132 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



jsh. In these respects they seem to differ from Mr. Stainton's descrip- 

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

 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. (Cm. 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 (Abuts spJ) as far 

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



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

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



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

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

 be found in the states east of the plains. 



G. ribesella 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 GelecJiia ribesella. 



G. tJwrmopsella Cham. (Cin. Quar. Jour., loe. cit). — The larva mines 

 leaves of TJiermopsis montana. The mine is like that of G. (Parectopa) 

 rdbiniella Clem., which the imago resembles. 



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

 rohiniella Clem., and G. (Parectopa) lespidegwfoliella Clem., affords a 

 parallel to that of LitJiocolletis rohiniella Clem., L. ampJiicarpeacUa 

 Cham., L. amorpluvella Cham., and L. texana Zell., mentioned on a 

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

 found feeding on allied genera of Leguminosw. 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 larva? in the 

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

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

 LitJiocolletis (vide post, LitJiocolletis amorphwella, &c). 



Corisceum, sp. bidet. — Fifteen mines and larva? of a species of this 

 genus were met with in Cheyenne Canon, 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 lac simile of that made by C. 

 albanotella Cham, on the under 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. 



