72 PAPERS BY DE. B. CLEMENS. 



broad at their bases, the second dorsal opposite the second 

 costal streak. The basal streak is moderately broad, and 

 extends quite to the middle of the wing. Apical spot black; 

 hinder-marginal line blackish; cilia fulvous-gray. Hind- 

 Avings gray, cilia fulvous-gray. Abdomen pale fulvous. 



The larva mines the under side of the leaves of Ostrya, 

 and may be found early in Jury and October. The mine is 

 usually near the margin of the leaf, is flat at first, but is 

 gradually thrown into a fold, the separated epidermis cor- 

 rugated. When completed the epidermis has changed to a 

 pale brown colour. The larva undergoes its transformation 

 in a cocoon composed of " frass" and silk, in the form of a 

 small ovoid ball suspended within the mine. The larva is 

 cylindrical, with the body pale yellow, coloured on the dorsum 

 beyond the third segment dark green from the ingesta. The 

 imago appears in August and May. 



In the same leaf, mining the upper surface in a blotch 

 mine, at first white and subsequently brown, may be found 

 in October a Lithocolletis larva* of a different type from the 

 above. It tapers posteriorly, is flattened above and beneath, 

 with the rings distinctly separated and mammillated at the 

 sides; the first ring is rather abrupt anteriorly and much 

 broader than the head. The head is somewhat triangular, 

 flattened and thin, with the mandibles projecting in front as 

 two small, rounded appendages. The head is pale brown, 

 the body of the same hue, with dorsal, dark brown, elliptical 

 macula?, placed transversely on the segments. I have not 

 seen the imago and refrain from naming the species, lest it 

 may be identical with some one hereafter described. The 

 cocoon is circular, its outline being visible on the upper 



* I was at first disposed, from the description, to refer this larva to the genus 

 Tischcria, but on closely examining some cocoons sent me by Dr. Clemens 

 (from which unfortunately I did not rear any moths), I cannot decidedly say 

 they belong to the genus Tischeria ; moreover, a very singular fact is, that 

 these cocoons occur two or three on one leaf, and almost in immediate contact 

 with one another. II. T. S. 



