124 Annals Entomological Society of America [ Vial. V5 
Head from above quadrate, temples somewhat narrower than the 
eyes, rather less than twice as broad as thick along the median line, 
surface dull black, finely shagreened. Ocelli small, lateral ones nearer to 
the median ocellus than to the eye margins. Antenne stout 19-jointed, 
the seventh and neighboring flagellar joints hardly longer than thick, 
color ferruginous to dusky with the apex piceous. Face below antennz 
short, with the distinct malar lines about a quarter as long as the face is 
wide at the lower angles of the eyes, mainly ferruginous but with a 
piceous spot on either side between the bases of the antennz and the 
malar line. Clypeal suture poorly defined. Mandibles ferruginous 
with piceous teeth. 
Thorax short and shining though finely shagreened and with a 
sparse pubescence. Mesothorax piceous, much shorter than the black 
‘““metathorax’’, usually with a poorly defined median furrow. Scutellum 
not indicated. ‘‘Metathorax’’ with a complete though not very 
prominent carina, and with a more definite median furrow than on the 
mesothorax. Legs not very long, rather densely pubescent, color 
variable from light dusky to piceous black, in the latter case the joints 
between the coxa and trochanter, and the trochanter and femora, are 
distinctly lighter than the remainder of the leg. 
Petiole piceous black, not very elongate, evenly expanded to the 
apex which is sometimes indefinitely ferruginous. Spiracular tubercles 
absent. Remainder of abdomen ovate, shining black, sometimes with 
apices of all segments slightly tinged with clear ferruginous, rather 
densely pubescent on the second and third, but more sparsely on the 
remaining segments. Ovipositor and sheaths piceous, about as long 
as the petiole. 
Observations. Described from two specimens taken by 
William M. Mann, at Stanford, Cal., on Nov. 23, 1909, and 
fan +5, VOLO. 
This species resembles Pezomachus obesus, Ashm. but 1s 
larger and stouter and has a very much shorter mesothorax. 
Type in the collection of the Bussey Institution, Harvard 
University. 
Pezomachus spiraculus sp. nov. 
Female. Length 2.6 mm. A small robust species, piceous black, 
except for the antennz, pro- and mesothorax, legs and petiole, which are 
dusky ferruginous. Petiolar spiracles abnormally prominent, placed on 
stout tubercles. ‘‘ Metathorax”’ carinate. 
Head from above not transverse, piceous and rather coarsely 
shagreened. Antenne 18-jointed, fuscous basally, piceous at the apex, 
short and stout, with the seventh and neighboring flagellar joints about 
one and a half times as long as thick. Face swollen below the insertion 
of the antenne, malar lines black, not quite half as long as the face is 
wide at the lower angles of the eyes, the inner margins of which diverge 
slightly below the insertion of the antenne. Clypeus normal. Man- 
dibles lighter in color than the rest of the face, with black teeth. 
