1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 465 



side piece is modifie<l toward tip into a long, slender, curved hook ; 

 three smaller corneous spurs of various shapes arise from the inner 

 side of the piece, the one nearest base longest. Expands 1.45 inches 



Habitat. — ^ew Brunswick. 



A single specimen, not perfect, from Mr. Thaster, marked July 27, 

 1871. The species is like suhjuncta in wing form, but lacks the line 

 crossing the median space. The genitalia ally it to atlantica, than 

 which it has narrower wings. The anal angle of primaries is distinctly 

 retracted. 



M olivacea Morr. 



This is perhaps our most variable species of the genus, hardly yield- 

 ing to vicina in this respect. The species is common and well known, 

 and extends from the Atlantic to the Pacific. From Mrs. Fernald we 

 have received a specimen which can hardly be specifically distinct, but 

 merits a varietal name, the more so as specimens from the White mount- 

 ains agree with it. I propose the name M.chscurior Smith, n. var. It 

 is very even dark gray, with a green suffusion, and lacks all contrasts of 

 color so prominent in the type form. The lines are velvety black, and 

 there is a red shade on the t. p. line inferiorly. The ordinary spots are 

 as in the type. 



I have at different times seen specimens of this form, unnamed in col- 

 lections, and it is to call attention to its connection with olivacea that a 

 name is proposed. 



M. rectilinea Smith, sp. nov. 



Primaries dark fuscous brown, with a deep crimson brown shading, 

 which is variably distinct, and a mossy green shade over all. T. a. line 

 geminate, with a wide, rather irregular outward curve. T. p. line gemi- 

 nate, angulate on costa, then rigidly oblique to hind margin. Basal 

 line distinct. S. t. line pale, rarely distinct; its course sinuate. Usu- 

 ally it is more or less lost in the powdery irroration of the outer portion 

 of the wing. Ordinary spots essentially as in olivacea; but the reni- 

 form is not so contrasting. Secondaries varying from fuscous to black- 

 ish, paler toward base. Beneath dark gray, powdery, with variably 

 distinct outer line and discal dot. Head and thorax concolorous with 

 primaries; pategi?e sometimes with white disc. Expands 1-1.10 inches 

 (25-28°^™). 



Habitat. — California, Vancouver, Oregon, California. 



Essentially like olivacea^ from which it differs primarily in the very 

 evenly oblique t. p. line, and more irregular t. a. line. The maculation 

 is more powdery, and there is no contrast in color ; there is usually a 

 prominent paler patch in the s. t. space near the hind angle, which forms 

 an obvious feature in the appearance of the insects. The abdomen of 

 the $ exceeds the secondaries and is rather prominently tufted. Sev- 

 eral specimens of each sex, coll. div. It is barely possible that this is a 

 ■ Proc, X. M. 87 30 



