1885. ] Entomology. ee 805 
Illinois and south—J/sosoma tritici; yet from the brief description 
I think it far more likely that /sosoma_ nigrum is the insect which 
is doing the damage in New York. The farmers in Wayne and 
Washtenaw counties are not sure that the damage was very great, 
but all reported the wheat yield below their expectations. Pro- 
fessor Lintner estimated the loss in. New York to be from sixty 
to seventy-five per cent in such stalks as were attacked, 
` Tsosoma nigrum sp.—Female (Fig. 2): ren of body 4.4™"; expanse oi 
wing 6.5™™; gr t ‘width of anterior wing I antennz sub-clavate, some- 
what pilose, reach tomiddle of thorax. The cae is a little less hairy, and as long 
as the two following joints together. The fourth, fifth, sixth and seventh joints sub- 
equal. Ten of the eleven joints are plainly marked when viewed wit ith a -glass, 
Head and thorax black, dull, punctate, rugose and covered, though not densely, with 
fine gray hairs. Abdomen shining black, polistied sparsely hairy; as long as head 
Fic. 2.—Female /sosoma nigrum n. sp. Magnified ten diam.) 
and thorax together and larger than thorax. The antennz, ae scape, mouth- 
parts, head, abdomen and thorax rax, except a small, rounded, lig t-colored spot on 
pa pronotum just back of the eyes, are pitchy black. The eka ters, femora, mid- 
and posterior tibiæ black. The anterior tibiæ, tibio-femoral aake a. wal 
distal end of anterior femora, and tarsi are yellowis -brown, In e cases the 
tal ends of the tarsi are dusky. The legs ar EES pilose. The wing-vens are 
ing. 
m ; ma 
and a heeadha-s Des „n from more than 100 specim Wi ings in all 
perfect. Variations very slig 
The « eggs (Fig. 3) are hee 75 to 100 in number; 1™™ long, and each with a 
Fic. 3.—The egg. 
pedicel two and one-half times as long as the egg. 
Male; Length of ER, expands 5.8™™; greatest width of front wing 1. 
antennze sub-cylindrical, lo: nger than in the female, with more and anaes as! 
the last seven joints ual. Thorax and abdomen as in nthe female, except that 
the pronotal sen: is wanting or very obscure; the abdomen slightly peduncled, 
shorter and hardly larger than the thorax. Coloration of body and appendages 
same as in female. Venation similar to that of female. The wings in both sexes 
are margined with hairs, which are rather coarse along the marginal and post 
