137 



Basychira ? Firmiana of my catalogue, but not a true Dasy- 

 chira ; and, as its changes in form and color in tlie larva state, 

 are very great and remarkable, I have called it AUasia, which 

 expresses its changeableness. At an early stage it has much 

 the appearance of the larva of B. ojyercularis, which, with 

 the pyzidlfcra, belongs to my new genus Lagoa (from ?.ayA<><;, 

 lepormus), having a short and soft-haired body, like a rabbit 

 or hare. The genera Lopliocampa and Euchcetes were formed 

 by me long ago, and I believe that I pointed out their pecu- 

 liarities and explained their etymologies when you were here. 

 They certainly belong to the Liparidce^ on the border of the 

 Ai'ctiadce, to which they closely approximate. Upon the latter 

 I have nothing to say, except tliat I wish that the larva of 

 Boisduval's Callimorpha? Lecontd were known, which would 

 settle the genus, and its place. Nudaria^ as it appears to me, 

 is very properly placed among the LitJiosiadce by Boisduval ; 

 and after leaving the family I think we ought to enter the 

 Noctuce by Apatela, and the genera similar to it, which Boisdu- 

 val includes among his Bomhycoides. 



I believe that I showed you a set of drawings of the ner- 

 vures of Lepidoptera which I made twenty years ago. They 

 contain most of the genera of our butterflies, about twenty 

 Botnbyces belonging to the nine families of my sketch in this 

 letter, and some Geometrce. These drawings have materially 

 assisted me in locating the families and genera, and given me 

 additional confidence in the arrangement which I have pro- 

 posed. I have also gathered some valuable hints in regard to 

 the details from Dennis and Schiffermiiller's Wiener Verzeich- 

 niss, and from Boisduval's Icones des Lepidopteres nouveaux 

 d'Europe. Boisduval really appears to me to be the most 

 philosophical and best instructed of our modern Lepidopterists, 

 and I only regret that he has not given his views more exten- 

 sively, and applied them to Extra-European moths. 



I have compared my Psyclwmorplia epimenis with the speci- 

 mens of Brephos parthenias and notJia, which you sent to me ; 



