62 PAPERS BY DR. B. CLEMENS. 



Tuft little exceeding the front, scaly. 



Antennas ciliated in the $ . 

 Tisciieria. Anterior wings with four subcosto-marginal 

 veins, the first from near the basal third ; discoidal cell 

 not pointed, and two distinct discal nervules. 



Tuft scanty, not overarching the vertex. 

 Leucanthiza.* Anterior wings with three subcosto-mar- 

 ginal veins ; discoidal cell acute, with two distinct veins 

 from the apex. 



Head smooth. 

 Phyllocnistis. Anterior wings with three subcosto-mar- 

 ginal veins; discoidal cell pointed, with a single vein 

 from the apex, furcate near the tip. 



Lithocolletis, Zeller. 



Head roughened with an abundant tuft of hairs overarch- 

 ing the vertex. Front smooth, broad and retreating or 

 much retreating. Ocelli none. Eyes scarcely visible, and 

 partially covered with scales. Antennas simple, hardly 

 shorter than the anterior wings, with the basal joint mode- 

 rately thickened, but not expanded into an eye-cap. Max- 

 illary palpi none. Labial palpi filiform and drooping (in the 

 living insect ascending). Tongue naked, about as long as 

 the anterior coxa?. 



The anterior wings are pointed (from the outline of the 

 cilia appearing to be elliptical), the posterior lanceolate. In 

 the anterior wings the discoidal cell is acute behind; the 

 subcostal nervure sends two short branches to the costa, and 



* This genus, and the one succeeding' it, belong to the family Lyonetidce in 

 the system of European writers. The close relationship indicated in the struc- 

 ture of the perfect insects, and the general harmony of their histories, do not, 

 however, in my own view, authorize the separation of the genera here described 

 into distinct families. B. C. 



1 This is printed preceding, but Dr. Clemens has marked in pencil it should 

 be succeeding. H. T. S. 



