36 WILLIAM G. DIETZ, M. D. 



GROUP I. 



The two species belonging to this group are distinguished as fol- 

 lows : 



Larger, 22.0 mm. Forewings with two entire fascias oregonella. 



Smaller, 14.0 mm. Forewings with one entire fascia rusticella. 



I. ©regonella Wish. — Dyar's List, p. 569, No. 6486. — Head orange-yellow, 

 very rough above, smooth in front. Antennae of male pubescent, scarcely one- 

 half the length of forewing, annulated with white and fuscous. Forewings 

 brown, with two fascias and a costal spot white, a fascia at the basal fourth, point- 

 ing obliquely inwardly from the costa and wider on the dorsal margin ; another 

 fascia slightly beyond the middle, which appears to consist of two elongate trian- 

 gular spots, one on the costal and one on the dorsal margin, joined on the middle 

 of the wing by a narrow streak running inwards and upwards and connecting 

 the apex of the dorsal spot with that of the costal. Halfway between the fascia 

 and the apex is a small elongate white costal spot, the cilia are also white, except 

 at the angle where they are brown. Hindwings grayish ochreous. 



Exp. 22.0 mm. 



Hab. — Oregon (Canyon City on John Day's River). 



Bred by the author from a larva boring into the stem of a spe- 

 cies of Saxifrage. Thus far, only the type, a male, in his Lord- 

 ship's collection, is known. 



I. russatella Clem.— Dyar's List, p. 569, No. 6484. — Head ochreous yellow, 

 palpi and basal part of antennae pale yellow. Labial palpi ascending, third joint 

 somewhat flattened and nearly as long as the second. Antennae iucrassate to- 

 wards the base, joints not close set, bipectinate ( % ) or finely pubescent ( 9 )• 

 Thorax golden brown, with some lustre. Abdomen dark fuscous brown. Fore- 

 wings deep golden brown, with purple lustre in some lights; a yellowish white 

 fascia commencing at one-third of costa, pointing obliquely backwards to and 

 becoming wider towards the dorsal margin which it reaches at one-fourth; a 

 large triangular costal spot beyond the middle and a similar one opposite to but 

 a little further from the base, on the dorsal margin, of the same color. Cilia 

 whitish around the apex, becoming brownish towards the posterior angle. Hind- 

 wings as wide as the forewings, oval, purplish brown, scales orbiculoidal ; cilia 

 short, concolorous, paler towards the outer edge. Underside of wings brownish 

 fuscous, with feeble purple reflection. Legs grayish white, anterior more or less 

 fuscous, tarsi annulate with pale. Abdomen beneath pale yellow. 



Exp. 12.0-14.0 mm. ; 0.48-0.56 inch. 



Hab. — New York (Ithaca); Canada (Montreal . 



Three specimens in my collection. Lord Walsingham who saw 

 the type — no longer existing — in the Academy of Natural Sciences, 

 Philadelphia, in 1872, recognized this species as his Lampronia tri- 

 punctella. The small costal spot between the large costal spot and 

 the apex is wanting in two and present in one of my specimens; the 

 fascia near the base is figured as equidistant on both margins, 



