126 Annals Entomological Society of America [Vol. V, 
ruginous color except for a narrow median piceous line; remainder of 
thorax piceous. Scutellum and wings well developed. ‘‘Metathorax”’ 
rather coarsely shagreened with a well defined semi-circular carina. 
Legs, including coxze dusky luteous. 
Abdominal petiole long and slender, but little expanded at the 
apex; spiracles prominent; piceous, with a definite yellow apical band. 
Remainder of abdomen slender, second segment with a broad apical 
yellow band, third segment with or without a definite apical band. 
Remaining segments entirely piceous and more shining. Surface sha- 
greened, with a rather long pubescence. Claspers small. 
Female. Length 4.5 mm. Yellow ferruginous except for narrow 
indefinite basal bands on the abdominal segments. 
Head from above somewhat transverse, ferruginous, but more 
yellowish round the eye margins. Antenne (broken) long and slender, 
the scape and first three flagellar segments are luteous. Face below 
antennz swollen medially. Malar lines distinct, about one-third as 
long as the face is wide at the lower angles of the eyes; mandibles 
yellowish with piceous teeth, palpi yellow. 
Thorax yellow ferruginous evenly shagreened, about 214 times as 
long as wide. Mesothorax with an obsolete median furrow and no indi- 
cation of a scutellum. ‘‘Metathorax’’ somewhat gibbose with a del- 
icate but complete carina, which is most definite laterally. Legs dusky 
luteous. 
Abdominal petiole with rather prominent spiracles, apex almost 
three times as wide as the base, surface finely shagreened, color fer- 
ruginous, more yellow at apex. Remainder of abdomen oval, segments 
piceous at the base merging through ferruginous to honey-yellow at 
the apex, clothed with a moderately sparse pubescence. Ovipositor 
elongate luteous, sheaths dusky at the apex. 
The @ is much like that of micarie How. but is lighter in color and 
has more prominent petiolar spiracles. 
Type of #, and 9 from which this description is drawn, in 
National Museum. 
Pezomachus pennsylvanicus sp. nov. 
Female. Length 2.5 mm. A small, slender, fuscous species, with 
a very short and broad petiole. Antenne rather long and slender. 
Ovipositor as long as the petiole. 
Head from above rather globose though the occiput is excavated. 
Surface coarsely rugose. Ocelli small.. Face rather broad, malar 
line distinct, about one-third as long as the face is wide. Antenne 
21-jointed; seventh and neighboring flagellar joints about 11% times as 
long as wide. Color fuscous throughout. Clypeus not very well defined. 
All mouth parts colored as the rest of the head, but mandibular teeth 
rather more piceous. 
Thorax uniformly fuscous, nodes sub-equal. Mesothoracic tegule 
prominent. No indication of a scutellum. ‘‘Metathoracic” carina 
poorly defined, but the somewhat gibbous metathorax is abruptly 
declivous behind its situation. Legs uniformly rufous brown. 
