17 
in the large pronotal spots. Metanotum with a distinct, strongly emar- 
ginate central longitudinal groove, the space either side finely granulate, 
with occasional irregular carinee. Abdomen longer than thorax; seg- 
ment 2as long as 3, 4, and 5 together; 5 and 6, subequal. Antenne 
rather long and straight; pilose; joint 1 of funicle only slightly longer 
than joint 2; club not quite as long as three preceding joints together, 
stronely flottened from side. Face very slightly pilose; metanotal 
fimbria sparse. 4 rhole insect is smaller, slenderer, and more deli- 
uppea n any except grande, form minutum. 
—Length, 1.9 mm; expanse, 3.4mm. Petiole short, not as long 
as first abdominal segment and scarcely as long as hind cox, scape of 
antenne slightly wiuened; funicle joints very slightly rounded above 
and very Slightly pedicellate; each more than twice as long as pedicel 
and each faintly constricted in middle; club divided into two pedicellate 
joints as with J. captivum. All legs black with light-yellow knees. 
IG. 7.—Isosomea tritict Fitch. 
Described from 11 females and 7 males reared by Mr. Albert Koebele, 
at Los Angeles, Cal., from Bromus ciliatus collected at Millard’s Canyon, 
Los Angeles County, Cal. Theadults issued in March, 1887, from grass 
collected September, 1886. 
Isosoma tritici Fitch (fig. 7). 
Lurytoma tritici Fitch, Jour. N. Y. State Agricultural Society, 1859, vol. x, p. 115. 
Tsosoma hordei Walsh, Amer. Entomologist and Botanist, Oct., 1870, vol. u, p.332. 
Decatoma basilaris Provancher, Faun. Ent. Can., vol. 11, p. 569. 
Isosoma nigrum Cook, Rural New Yorker, June, 1885, p. 314. 
Female.—Length, 4 mm.; expanse, 7.6 mm. Head, pronotum, and 
mesonotum strongly rugulose but not umbilicate-punctate except 
toward tip of scutellum, where an occasional umbilicate puncture 
occurs; metanotum also strongly rugulose with a faint trace anteriorly 
of a median longitudinal furrow; metanotal spiracles large and per- 
12284—No. 2 2 
and 
