20 
Isosoma fitchi n. sp. 
Eurytoma hordei ¥itch (nee Harris) Seventh Rept. Ins. New York (author's edi- 
tion). p. 154, 1862. 
Female.—Length, 3 mm.; expanse, 5.8 mm. Head, pronotum, and 
mesonotum faintly shagreened, nearly smooth, shining; mesoscutellum 
with a few sparse punctures; metanotum with a complete median lon- 
gitudinal furrow emarginate on the anterior half and with » central 
carina extending nearly to tip; very coarsely rugulo 
furrow with a faint granulation between raised lines. 
large, plainly seen from above and two spots together « 
one-third of the dorsal aspect of the foreborder of © 
Antenne with well separated joints; funicle joints 2, 3, 4, and 9 equal . 
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 6; 5 longer than 6; 7 and 8 subequal. Color black, except 
for pronotal spot and knees, which are luteous; claw of stigmal club 
given off about at tip of club, straight. 
Male.—Length, 2.2 mm.; expanse, 4.2mm. Petiole about as long as 
hind cox and nearly equal in length to first abdominal segment. 
Antenne with funicle joints very slightly arched above, each joint fully 
three times as long as wide and slightly constricted in middle; other- 
wise as with J. hordei. 
Described from 2 females and 1 male in the Fiteh collection, labeled 
in Fiteh’s handwriting “ Hurytoma hordei Harris, Nos. 15223 and 15197.” 
Genus ISOSOMORPHA Ashmead. 
Isosomorpha muhlenbergie n. s). 
Female —Length, 2.2 mm.; expanse,4.8mm. Thorax with close faint 
umbilicate-punctate sculpturing; metanotum with a straight central 
complete groove and a central carina indicated anteriorly—groove, how- 
ever, not emarginate; 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 4 very long, longer than all the 
rest together; joints 2 and 3 subequal; joints 5 and 6 very short; joints 
2,3,4, and 5 of antennal funicle, equal in length and width, subquadrate ; 
joint 1 longer, twice as long as pedicel; club long, ovate, a little longer 
than funicle joints 4 and 5 together. Color black; front cox 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 AMuhlen- 
bergia diffusa, closely resembling deformation made by Isosoma hordet, 
and collected July 25, 1891, by J. G. Barlow, at Cadet, Mo. 
