244 Wisconsin Academy of Sciences, Arts, and Letters. 
only, the black separating the spots being broader an¬ 
teriorly and posteriorly than midway. The band on the 
fifth segment smaller and not quite reaching the lateral 
margins, distinctly interrupted; hypopygium yellow; 
there is a small posterior, median, elongated, slightly red¬ 
dish spot on the second segment. Pile on scutellum black 
on disk, yellow and longer on the margin; that of abdomen 
yellow or black according to ground color. Legs black 
with the following parts yellowish or reddish: extreme 
base and pre-apical spot of hind femora, base and a me¬ 
dian ring on the hind tibiae; tips of the four anterior fe¬ 
mora, base of front tibiae, middle tibiae, and first two 
joints of mid-tarsi. Pile underneath the hind tarsi dis¬ 
tinctly ferruginous. Sixth vein only slightly sinuate. 
Female: Similar with the following exceptions: Front 
with black of vertex connecting with the shining spot at 
base of antennae; facial stripe scarcely reaching base of 
antennae. Abdominal spots a trifle smaller, fifth segment 
with spots similar to those on the fourth, no posterior spot 
on second segment. In one female the first segment is 
entirely black. 
104. H. bruesi Graenicher. Vilas County. One female. Figure 
73. Described in Bull. Wis. Nat. Hist. Soc. 8: 40. 1910. 
105. H . laetus Loew. Dane, Milwaukee, Washington, Fond du 
Lac, Eau Claire, Pierce, and Douglas Counties. Common 
June to September. 
106. H. chrysostomus Wied. Dane, Milwaukee, and Washington 
Counties. Late June to early September. Figures 74, 75. 
The male is easily told by the spur on the hind coxae, 
the female has only a slight indication of this spur but it 
is evident enough to distinguish the species after a little 
practice. Female is easily separated from the female of 
bilinearis by the pollinose bands on the third and fourth 
segments which reach the side margins. The legs of 
chrysostomus —female—are darker and the abdomen is 
slightly constricted about the middle of the second seg¬ 
ment, making the species easily distinguishable from the 
same sex of lunulatus. In fact, the constriction of the 
abdomen is characteristic of this species and separates it 
from other members of this genus occurring in Wisconsin. 
107. H. bilinearis Will. Milwaukee and Dane Counties. Figures 
76, 77. Caught only in May or June. 
