350 



Hofmann, Deutsch, Pter. 48, 92, 1895. 



Fernald, Pter, N. A. 57, 1898 (in part). 



Id., Bull. 52 U. S. N. M. 447, 1902 (in part). 



Tutt, Ent. Rec. XVII, 35, 1905. Fixes type. 



Meyrick, Gen. Ins. C, 18, 1910 (in part). 



Id., Wagner's Lep. Cat. pars 17, 28, 1913 (in part). 



Barnes & McDunnough, Clieck List 151, 1917 (in part). 

 Mimacseoptilus Wallengren, Skand. Fjad. 17, 1859. 



Jordan, Ent. Mo. Mag. VI, 123, 1869. 



Tutt, Pter. Brit. 84, 1896. 

 tMimescoptilus Zeller, Stett. ent. Zeit. XXVIII, iiZ, ii7, 1867. 



Walsingham, Pter. Cal. Ore. 32, 1880. 



Meyrick, Trans. Ent. Soc. Lond. 11, 1886. 

 Adkinia Tutt, Ent. Rec. XVII, 37, 1905. Orthotype hipunctidactyla Haw. 



Front (in most of our species) with a rounded or conical prominence, not 

 conspicuously large, or a scale tuft. Ocelli present. Palpi various. Primaries 

 cleft one third or a little less ; Cu, beyond middle of cell, 3 near angle, R„ 

 and R^ stalked. Secondaries trifid, Cu„ before middle of cell, Cu^ near angle; 

 fringes never contain black scales. (See pi. XLVIII, fig. 9). 



While StcnoptiUa is structurally very close to Platyptilia, as 

 pointed out ijy Meyrick, it is not difficult to place our species prop- 

 erly. From the greater part of Platyptilia they differ in the complete 

 lack of dark scales or tufts in the fringes of the secondaries, and from 

 the remaining species in the very retreating anal angles of both lobes 

 of the primaries. The first lobe has this angle scarcely indicated in 

 five of the seven North American species. 



Key to the Species 



1. First lobe of primaries with a heavy black dash or conspicuous dark 



shade exdamationis 



With a slender pale dash pallistriga 



Without conspicuous marks 2 



2. Primaries tinged with yellow rliynchosiac 



Tawny, gray or brown 3 



3. Expanse under 17 mm. Abdomen with single dorsal dots or none. 



Somewhat tawny parvus 



Expanse over 17 mm. Dull gray or with paired dorsal dots, sometimes 

 small and difficult to observe 4 



4. Dull gray. Abdomen with or without a single dorsal dot mcngcli 



Generally grayish brown. Dorsal dots in pairs zophodactyla 



Brown, inner margin of primaries brightest. Dorsal dots paired but 

 faint pterodactyla 



