new American Hymenoptera. oAU yi 
ferruginous. Superficially similar to WV. oregonica, but besides 
the characters just given differs as follows :—Yellow streak 
on lower anterior orbits longer ; sides of thorax with much 
less black ; mesothorax with only one black band; abdomen 
with only the sides of first segment showing black (this as in 
ultima) ; dorsal surface of abdomen bright, but not shining 
coppery red, except in certain lights, when it has a silvery or 
even purplish lustre (in oregonica it is shining and ordi- 
nary). ‘The head is transversely oval, as in N. oregonica. 
The abdomen in N. ultima has the same peculiar appear- 
ance as that of N. Astor?; it is possible that the latter is a 
variety of the former, but in my material JV. ultima is easily 
distinguished by the three black bands on mesothorax and 
the yellow spots of the abdomen. 
Hab. Corvallis, Oregon: 1 ¢, June; var. a, May 20, ?. 
Named after John Jacob Astor. Received from Mr. Viereck. 
The specimen taken in May is smaller and has three bands 
on mesothorax and the first segment of the abdomen black 
right across at base; the third antennal joint is even shorter 
than in the type, being less than half the length of fourth. 
The abdomen is quite without yellow spots. This looks like 
a distinct species, but I leave it with this mention for the 
present. 
Nomada corvallisensis, sp. n. 
? .—Length about 8 millim. 
Dark ferruginous, with black markings ; no yellow any- 
where. Mandibles simple. Resembles N. Astori, but 
certainly a different species, readily distinguished by having 
no yellow at lower corners of face; having the third antennal 
joint at least as long as the fourth; the sides of the dark red 
abdomen without black marks, and the surface of the abdomen 
very distinctly punctured, which is not at all the case in 
Astort. Maxillary palpi with the fourth joint longest, but 
the third almost as long; the fifth and sixth very slender, 
the fifth conspicuously shorter than the fourth and the sixth 
than the fifth. Face with short white hair; occiput with 
tawny hair ; scape black above apically ; front and region of 
ocelli suffusedly blackened ; mesothorax with a single broad 
median black stripe; scutellum and postscutellum dark red, 
but metathorax black ; tegule shining coppery red, with very 
sparse punctures. Wings fairly clear, the broadly darkened 
apical margin strongly contrasting ; stigma very dark reddish, 
nervures piceous ; second submarginal cell broad above. Legs 
red, with little black, but the middle femora at base and the 
