78 bulletin 94. 
Momaila (Holonomada) pecosensis, (Cockerell). 
A ^ from Palisades, Colorado, May 7, 1901, from apple bloom, 
(C. P. Gillette collector). It differs from the 5 in having the 
pleura with a comparatively small yellow mark, and no yellow spot 
in front of anterior ocellus; the abdomen also is more inclined to 
be punctured. The species is the Rocky Mountain representative 
of N. edwardsii , from which it is easily known by the red color 
on the legs. Except as to the abdomen, the $ N. pecosensis agrees 
with the description of N. intercepta , Smith, from Vancouver I., 
which is evidently a Holonomada. 
tenada (Hdsnomada) vincta, Say. 
Perfectly genuine vincta , one of each sex, were taken by F. 
C. Bishopp, at Fort Collins, Colorado, September 4 and 12, 1903, 
from sunflowers. (Helianthus sp.) 
Nomada (Holonomada) lebrata, Cresson. 
A 5 collected by E. S. G. Titus at Fort Collins, July 28, 1900. 
When we consider N. zcbrata , vincta , rnorrisoni , etc., the distinc¬ 
tions between Holonomada and Xanthidium appear to completely 
break down. Holonomada might possibly be restricted to superba , 
edwardsii, pecosensis ,and their immediate allies; if this is not done, 
Xanthidium must I think be given up. 
Flomada elivilis, Cresson. 
Three ^s; Fort Collins, May 12, 1901, from plum blossoms* 
(E. S. G. Titus, collector) and one Denver, May 2, 1902. 
Nom&da (Xanthidium) rhodoxantha, new species. 
9 ; length about 10 mm., head and thorax ferruginous, strongly 
and closely punctured; scutellum prominent, bilobed; antennae long, en¬ 
tirely red, third joint much shorter than fourth, flagellum stout; labrum 
with a minute denticle; extreme lower corners of face yellow, but no yel¬ 
low on clypeus or mandibles; upper border of prothorax with a yellow 
stripe; tubercles and tegulae ferruginous, the latter strongly punctured; 
pleura with an obscure yellow spot posteriorly ;metathorax with a medi¬ 
an black band, on each side of which is a large area (including the sides 
of the enclosure) variegated with red and yellow; legs red, middle femora 
at base beneath, and hind femora largely blackish; wings clear with a 
brownish stain along the nervures, tips dusky; stigma bright ferrugin¬ 
ous, nervures brown; second submarginal cell broad above, third greatly 
narrowed above, its outer margin strongly angled; basal nervure a short 
distance basad of transverse medial; abdomen minutely rugulose, ferru¬ 
ginous, with broad entire yellow bands on all the segments, basal half 
of first segment black; venter ferruginous, marked with yellow. The 
mesothorax has a strongly marked median black band. 
One specimen, Colorado, without other locality label. 
This has the general appearance of N. rnorrisoni , luteoloides, etc. 
From luteoloides it is easily known by the ferruginous, densely punc¬ 
tured (minutely cancellate) scutellum. From rnorrisoni it differs by the 
much narrower mesothorax, with larger and much more distinct punc¬ 
tures; the shape of the third submarginal cell, etc. From placitensis it 
differs by the much longer fourth antennal joint, the absence of the con¬ 
spicuous brown hair on vertex and dorsum of thorax, etc. A form of 
