36 DR. BEACKENRIDGE CLEMENS' LETTERS. 



shutters to an outhouse. The cases are cylindrical, about 

 two lines long, and the free end is closed like a three-sided 

 pyramid, while the mouth is slightly curved. I allude to 

 them here because, a few days ago, I removed the cases from 

 the glass tube in which they have been since I first found 

 them, with the intention of opening them to ascertain what 

 they contained. Much to my surprise I found the larva? in 

 both were living, before I succeeded in opening the cases, 

 which appear to consist of tough silk. As no imagos ap- 

 peared during last summer, I supposed the larvae were dead, 

 and I am astonished that they should be living now after 

 having passed nineteen months in the larva state without 

 food. 



My published generic diagnosis of Aspidisca is erroneous 

 in one or two particulars. The two specimens from which 

 this was drawn were not well set, and I suppose I must have 

 injured the oral parts in my microscopic examinations. I 

 have corrected these errors in my last paper, the fifth, now 

 in press. The correction is, that the labial palpi are ex- 

 tremely short and slender, much separated. Tongue naked, 

 and scarcely as long as the anterior coxa?. 



The miner in the leaf of Hickory of which I spoke in one 

 of my previous letters is not an Antispila as I supposed, but 

 another species of Aspidisca very like Splendorifcrella, yet 

 specifically distinct. 



If there are any species I have described you would like to 

 examine or to possess specimens of, I will send them to you, 

 if you will specify them, in August, through the Smithsonian 

 Institution. I cannot promise, however, to send specimens 

 of all the Tineina I have described, for frequently the descrip- 

 tions have been drawn from a single specimen which has been 

 deprived of one pair of wings. 



Yesterday I found the $ of Anarsia ? pruniella ; it is the 

 same as the European, and the genus is no longer question- 

 [ able. * a* 



?/ 





