14 DR. BRACKENRIDGE CLEMENS' LETTERS. 



most valuable addition. A clever worker could learn I am 

 sure to denude and delineate in one day the wings of the 

 whole number described in a volume. I am awaiting, with 

 many pleasurable anticipations, the 2nd volume of " The 

 Natural History of Tineina," and am happy to perceive, by 

 the announcement in the " Weekly Intelligencer/' that it 

 treats of the genus in question. 



I suppose it is my right to name the insect which I have 

 described, and would propose Lithocolletis Robiniella. Does 

 it make a good specific name? The botanical genus Robinia 

 was created as a mark of distinction to John and Vespasian 

 Robin, French Botanists. 



Will you please return the enclosed sketches? I suppose 

 they would be of little value to you. You are, however, at 

 perfect liberty to make a copy and use it as you please. 

 During the next season I hope to be able to collect additional 

 parts of its history and to send you some of the pupae, with 

 perhaps many others. I have made drawings of the larvae 

 and mined leaves of several other leaf-miners, met with 

 during the course of the past season, but did not attempt to 

 rear them or secure the imago, having at that time no pins 

 with which to transfix them. I have just received a copy of 

 the " Entomologist's Companion," from which I hope to 

 derive much general information, that I need at present, on 

 this subject. Do you know any good means of distinguishing 

 the larvae of leaf-mining Diptera and Coleoptera from Lepi- 

 doptera? If you do, please tell me or inform me where 

 I can find it. 



I have written a longer letter than I intended when I 

 began, and must now beg you to believe me with sentiments 

 of high esteem and respect. 



Copy of my Reply to the above, dated January \\th, 1858. 



Your letter of the 12th December lies before me ; an extract 

 from it will appear in the "Intelligencer" of the 16th inst., and in 

 that of the 23rd I shall have a leading article calling attention to 

 your discovery. 



