1864 REPORT OF THE CHIEF OF ENGINEERS. 



inwardly, and the second outwardly, with white; the sub-basal is almost straight, 

 the other curves inward a little near the costa ; a minute brown discal point or dot ; 

 exterior margin edged narrowly or with a mere line, rather, of brown ; fringe whitish. 

 Secondaries whitish with faint ochraceous tinge ; a minute discal point and a small 

 black mark on abdominal margin one-third in from the anal angle. 



Under surface whitish with an ochraceous tinge, the latter most perceptible at costa 

 and exterior margin of primaries ; dark lines and discal spots of upper surface repeated, 

 but fainter. 



One example of this handsome insect was taken July 14 at Pagosa Springs. 



Genus CIDAEIA Tr. 

 Cidaria Truncate,. 



Geometra Truncata, Hufnagel, Tabellen Berliner Magazin, iv, 602, 625 (1769). 

 Geometra Iiussata. Wiek. Verz. 113 (1776). 



Polyphasia Centumnotata, Stephens, Illustrations Brit. Ent. iii, 230 (1829). 

 Fetrophora Truncata, Packard. XJ, K. Geo. Sur. Terr. Harden, x (1876). 



Taken at various points along the route during the month of August. It is found 

 in British Columbia, in all parts of the United States, except the Southern States, as 

 well as in Europe and Siberia. 



Cidaria Hastata. 



Pfatlcena Hastata. Ltxxe. Systema Naturae, ed. x, p. 527 (1758) ; ed. xii. p. 870 (1767) ; Fauna 



Suecica, p. 335 (1761). 

 Mdanippe Gothicata, Guexee, Uranides et Phaleuites. ii, p. 388 (1857). 



One medium-sized example of this exceedingly variable species was taken ; it. has 

 less black on it than any example I have yet seen, either American or European. It is 

 likewise a species of large range, being found in Labrador and United States, Europe, 

 Siberia, and Alaska. 



Genus MARMOPTERYX Pack. 



Marmopteryx Foi'monata, n. sp. 



Female expands 1J inches ; head whitish gray, brown between the eyes ; thorax and 

 abdomen whitish gray; wings shaped much'as in Y r . Harmorata Pack., to which it is 

 allied. Upper surface pure satin white ; primaries with an exterior border of pale 

 grayish or fawn, very broad at costa and narrowing gradually to the inner angle; 

 within this border, near apex, is a white mark ; interior to the border, extending from 

 the costa to the median nervure, is a narrow shade of the same color as the border. 

 Secondaries immaculate, but the markings of under side faintly appear through them ; 

 all fringes pure white, alternated at veins with pale fawn. 



Under surface primaries pure silky white, yellow along costa and at apical parts ; 

 this yelloAV striated loosely on costa and densely at apex with scarlet ; within the 

 apical patch is a white mark corresponding to that within the fawn-colored exterior 

 margin of upper surface. Secondaries yellow, striated densely with scarlet ; a broad 

 pure white mesial band bent at nearly a right angle in the middle, in the space ex- 

 terior to this band directly opposite the angle formed by the bend in same is a yellow 

 and white space caused by the non-segregation of the stria? ; in the middle, about, of 

 the space between the base of wing and the mesial band is a large white spot ; the 

 striation from this spot to the abdominal margin and extending to the inner edge of 

 mesial band is blackish purple ; the costa near base has a conspicuous white mark ; 

 all fringes as on upper surface. 



The wings, especially the secondaries, are not near as much prolonged, especially as 

 in Marmorata Pack. The ornamentation is in the same style somewhat as in that spe- 

 cies, but the coloration, particularly on under side, is far more beautiful; this is 

 certainly the handsomest and most notable of the four species now known. 



Two examples were taken at the Rio Florida. 



COLEOPTERA. 



CABABIDJH. 



Genus CYMINDIS. 



Cymindis Brevipennis Zim. 



Pterostichus Protraetux Lee. 

 Plerostichm Luczotii Dej. 



PTEROSTICHUS. 



