15 
tip and not extending farther than tip of club in the direction of apex 
of wing. 
Redescribed from 1 female specimen reared from Ely mux americanus 
at Carbondale, 111., April, 1882, by Prof. G. H. French. 
Isosoma macula turn n. sp. 
Female. — Length, 3.8 mm.; expanse, 5.4 mm. Sculpturing of head 
and mesonotum as with preceding species; metanotum with a very 
shallow, scarcely margined, central longitudinal furrow, including 
throughout nearly its whole length a median longitudinal carina; the 
rest of the sclerite irregularly and coarsely rugulose, the elevations 
mainly taking a longitudinal direction; hind coxa3 faintly granulate 
above; pronotal spot very large, even more pronounced than with pre- 
ceding species and covering two-thirds of dorsal aspect of fore border 
of pronotum; axillae meeting at tip. Antennae as with preceding spe- 
cies, except that club is decidedly flattened from sides. Abdomen 
smooth and shining, not quite as long as thorax; segments 3 to 5 
Fig. 5. — Isosoma websteri Howard. 
slightly and gradually increasing in length ; joint 6 a little shorter 
than 5; flagellum of antennae rather shorter than preceding species; 
relative proportions of joints about the same. Body sparsely hairy; 
stigmal club as with preceding species. Coloration as with preceding 
species. 
Described from two female specimens collected on blue grass May 
19, 1886, and June 3, 1885, at Lafayette, Ind., by Prof. F. M. Webster. 
Isosoma websteri n. sp. (fig. 5). 
Female. — Length, 3.4 mm.; expanse, 6.3 mm. Head, pronotum, and 
mesonotum as with preceding species; metanotum with only the begin- 
ning of a central furrow, its lateral carinse immediately curving around 
to the sides, each inclosing an oval, flattened, nearly smooth portion of 
the metascutellum; a median carina extending nearly to the tip of the 
