CHAMBERS ON NEW TINEINA. 105 



the imago. I have known the mine for many years, but believed it to be 

 Dipterous until the fall of 1876, when I found specimens containing the 

 larva and others with the empty pupa case projecting from the mine. 

 Kentucky. 



NEPTICULA. 



N. QUERCIPULCHELLA, n. Sp. 



Closely allied to unifasciella Cham, and equally as pretty. The larva 

 is bright green, with a deeper green line of contents ; it makes a long, 

 narrow, winding, and gradually widening track, similar to that of N. 

 quercicastanella Cham, in leaves of Quercus alba, and is, I believe, the 

 only species of the genus which leaves an old mine to make a new one. 

 From the structure of Nepticulce larvse this would seem hardly possible, 

 but I do not know how otherwise to explain the fact that I have taken 

 a leaf containing a mine more than half finished, and which had evi- 

 dently been but a little while unoccupied ; and on the same leaf, not an 

 inch distant from it, was a new mine just begun, and yet containing a 

 large larva almost fully grown, and which had evidently just reentered 

 the leaf; the mine not being more than twice as long as the larva, and 

 in size answering exactly to the terminal portion of the empty mine, and 

 being in all respects exactly like it. After continuing to feed until the 

 new mine was something more than half an inch long, the larva left it, 

 and spun its cocoon on the earth in the bottom of the breeding jar, and 

 I bred the imago from it. The larva was well grown, certainly several 

 days old, when it began the new mine, and came from somewhere, whether 

 or not it came from the empty mine in the same leaf. The mine, larva, 

 and insect are larger than in quercicastanella. 



The head is black; antennae fuscous; occiput, eyecaps, palpi, and 

 feet yellowish- white, silvery ; thorax and fore wings deep blue-black (I 

 think so, though it is exceedingly difficult in so small and resplendent 

 a creature to get the correct hue), bronzed, and with purple and violet 

 reflections : the fascia is behind the middle, silvery- white, and a little 

 widest on the dorsal margin, and the wing behind the fascia is darker 

 than before it, whilst the cilia are paler and less lustrous than the wing ; 

 under surface of fore wing; cupreus-black, as also are the abdomen 

 and legs. Alar expansion two lines. Imago, June 19, after only a week 

 in the pupa state. Kentucky. 



N. JUGLANDIFOLIELLA, n. sp. 



Dr. Clemens gave this name to a mine and larva observed by him in 

 Walnut leaves; and as his description of the mine, as far as it goes, 

 answers to the mines from which I bred this species, I adopt the name. 

 I have, however, nearly always found several mines in the same leaflet 

 at the same time, and very much contorted and frequently crossing each 

 other. I did not observe that the larvsB difiered from other NepticuloB 

 larvse, though Dr. Clemens mentions its resemblance to the larva of a 

 Dipterou. The mines are common in the latter half of June, and the 



