20 
Isosoma fitchi n. sp. 
Eurytoma hordei Fitch (nee Harris) Seventh Rept. Ins. New York (anthor's edi- 
tion), p. 154, 18G2. 
Female. — Length, 3 mm.; expanse, 5.8 mm. Head, pronotum, and 
mesonotum faintly shagreened, nearly smooth, shining; mesoscntellum 
with a few sparse punctures; metanotum with a complete median lon- 
gitudinal farrow einarginate on the anterior half and with a central 
carina extending nearly to tip; very coarsely rugulose either side of 
furrow with a faint granulation between raised lines; pronotal spot 
large, plainly seen from above and two spots together occupying about 
one-third of the dorsal aspect of the foreborder of the pronotnm. 
Antenna' with well separated joints; fnnicle joints 2, 3, 4, and 5 eqnal 
in length and width: joint 1 a little longer; joint 5 as well separated 
from club as from preceding joint: club a little longer than 4 and 5 
together but of the same width. Abdomen as long as thorax; joint 4 
shorter than (>; 5 longer than 6; 7 and 8 subequal. Color black, except 
for pronotal spot and knees, which are luteous: claw of stigmal club 
given otV about at tip of club, straight. 
Muh. — Length, 2.2 mm.; expanse, L2 mm. Petiole about as long as 
hind coxa- and nearly eqnal in length to first abdominal segment. 
Antenna' with fnnicle joints very slightly arched above, each joint fully 
three times as long as wide and slightly constricted in middle; other- 
wise as with /. hordei. 
Described from 2 females and 1 male in the Pitch collection, labeled 
in Fitch's handwriting" Eurytoma hordei Harris, Nos. 15223 and 15197. " 
Genus IS0S0M0RPHA Ashmead. 
Isosomorpha muhlenbergiae n. sp. 
Female — Length, 2.2 mm.; expanse, 4.8 mm. Thorax with close faint 
umbilicate-punctate sculpturing; metanotum with a straight central 
complete groove and a central carina indicated anteriorly — groove, how- 
ever, not einarginate: entire thorax with a close and very short white 
pile except in metanotal groove, which is naked. Abdomen shorter 
than thorax, flattened from sides; joint 1 very long, longer than all the 
rest together: joints 2 and 3 subequal; joints.") and <> very short; joints 
2.3,4, and 5 of antennal fnnicle, equal in length and width, subqu ad rate; 
joint 1 longer, twice as long as pedicel; club long, ovate, a little longer 
than fnnicle' joints 4 and 5 together. Color black; front coxa' dark 
brown, black at base: all legs honey-yellow; scape slightly yellowish 
at base; wings hyaline: stigmal club very small; claw feeble. 
Described from one female specimen reared from a gall on M allien - 
bergia diffusa, closely resembling deformation made by Isosoma hordei, 
and collected July 25, 1801, by J. Gr. Barlow, at Cadet, Mo. 
