146 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



RemarJcs. — This species, Mamathiana^ ciniflonella^ and a few mis- 

 cellaneous unnamed specimens form a very complex group in which the 

 species are exceedingly difficult to separate. On genitalia it is difficult 

 to separate one from the other, only one specimen, an unnamed unique 

 female from the Moscow Mountains, Idaho, showing good specific 

 characters in the genitalia. The harpes of sciadopa are clothed with 

 seemingly finer hairs than those found in Jdaviathiana or cinifionella^ 

 but this character, even though probably sufficient to distinguish 

 sciadopa from the others, fails in separating the latter two. The point 

 of origin of the transverse arm of the clasper and the comparative 

 lengths seem to be the safest characters for separating the males of 

 the two species. The length of the wings of cinifioneUa is proportion- 

 ately greater than in klamathiana, but I am skeptical of the value of 

 this character. In some long reared series of other species both long- 

 and short-winged forms are found. In some specimens the lengthen- 

 ing of the wings seems to be retarded. The venation shows some vari- 

 ation in all species, thus eliminating venation as a means of specific 

 separation. 



On pattern and size it is possible, with exceptions, to distinguish the 

 three; sciadopa may be separated from the other two by its much 

 smaller size, grayer appearance, and total absence of brown or red 

 scales. Under this name I place with some doubt the specimens listed 

 above. Meyrick's description of sciadopa could actually fit any one of 

 two or three species before me, but because of the type locality and the 

 fact that Meyrick has placed sciadopa in the '■'■cini-fionella group." I 

 prefer to use his name instead of proposing another. An examination 

 of the type will be necessary to determine definitely what the name 

 really represents. 



3. BIBARRAMBLA, new genus 

 PL.VTE 4, FiGTTRES 29, 30 ; Plate 9, Figxtbes 65, 65a ; Plate 18, Figube 109 



Genotype. — Semioscopis alleneUa Walsingham, Trans. Amer. Ent. 

 Soc, vol. 10, p. 174, 1882. 



Similar to Agonopterix but the second segment of the labial palpus 

 without furrow ; socii and uncus fused to form hood. 



Head with appressed scales; side tufts spreading; antenna simple 

 in both sexes ; basal segment short, with pecten. Labial palpus long, 

 recurved, second segment much longer than third, without furrow. 

 Thorax with two minute crests. Abdomen not flattened. Fore wing 

 with arched costa ; scale tufts present ; 12 veins ; 2 and 3 stalked from 

 angle; 2 and 3, 4 and 5 closely approximate; 7 and 8 stalked, both to 

 costa; stalk of 7 and 8 approximate to 9; 11 from well before middle; 

 termen straight, oblique. 



Hind wing as broad as fore wing ; 8 veins ; 3 and 4 connate ; 6 and 7 

 subparallel. 



