( 22G ) 



GENERAL OBSERVATIONS 

 ON THE GENUS TISCHE- 

 RIA. 



Characteristic. 

 Among the smaller genera of the 

 LepiJoptera, the genus Tischeria is dis- 

 tinguished by the head being rough 

 behind, by the straight, rather droop- 

 ing palpi, and by the antennae being 

 coarsely ciliated in the male, with no 

 enlarged basal joint, but with a tuft 

 of hair attached thereto. 



Lithocolletis has a rough head, 

 but the antennas are longer and are 

 not ciliated. Elachista is of course 

 easily distinguished by the perfectly 

 smooth head. Bucculatrix is readily 

 known from Tischeria by the want 

 of palpi. 



The larvce have sixteen legs, but 

 all of them are very minute, and 

 therefore easily overlooked ; the 

 larvae are very flat, and with the 

 segments deeply incised, looking far 

 more like Coleopterous larvae than 

 Lepidopterous ; in some of the spe- 

 cies the hinder part of the body is 

 gradually pointed. 



The pupa is long and pointed, re- 

 markably active when touched, and 

 placed free in the silk-carpeted mine, 

 not in a cocoon. 



OBSERVATIONS GENERALES 

 SUR LE GENRE TIS- 

 CHERIA. 



Caractere essentiel. 

 Le genre Tischeria se distingue 

 parmi ceux des Micro- Lepidopteres 

 par la tete velue posterieurement, 

 par les palpes droits, un peu pen- 

 dants, par les antennes garnies chez 

 les males de gros cils, avec I'article 

 basal muni d'une petite toufFe de 

 poils. 



Les Lithocolletis ont la tete velue, 

 mais les antennes sont plus longues 

 et non ciliees ; les Elachista ont la 

 tete parfaitement lisse ; les Buccula- 

 trix se distinguent de suite des Tis- 

 cheria par I'absence des palpes. 



Les chenilles ont seize pattes, mais 

 toutes si petites qu'elles echappent 

 facilement a I'oeil de I'observateur ; 

 les chenilles sont bien plates, avec 

 les anneaux tres-distincts, et elles 

 ont bien plus I'aspect des larves de 

 Coleopteres que celui des chenilles de 

 Lepidopteres; dans quelques esp^cesla 

 partie posterieure du corps s'amincit 

 peu-a-peu. 



La chrysalide est longue et pointue, 

 tres-vi ve quand on la touche, et placee 

 librement dans la mine tapissee-de- 

 soie, sans etre entouree d'aucun 

 cocon. 



