188 ENTOMOLOGICAL SOCIETY 



Lithocolletis basistrigella Clemens. 



One type in good condition, Clemens' No. 17; alar exp., 

 8 mm. 



Bred specimens of this well marked species, compared with 

 the type, are in the U. S. National Museum. The larva makes 

 a mine on the underside of oak leaves. The species is synony 

 mous with the later described Lithocolletis intermedia Freyand 

 Boll. 



Lithocolletis argentifimbriella Clemens. 



One perfect type, Clemens' No. 18 ; alar exp., 7.5 mm. 



Bred specimens, compared with the type of this well known 

 species, are in U. S. National Museum. Lord Walsingham has 

 shown the synonymy with Chambers' Lithocolletis fuscocostella. 



Lithocolletis obscuricostella Clemens. 



One type, with right fore wing missing, otherwise in good 

 condition. Clemens' No. 19 ; alar exp., 6 mm. 



Clemens rightly gave weight (by italicising) to the peculiar colo 

 ration of the abdomen; but his description, " Black, tipped 

 freely with yellow," is unfortunate. He meant that the base of 

 the abdomen is black and the larger posterior portion is yellow. 

 The underside is silvery. I have seen no specimen exactly like 

 this type, but the species should be easiiy rediscovered through 

 knowledge of the food-plant Ostrya virginica. 



Chambers has himself* established the synonymy with his 

 L ith o collet is virgin iella . 



Lithocolletis ostryaefoliella Clemens. 



One type, with left fore wing missing and the other fore wing 

 somewhat crippled, is still recognizable and agrees with the 

 description. Clemens' No. 20; alar exp., 6 mm. I have no 

 specimen exactly like this type. The species is exceedingly near 

 to the foregoing species, which was bred from the same food- 

 plant, but the minute differences in the wing markings and the 

 color of the abdomen, pointed out by Clemens, are well substan 

 tiated by the types. 



Chambers suggested and Walsingham confirmed the synonymy 

 with Lithocolletis mirifica Frey and Boll. 



Lithocolletis lucetiella Clemens. 



One perfect type, Clemens' No. 21 ; alar exp., 7 mm. 



Bred specimens of this very distinct species, compared with 

 the type, are in the U. S. National Museum. Lord Walsingham 

 has established the synonymy with Lithocolletis cenigmatella 

 Frey and Boll. 



*Can. Ent., xi, p. 92, 1879. 



