208 PAPERS BY DR. B. CLEMENS. 



silvery streaks, the one nearest the base of the wing short, 

 and the other extended to the middle of the wing, each shaded 

 along their margins with dark brown. On the inner margin 

 are three silvery dorsal spots, placed opposite the spaces 

 between the costal streaks. Near the tip of the wing is a 

 transverse, narrow, curved silvery line, passing from the 

 costa to the inner angle. At the base of the cilia are two 

 black converging lines, which do not meet opposite the apex 

 of the wing. Cilia silvery-white, tipped with dark fuscous. 

 Hind-wings dark brown; cilia the same. 



Antennas dark brown, very slightly annulated with whitish, 

 and the extreme tip silvery-white. Head dark brown, tuft 

 and face silvery-white. Labial palpi dark fuscous, the third 

 joint silvery-white. Feet annulated with white. 



The larva mines the leaf of the locust, making a blotch 

 mine on the upper surface of the leaf, with a number of 

 lateral galleries running out from it, on each side. Its habits 

 in all respects are similar to those of P. lespedezarfoliella. 

 I am unable to indicate exactly the month in which it should 

 be sought, as I have mislaid the notes made on this species ; 

 but I think it can be found in the latter part of spring. 

 I have always found the mines untenanted at the time the 

 leaf is mined by Lithocollctis Robiniella. 



In the Fifth Annual Report of New York State Agricul- 

 tural Society, Dr. Fitch describes two locust leaf-miners. The 

 first, An ac amp sis Robiniella, is unquestionably a Lithocollctis. 

 If Dr. Fitch has been led into no error, it is a new species, 

 and the specific name must be changed. The other species, 

 Argyrorniges Pseudacaciella, is identical with Lithocollctis 

 Robiniella* Proc. Acad. Nat. Sci., November, 1859, p. 319, 

 first described by myself a year or two previously in the 

 Entomologist, f published in London, by W. II. Stainton 

 (sic). P. Robiniella and L. Robiniella are the only miners 



* See ante, p. 66. II. T. S. 



f This allusion is to the Entomologist's Weekly Intelligencer, vol. 3, p. 125, 

 where some extracts from the letter of Decemher ]2th, 1857 (see ante, p. 8), 

 were inserted. II. T. S. 



