156 



Dr. A. Jefferis Turner's Observations on 



By this definition the genus Paracossus, limps., is 

 excluded from the family, and will be dealt with separately. 



To the definition the following particulars must be 

 added : Moths of moderate or large, sometimes exceedingly 

 large, size. The larvae so far as known, and probably in 

 every case, are internal feeders living in wood. The frons 

 is usually flat, but may have a projecting tuft of scales. 

 The labial palpi may be moderate and porrect, or short, 

 or obsolete. The antennae are rarely simple in both sexes, 

 frequently bipectinate in both sexes to apex, in one genus 

 unipectinate, frequently with a double row of long pecti- 

 nations in the <$ for part of their length, the pectinations 



Fig. 1. — Cossodes lyom H, 

 White. 



Fig. 2.—Dvdgeona actinias, 

 Turn. 



usually ceasing or shortening abruptly, and the apices 

 simple or shortly bipectinate, but simple or shortly bipec- 

 tinate from base to apex in the $. The tibial spurs are 

 long and well developed in some of the more primitive 

 genera, but frequently very short or obsolete. The frenulum 

 is sometimes short, not articulating with the retinaculum, 

 and apparently non-functional. 



We will commence our survey of the neuration with two 

 of the most primitive genera, Cossodes and Dudgeona. 

 Both geneni have long, well-developed tibial spines and 

 rather long palpi, which are unusual in the family, and 

 confirm the conclusion, that 1 draw from their neuration, 

 that they are primitive types. Cossodes has simple antennae 



