46 THE CANADIAN ENTOMOLOGIST. 



Head and thorax gray, the front a Httle mixed with brown, the middle 

 of thorax with the usual glossy brown scales in the form of a longitudinal 

 crest ; abdomen gray, brown tinted, the sides at the base white, beneath a 

 little paler than above ; antennas strongly pectinate. 



Female. — Color and markings as in the male, the bands and veins a 

 little more decided in contrast of color with the wings. Thorax dark 

 leaden gray, patagiae rather lighter gray than the wings ; the entire absence 

 of white anywhere. 



This species is between Velleda and Laricis in size, as well as mark- 

 ings and colour. The antennae are strongly pectinate, more so than 

 Laricis, but not so much as Velleda. There is no decided white on 

 either sex, except on the sides of the abdomen of the male, the cross 

 bands and veins of the fore v/ings being whitish gray. The fringe of the 

 fore wing show a tendency to be paler at the ends of the veins, but they 

 are not pale externally, as are those of Velleda. 



Captured by Mr. David Bruce, in Colorado, and described from two 

 males in my cabinet, and one female in that of Mr. Bruce. 



Halisidota occidentalis, nov. spec. 



Expanse, 1.30 inches. 



Fore wings hyaline, except the anterior part to subcostal vein, the base, 

 and the posterior part along the submedian vein and a little above that at 

 the base. The costal space alternately four patches of yellow, between a 

 buff and a chrome yellow, and yellowish brown ; the posterior margin 

 alternately two spots each of the yellow and brown, the basal yellow and 

 the terminal brown spots the longest. From the costal brown spots three 

 irregular sub-hyaline brown bands extend across the wing, the two outer 

 connecting with the two brown spots on the posterior margin, the third 

 from the outer margin not reaching the margin but blended posteriorly 

 with the second ; the sub-basal brown spot on the costa is in line with a 

 red-brown spot on the median vein at base ; the subhyaline brown, is 

 darker than that on the costa. The hyaline spaces left between these 

 brown bands corresponds to the light bands in such species as Agassizii, 

 etc. Veins brownish yellow, as also the extreme outer portion of the wing. 

 Hind wings hyaline, immaculate ; fringes of both wings pale. 



Head pale yellowish brown, a yellow transverse stripe in front, antennae 



