132 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



ish. In these respects tliey seem to differ from Mr. Stainton's descrip- 

 tion of anduegiella and from Dr. Clemens's description of oreasella, wliicli 

 Mr. Stainton says is the same species; but I have little doubt they 

 belong to that species, though the absence of apple and thorn bushes, 

 on which anduegiella feeds, from that region, and the fact that these 

 specimens were found among oaks, might suggest a doubt. 



Gracilaria alnivorella Cham . (Cin. Quar. Jour. Sci., vol. ii, p. 298) ; G 

 alnicolella Cham. (Cin. Quar. Jour. Sci., vol. ii, p. 298). — Both species 

 feed in the larval state upon leaves of the black alder {Alniis sp.?) as far 

 up on the mountain-sides as those plants are found — over 10,000 feet. 



(t. acerifoliella Cham. (Cin. Quar. Jour. Sci., vol. ii, p. 299). — The larva 

 feeds upon the bush-maple up as high as the food-plant is found, say 

 nearly 10,000 feet. 



G. ^oxiulieUa Cham. (Cin. Quar. Jour. Sci., vol. ii, p. 301). — The larva 

 feeds on leaves of aspen up to over 10,000 feet altitude. 



G. negundelJa Cham. (Can. Ent., vol. viii, p. 18). — The larva feeds upon 

 leaves of the box-elder at Denver; altitude, 4,500 feet. Xo doubt, it will 

 be found in the states east of the plains. 



G. riheseUa Cham. — This species is known only in the larval condi- 

 tion. It folds the leaves of the red wil d currant so that the folded leaf 

 resembles exactly one folded by GelecMa ribesella, 



G. tliermopsella Cham. (Cin. Quar. Jour., loc. cit). — The larva mines 

 leaves of Thermo])sis montana. The mine is like that of G. (Parectopa) 

 rohiniella Clem., which the imago resembles. 



The relationship of this species to G. losquella Cham., G, (Parectopa) 

 roMniella Clem., and G. {Farectopa) lesjndegccfoliella Clem., affords a 

 parallel to that of Lithocolletis roMniella Clem., i. amijliicarpeceella 

 Cham., L. amornlusella Cham., and L. texa^ia Zell., mentioned on a 

 subsequent page. In each genus, four very closely allied species are 

 found feeding oa allied genera of Leguminosoi. The species of each 

 genus are closely allied, not only structurally and in ornamentation, but 

 in larval habits and the character of mines made by the larvae in the 

 leaves. The resemblance in ornamentation, however, is perhaps scarcely 

 so close between the four Gracilarim as between the four species of 

 Litliocolletis (vide post, LitJiocolletis amorplueella, &c.). 



Corisceumj sp. indet. — Fifteen mines and larvae of a species of this 

 genus were met with in Chej^enne Caiion, but all died after spinning 

 their cocoons. They were found upon a single bush of scrub-oak. The 

 mine is on the upper surface, and is a fao simile of that made by C. 

 albanotella Cham, on the tm^^er surface of white oaks in Kentucky. It 

 is, however, a different species, I think. 



Corisceum may be considered as a Gracilaria with tufted palpi. 



Ornix. — This genus is also very closely allied to Gracilaria, differing 

 from it mainly in its plainer colors and tufted vertex. 



