1912] The Pezomachint of North America 123 
somewhat constricted immediately behind these; the entire surface is 
finely and evenly punctured. The remainder of the abdomen is oval, 
finely and evenly punctured with a short but rather dense pubescence. 
Segments 2 and 3 are sub-equal in length and sharply contrasted in 
color with the remaining black segments. The ovipositor and sheaths 
are piceous. 
Observations. Described from a single 2 specimen taken 
in Colorado. Type in the National Museum. 
Pezomachus longipes sp. nov. 
Female. Length4.5mm. Piceous black, densely pubescent, species. 
Legs very long and slender. 
Head from above about twice as wide as thick along the median 
line, piceous, surface shagreened, not shining, ocelli very small. Antennz 
piceous throughout, slender but rather short, 23-jointed, the 7th and 
neighboring flagellar joints not quite twice as long as thick. Face 
below antennz somewhat swollen, piceo-ferruginous, clothed with a 
rather long pubescence, especially on the clypeus. Clypeal suture 
obsolete. Malar lines distinct, about half as long as the face is wide at 
the lower angles of the eyes. Cheeks not swollen. 
Thorax piceous black, uniformly shagreened, about three times as 
long as wide, nodes sub-equal. Mesothorax densely pubescent, tegule 
small but prominent, no indication of a scutellum. ‘‘Metathorax”’ 
more sparsely pubescent and more shining than the mesothorax. The 
carina is sinuous and poorly defined medially. Legs long and slender, 
the hind femora reaching almost to the apex of the abdomen, piceous 
black and clothed with a dense short pubescence. 
Petiole piceous black with an indefinite and variable ferruginous 
apical band, densely pubescent, evenly widened from the base to the 
apex, spiracles not prominent. Remainder of abdomen ovate, black, 
sub-shining though closely punctate and clothed with a dense short 
pubescence. Ovipositor and sheaths black, somewhat longer than 
the petiole. 
Observations. Described from two specimens taken at 
stanford University, California, by William M. Mann, Feb., 
1910, and Harold Morrison, Dec., 1910. This species resembles 
P. cockerelli Brues but is readily separated by the presence of 
the metathoracic carina. 
Type in the collection of the Bussey Institution, Harvard 
University. 
Pezomachus stanfordensis sp. nov. 
Female. Length 4mm. Shining black, antenne, legs, mesothorax 
and extreme apex of petiole usually lighter in color. Abdomen witha 
rather dense pubescence. ‘“‘Metathorax’”’ and usually mesothorax 
also, with an obsolete median furrow. 
