206 Mr. T. D. A. Cockerell on - 
transverse stains, not amounting to distinct black bands; 
mandibles simple ; flagellum entirely ferruginous ; third an- 
tennal joint not very much shorter than fourth ; head trans- 
versely oval; mesothorax very densely punctured ; tegule 
yellowish ferruginous, well punctured. Wings moderately 
smoky; stigma very dark ferruginous, nervures piceous. 
Scutellum not obviously bilobate ; abdomen practically im- 
punctate. 
Very similar to N. Sayz, Rob., of the Kastern States. 
¢ .—Length about 64 millim. 
Head and thorax black instead of ferruginous; antennz 
long, flagellum black above; narrow anterior margin of 
clypeus, lower corners of face, and mandibles except tips dull 
reddish yellow ; labrum the same colour, with the middle 
blackish ; tubercles with a reddish spot, but no other marks 
on thorax, which is quite hairy ; abdomen with a black mark 
on each side of second segment near base; yellow spots on 
sides of second, third, and fourth segments, and subdorsally 
on fifth and sixth; apex strongly emarginate; on the ventral 
surface basally is a large obcordate black patch. ‘The ante- 
rior and middle femora and tibiz have a very distinct black 
stripe behind, on the hind legs the black is more abundant 
and more suffused. 
Hab. Corvallis, Oregon: 5 9, May 21 to June 7; 1 @, 
April 27. 
Received from Mr. Viereck. 
Nomada ultima, sp. n. 
? .— Length 8 millim. 
Like WN. oregonica, but the third antennal joint is very 
much shorter than the fourth and the first abdominal seement 
above has black only at the sides of basal half, never in the 
middle. The anterior and middle femora and tibie are red, 
entirely without markings, but the hind femora have a black 
stripe behind. ‘The ventral surface of the abdomen is red, 
wholly without transverse blackish stains. Mandibles simple. 
Hab. Corvallis, Oregon: 6 ¢, May to June 7. 
Received from Mr. Viereck. 
Nomada Astori, sp. nu. (vel ultima, vay. ?). 
? .—Length about 73 millim. 
Red, with black markings; mandibles simple; abdomen 
without black bands or yellow spots; yellow at lower corners 
of face; third antennal joint half length of fourth; sides of 
abdomen inclined to be black-spotted. Antenna entirely 
