434 Wisconsin Academy of Sciences, Arts, and Letters . 
“The outer ramus of the fifth pair of feet in the female 
three-segmented, the third segment small hut distinct and hear¬ 
ing two small spines. The basal segment hears a short, thick 
spine at its outer distal angle. The unguiform process of the 
second segment of this ramus is rather arcuate, denticulate 
within and roughened on the outer margin. In addition to 
the two spines on the third segment, this segment has a mi¬ 
nute spine. The inner ramus is simple and almost equal to 
the first segment of the outer ramus, is ciliated at the apex, 
and hears two long equal spines. 
“Right fifth foot of male rather robust. The basal segment 
is provided with a small spinous process near its inner prox¬ 
imal angle. Second segment of the outer ramus short, being 
about one and one-fourth times as long as broad, and bearing 
the marginal spine at the distal angle. Terminal hook long, 
usually sigmoid, very minutely denticulate on the inner mar¬ 
gin and tapering toward the apex. Inner ramus narrow and 
barely reaching the middle of the second segment of outer 
ramus, one-segmented and ciliate at tip. The second seg¬ 
ment of the left male fifth foot is triangular, and ends in a 
short, obtuse process. The inner side is expanded, ciliated, 
and a strong, sharp spine projects a little below the middle of 
this margin. The inner ramus is simple, slender, and ciliated 
at the tip. 
“Length of female, 2.16 mm. Length of male, 1.60 mm. 
“This species resembles D. franciscanus Lillj. and D. sic- 
ilis Eorbes. It differs from the former in the armature of the 
male antenna and the form of the male fifth feet, From the 
latter it differs in the structure of the female fifth feet, the 
size and the shape of the male fifth foot. Both these species 
have two-jointed inner rami in the male fifth foot, while in D . 
Wardi they are simple. 
“The specimens upon which this description is based were 
from the collections of Prof. H. B. Ward, for whom the 
species is named, and were collected by Edward Butler at 
Spokane, Washington.” 
While this paper was going through the press, the publica¬ 
tion of Mr. Pearse, containing the above description, was re- 
