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Habitus of Tccyiiocampa or Perigrapha. From both it differs 

 in the wing form, and this is the basis of the genus, which otherwise 

 agrees fairly well with Tccniocampa, save in the thoracic crest. 

 Perigrapha, which has this crest, has also a different wing form, and 

 has the antennie uniformly pectinated and longer than in the present 

 genus. 



Two species referable to the foregoing generic characterization 

 are before me, agreeing in maculation to a remarkable extent, but 

 differing in antennal structure very decidedly. 



Angiilata is a creamy-gray species in which the male antennae 

 are serrate and bristled — "brush like." 



Fiilminans is a larger, reddish form, in which the male antennee 

 are rather lengthily bi-pectinated. It is from Colorado, while angii- 

 lata is from California. 



Perigonica angulata sp. nov. — Creamy or luteous gray; head and thorax 

 immaculate. Primaries with basal line evident, geminate; t. a. line geminate, 

 outcurved, somewhat irregular and interrupted. T. p. line sinuate, inner 

 line narrow, somewhat lunulate, followed by two series of venular dots. S. t. 

 line narrow, pale, hardly distinct, nearly parallel with outer margin. A row 

 of not quite terminal black dots. A distinct median shade band from costa 

 between ordinary spots, outwardly oblique and invading the lower part of 

 reniform, there angulate, and then parallel with and close to t. p. line to inner 

 margin. Orbicular concolorous, moderate in size, round, vaguely defined by 

 a slightly paler annulus. Reniform narrow, upright, somewhat constricted 

 centrally, pale margined, inferiorly dark filled. These markings vary in the 

 direction of obsolescence, one specimen before me being nearly immaculate 

 and showing only tracings of the described maculation. Secon'daries whitish, 

 with a blackish outer marginal line and a distinct discal spot. Beneath pow- 

 dery, with a black, complete, common outer line, and a black discal spot on 

 all wings. Expands 1.48 inches; 37 mm. 



Hab. — Sierra Nevada, Cal. 



Both sexes from Mr. Henry Edwards. The variation is in the 

 direction of obsolescence of maculation in the specimens before me: 

 the peculiar double series of venular dots beyond t. p. line and the 

 inception at costa of the median shade being the most permanent 

 features. 



Perigonica falminans sp. nov. — Somewhat luteous brick-red, very even in 

 color. Head and thorax immaculate. Primaries with ajl the maculation 

 faint, scarcely legible. Basal line traceable, geminate. T. a. line single, 

 narrow, dusky, outwardly curved. T. p. line geminate, siiuiate, outer line a 

 series of venular dots. S. t. line rather distinct, slightly irregular, pale, as a 

 whole about parallel with the outer margin. A narrow median shade line 

 from costa between the ordinary spots, outwardly oblitjue to and darkening 

 the lower part of reniform, there angulated and then parallel with and close 



