 from New Zealand, to which 

 my attention was directed by 

 Mr. J. H. Durrant. It is evi- 

 dently of an early undiffer- 

 entiated type with all the 

 veins present and separate. 



* Nosymna, an equally large form from Borneo, has somewhat 

 similar neuration with large areole and strongly developed chorda, 

 but the media is unbranched in both wings. It has smooth posterior 

 tibiae as in the Hyponomeutinae, but those of Titanomis are densely 

 hairy. Incurvaria pectinea, Haw., has nearly the same structure 

 as Titanomis, but the chorda and branched media of fore-wings 

 are very slender, almost vestigial. 



Fig. 30. — Titanomis sisyrota, Meyr. 



If we ask ourselves by what 



