THE CANADIAN ENTOMOLOGIST. 57 



Sub-div. b. With an apical spot — no basal streak. 

 •• ; Costal and dorsal streaks, but no fasciae. 

 4. /.. Clemensclla. X. sp. 



Silvery or edistenine white. Antennae annulate above with brownish. 

 Apical half of the anterior wings pale golden, with four silvery white costal 

 and two dorsal streaks all dark-margined internally. 'The dark margin of 

 the first costal streak distinct, oblique, and produced along the costa to- 

 wards the base. The first dorsal streak opposite to the second costal, 

 oblique, pointing to the third costal. No basal streak. Apical spot 

 black, nearly circular. Hinder marginal line at the base of the dorsal ciliae 

 brownish^ broad, continuous with the hind margin of the second dorsal streak, 

 and reaching to but not passing around the apical spot : ciliae silvery-tinged 

 with pale golden. At. ex. ^ inch. Kentucky — common. Differs from 

 the next species, L. lucidicostella, in the points indicated by the italics, and 

 is, perhaps, a little smaller. Though the imago is common in April and 

 Mav, and I have made diligent search for the mine. 1 have never found it. 



I have taken the liberty of naming this pretty species in honor of the 

 late Dr. Clemens, who has done so much for this branch of American 

 I -epidopterology. 



Sub.-div. c. Both apical spot and basal streak. 



* No fascia, but both dorsal and costal streaks. 

 5. — L. lucidicostella. Clem., loc. cit. supra. 



Larva of first group. Tent mine on the under surface of the leaves of 

 .Sugar tree (Acer Saccharinum) and sycamore? (A pseudo-platanus). — 

 Imago in April, May, July and August. Abundant. At. ex. }{ inch, large. 

 Pennsylvania, Kentucky and Alabama. 



Z. Argentifimbriella, Clem., is described loc. cit. supra and Z. querci 

 albella. by Dr. Fitch, in ?'ol. 5 of his Xeu< York Reports; and both are 

 said to mine the leaves of oaks, but I have never found either in Ken- 

 tucky, nor have I ever seen them at all. Are they the same ? From the 

 descriptions I cannot see wherein they differ. 



L. Ai-entijindoriella and Z. lucidicostella are described by Dr. Clemens 

 in the same paper, and no doubt they are different species. Yet the 

 differences indicated by the descriptions are differences of degree, that is. 

 of intensity and extent of the markings rather than of kind, that is, of 

 location and pattern of coloration : and I have species of Z. lucidicostella, 

 which seem to me to meet die requirements of either description. 



