14 
rugose; flagelluni of antenme long; pedicel not globose, slightly elon- 
gate; joint 1 of funicle longest, twice as long as pedicel; joints 2, 3, 4, 
and 5, each a little shorter than its preceding joint; not so strongly 
pedicellate as with I. californicum and I. bromi, moderately arched 
above with the hairs arranged in two indefinite whorls; club separated 
into two subequal pedicellate joints^ giving tunicle the appearance of 
being 6-jointed instead of 5-jointed, as with bromi and californicum; 
scape short, about as long as pedicel and flrst funicle joint together; 
strongly expanded below tip. Coloration like that of female. 
Described from 17 females and 12 males captured by Prof. F. M. 
Webster, in May, 1885-86, at Normal, 111., and Lafayette, IncL, on blue 
grass. 
Isosoma elymi French (tig. 4). 
Isosoma elymi French, Canadian Kntomologist, vol. XIV, p. 9, 1882. 
Female. — Length, 3.8 mm; expanse. 7 mm. Head and mesonotum deli- 
cately shagreen ed, not rugulose; metanotum with a central longitudi- 
Fig. 4. — Isosoma elymi French. 
nal furrow, rather broad and shallow and transversely striate; each 
side of the posterior two-thirds of the groove is a broad, flat space, 
closely and finely granulate; above this space is a coarsely rugulose 
area; pronotal spot very large and conspicuous, occupying one-half of 
the dorsal aspect of the anterior border of the pronotum. Entire body 
rather closely but finely pilose. Antenna' unusually hairy; joint 1 of 
funicle nearly twice as long as joint 2, which is about the same length 
as pedicel; joints 3, 4, and 5 about equal to 2; club as long as three 
preceding joints together. Abdomen as long as thorax; joint 2 as long 
as 3, 4, and 5 together; joints 4 and 5 subequal, 6 and 7 a little longer. 
Scape and legs black; apical one-third of anterior femora, front tibiae, 
all tarsi, and knees of middle and hind legs, honey-yellow ; the prono- 
tal spot lighter yellow; claw of stigmal club given off just before the 
