new American Ilymenoptera. 203 
Nomadide. 
Nomada erythrochroa, sp. n. 
2? .—Length about 83 millim. 
Rather light orange-ferruginous, without black or yellow 
markings; abdomen rather elongated, subfusiform, very 
minutely yet distinctly punctured. Distinguished from the 
allied species by the following combination of characters :— 
Mandibles simple; third joint of antenne shorter than 
fourth, but more than half its length; flagellum wholly ferru- 
ginous ; mesothorax dull, the punctures as close as is possible ; 
scutellum prominent, conspicuously bilobed. Wings smoky, 
with the usual light spot ; stigma dark ferruginous; nervures 
piceous ; second submarginal cell very broad above; third 
submarginal cell greatly narrowed above, less than half width 
of second on marginal nervure. Tegule large, ferruginous, 
punctured. Sides of metathorax with conspicuous white 
hair. 
Hab. Pasco, Washington State, May 25, 1896 (Trevor 
Kincaid). 
Nomada Grayi, sp. n. 
? .—Length about 9 millim. 
Similar in form and colour to N. erythrochroa, but a little 
duller, with the front, region of ocelli, sides of prothorax, 
median stripe cn mesothorax, large hourglass-shaped mark 
on metathorax, very broad band trom wings to middle and 
hind coxe, all the coxe behind except at apex, spot at extreme 
base of first four femora beneath, posterior part of cheeks, 
and extreme base of first abdominal segment all black. The 
only yellow about the insect is a rather large spot on each 
side of the second abdominal segment. Mandibles bidentate. 
Third antennal joint as long as fourth or nearly so; antenna 
whoily ferruginous. Wings fairly clear, the apex dusky ; 
stigma dark ferruginous, nervures piceous, second submar- 
ginal cell little narrowed above. Cheeks and sides of meta- 
thorax with conspicuous white hair. Tegule light amber- 
colour. 
Hab. Corvallis, Oregon, May 7, 1898. 
Received from Mr. H. L. Viereck. Named after Capt. 
Robert Gray, the explorer. 
Nomada Clarkit, sp. n. 
? .—Length about 94 millim. 
Form ordinary, with oval abdomen, which is extremely 
