OF NORTH AMERICA. 37 



$ . $ . — Black and yellowish white. Palpi black. Head black, 

 with scattered, whitish scales on the front, vertex, and behind the eyes. 

 Prothorax and patagia black, with scattered whitish hairs. Prothorax 

 beneath, clothed with orange hairs, which color also extends between 

 the anterior pair of legs. Thorax and abdomen black, with deep, 

 blueish reflections, the latter ornamented with a very narrow, white, 

 stigmatal line. Legs black, with a few whitish scales about the tips of 

 the joints, tibial spurs of the posterior pair white. 



Wings black, with large, semi-diaphanous, yellowish white spots. 

 Anterior pair, with a large discal spot divided into three parts by the 

 black median vein and its fourth branch. Of these, the upper lies in 

 the discal area, terminating somewhat obliquely at the origin of the 

 first median nervule, and reaching rather more than halfway to the 

 base of the wing. The lower lies beneath the median vein, and is 

 bounded by the fold in the interspace; it extends nearly to the base of 

 the wing, and terminates on the fourth median nervule, midway be- 

 tween its origin and the outer margin of the wing. The middle spot 

 lies between the median vein and its fourth nervule, and is sharply an- 

 gulated outwardly. There is in addition, a broad, oblique, cur\'ed 

 transverse band across the nervules, neatly divided by the black nerv- 

 ules into four unequally oblong spots. Fringes black, very slightly 

 white at the apices. 



Secondaries with a large discal patch lying between the sub-costal 

 vein and the sub-median fold, and terminating outwardly, about half 

 way between the origin of the nervules and the outer margin of the 

 wing. Veins and nervules black. Fringes black, whitish at the apex 

 and anal angle. 



Expmtse of wings, 1.75 inches. Length of body, 0.70 inch. 



Habitat. — Colorado Territory. (Ridings and Mead.) 



Of the habits of this well marked species, I can learn but little, 

 except that, like its cogener, G. Hopfferi, it is abundant, though local. 

 The specimen from which the figure was drawn, was one of sixteen 

 which my friend, T. L. Mead, had in his net at the same time. These 

 were taken on one spot in a few minutes, and during the balance of a 

 season's collecting, he met but one other specimen. The original type 

 was collected by Mr. James Ridings. It has not occurred, so far as I 

 know, outside of the locality named. 



