128 Annals Entomological Society of America [Vol. V, 
sparse pubescence. The scutellum is large. ‘‘Metathorax”’ rather 
small and flat with a well defined roughly semicircular carina, and 
rather prominent straight lateral carinze. Wings well developed. Legs 
long and slender, ferruginous. 
Abdomen elongate and slender. Petiole and segments 2 and 3 and 
sometimes part of segment 4 luteus; remainder piceous. Surface sha- 
greened, with rather a dense pubescence. Petiole long and slender, but 
little dilated at the apex which is only about 11% times as wide as the 
base, spiracles rather prominent. Genital claspers small. 
Types in the National Museum. 
Described from 4 2 and 5 @& bred from egg capsules of 
Algalena nevia taken at Twining, Maryland, issued Feb. 14 and 
15th. 
The females are much like those of P. flavocinctus Ashm. but 
have less pubescent abdomens and only 25 joints to the antenne. 
Pezomachus nodosus sp. nov. 
Female, length 5 mm. Color ferruginous with metathoracic disc, 
base of the third abdominal segment, the whole of the fourth and 
remaining segments piceous. ‘‘Metathoracic”’ carina complete, not 
prominent. 
Head from above about twice as wide as thick along the median 
line, surface finely shagreened, occiput rather deeply excavated. Ocelli 
small, lateral ones about equidistant from the median ocellus and the 
eye margins. Antenne long and slender, at least 21-jointed (broken) 
rather more dusky in color than the rest of the head. Seventh and 
neighboring flagellar joints about 21% times as long as wide. Face not 
transverse, cheeks rather swollen; malar line distinct, about one-third as 
long as the face is wide between lower angles of the eyes. Clypeal 
suture not very definite. Mandibles ferruginous with piceous teeth. 
Palpi long and ferruginous. 
Thorax rather coarsely shagreened, with a sparse pubescence. 
Mesothorax elongate, with a broad shallow median furrow and a vaguely 
defined scutellum. ‘‘Metathorax”’ gibbose, declivous both anteriorly 
and posteriorly, rather more piceous than the mesothorax on the disc. 
Carina complete but not very prominent. Legs long and rather fuscous. 
Petiole not very elongate, about three times as wide at the apex as 
at the base, spiracles sub-prominent. Remainder of abdomen ovate. 
Second segment rather yellow-ferruginous at apex, third piceous at 
base. The remaining segments and ovipositor sheaths are piceous. The 
entire surface of the abdomen is shining, obsoletely shagreened and 
with a sparse pubescence. 
Observations. Described from a single specimen taken at 
Lawrence, Kansas, by Hugo Kahl, on June 19th, 1896. It some- 
what resembles P. ottawaensis, Harrington in color and the form 
of the carina, but is much more binodose. 
Type in the National Museum. 
