1912] The Pezomachint of North America 127 
Petiole rather yellow at the apex, short, about 114 times as long as 
broad at the apex. Base broad, but not half the width at the spiracle, 
beyond which the petiole widens but little. The spiracles are not very 
prominent. Remainder of the abdomen elongate oval, uniformly brown 
with a sparse short pubescence. Ovipositor as long as, or slightly longer 
than, the petiole. The surface of the abdomen, including the petiole, 
is shining and only shallowly shagreened. 
Observations. Described from a single bred specimen col- 
lected by Kirby and Champlain at N. Cumberland, Pa.,11-27-’09 
Pezomachus similis sp. nov. 
The female measures about 4 mm., stout, ferruginous except for 
apical half of the abdomen which is shining piceous. ‘‘ Metathoracic”’ 
carina indistinct, though apophyses are prominent. Abdominal 
pubescence sparse. 
The male measures about 5 mm. long and slender, fully winged in 
all specimens seen. The head thorax and legs ferruginous as in 9, but 
the petiole and at least the second and third abdominal segments are 
luteus, remaining segments piceous as in 2. Metathoracic carina dis- 
tinct, semi-circular. Abdominal pubescence rather dense. 
Female. Length 4—-4.5mm. Head from above ferruginous and finely 
shagreened; about twice as wide as thick along the median line. The 
margined occiput is not very deeply excavated. Ocelli small and rather 
far apart, the lateral ones are about as far from the median as from the 
eye margins. Antenne long and slender, entirely ferruginous, 25-jointed. 
Face rather transverse, malar line not very distinct, about one-third as 
long as the face is wide at the lower angles of the eye margins. Clypeus 
transverse, mandibles rather flavous at the base, with two shining 
rufous apical teeth. Palpi ferruginous. 
The thoracic nodes are sub-equal, the surfaces are shagreened and 
sparsely pubescent. Mesothorax with a distinct median groove. Scu- 
tellum indicated by a small rounded tubercle. ‘‘Metathorax’’ rather 
gibbose, the carina is poorly defined medially, but the apophyses are 
distinct and appear as two short horizontal lines. Legs long, dusky- 
ferruginous. 
Petiole and second abdominal segment ferruginous, the remaining 
segments are piceous. The entire surface is finely shagreened and 
shiny, with a sparse short pubescence. The petiole is about 31% times as 
broad at the apex as at the base. Spiracles sub-prominent. Ovipositor 
ferruginous. Sheaths piceous except at the base where they are yellowish. 
Male. Length 5mm. Head from above transverse, about 2% times 
as wide as thick along the median line. Ocelli very large. The occiput is 
not very deeply excavated. The antenne are slender and as long as the 
body, about 28-jointed. Face similar to that of the Q@ but the clypeus 
is deeper and therefore less transverse. 
Thorax entirely ferruginous. The mesothorax is well developed 
with distinct parapsidal grooves on its apical half, which slightly con- 
verge caudad. The surface is finely shagreened with a short, not very 
