A Classification of Lepidopterous Larvae. 205 



on the mesothoracic segment. The retention of this primitive 

 character corroborates the above conclusion. The family must be 

 of g-reat age, and the wide distribution of its members, which are 

 found in all quarters of the globe, confirms this view. It is the 

 only famil}^ of Lepidoptera in which the females of all the species 

 are wingless, and they are probably the most degenerate of all such 

 females. I have examined three larvae. 



Oiketicus kirbyi Guilding. 



Mr. B. Xeumoegen has given me a number of specimens received 

 from a collector in Guadalajara, Mexico. In this species, as in all 

 the others, the seta? are very fine and difficult to determine, while 

 the tubercles have almost disappeared. The arrangement is that 

 of my Fig. 3, though I could make out but tw^o hairs on the base 

 of the leff. 



"»• 



Oiketicus townsendi Riley MS. 



This is the species shown in Fig. 3, which I have received from 

 Mr. T. D. A. Cockerel], of Las Cruces, N. M. The U. S. govern- 

 ment entomologist has attached the above name to it, I am informed. 

 It is to be hoped that Dr. Riley will soon give us an account of it. 

 Judging from the larval case, I have doubt about the propriety of 

 the reference to the ^enus Oiketicus. 



o^ 



Thyridopteryx ephemeraeformis Stephens. 



I have examined a specimen prepared by Mr. Wm. Beutenmiiller. 

 The setae are very obscure, and I could not make out any below 

 tubercle v. There is a circular corneous plate behind tubercle iii, 

 another bears tubercles iv and v, and there is a third one corre- 

 sponding in position to tubercle vi. 



The Generalized FrenatyE or Microlepidoptera. 



The term Microlepidoptera may be retained for these families, 

 though several are included which were formerfy classed among 

 the Macrolepidoptera. 



The modification of the primitive arrangement of the tubercles 

 begins in the tendency to consolidation of iv and v. Tubercles i 

 and ii are more nearly in line than they are in any of the Special- 

 ized Frenatae, and vii is developed into a distinct wart on the bases 

 of the legs, compensating for the absence of leg plates in this group. 



