NATURAL SCIENCES OP PHILADELPHIA. 317 



on each side. Elytra rufous on the sides, parallel, convex, cut off square at 

 the apex, densely and distinctly puncttyed, suture a little raised. Epipleurae 

 bistriate. Legs rufous. Antic tibiae dilated, fiv e-dentate. Length -1. 



The European species, to which this is very n early allied, has no margin to 

 the thorax, but merely a marginal stria. Our sp ecies wants the small furrow 

 at the exterior base of the margin of the thorax. The thorax is moreover more 

 finely and sparsely and the elytra more coarsely punctate. 



In my Monograph of these insects,, the American was considered identical 

 with the European species. 



Contributions to American Lepidopterology.No. 2. 

 BY BRACXENRIDGE CLEMENS, M. D. 



TlNEINA. 

 LlTHOCOLLETIDwE. 



Imago with pointed or almost caudate anterior wings, with the costal ner- 

 vure rather short and nearly coincident with the basal portion of the anterior 

 margin ; with the subcostal simple from the base to the apical third of the 

 wing, where it delivers to the costa two or three very short marginal nervules 

 (except in Tischeria ;) with the discoidal cell usually acute behind, with one or 

 two branches to the tip of the wing: with the median simple nearly to the 

 tip, and dividing into two approximated nervules, with the submedian simple. 

 Tne posterior wings linear- lanceolate, with a very short costal nervure at the 

 base ; with the subcostal nervure simple ; with the median nervure simple and 

 both rather faintly indicated. 



Table of Genera. 



Head with a tuft above. 

 Tuft abundant and hairy. 

 Antennas simple. 

 Lithocolletis . Anterior wings with two subcosto-marginal veins and 

 one from the apex of the discoidal cell- 

 Tuft little exceeding the front, scaly. 

 Antennae ciliated in the ^. 

 Ti s che ria. Anterior wings with four subcosto-marginal veins, the first 

 from near the basal third ; discoidal cell not pointed and two distinct discal ner- 

 vules. , l 

 Tuft scanty, not overarching the vertex. 

 Le ucanthiza .* Anterior wings with three subcosto-marginal veins ; dis- 

 coidal cell acute, with two distmct veins from the apex. 



Head smooth. 

 Phyllocnistis . Anterior wings with three subcosto-marginal veins ; dis- 

 coidal cell pointed with a single vein from the apex, furcate near the tip. 



Lithocolletis Zeller. 



Head roughened with an abundant tuft of hairs overarching the vertex. 

 Front smooth, broad and retreating or much retreating. Ocelli none. Eyes 

 scarcely visible and partially covered with scales. Antenna? simple, hardly 

 shorter than the anterior wings, with the basal joint moderately thickened, but 

 not expanded into an eye-cap. Maxillary palpi none. Labial palpi filiform 

 and drooping, (in the living insect ascending.) Tongue naked, about as long 

 as the anterior coxae. 



* This genus and the one preceding it, belong to the family Lyonetidae in the system 

 of European writers. The close relationship indicated in the structure of the perfect in- 

 sects, and the general harmony of their histories, do not, however, in my own view, au- 

 thorize the separation of the genera here described, into distinct families. 



1859.] 



