22 
work in fuscous; cilia upon fuscous portion very strong and black, on 
the remainder small and white. The pattern of the network of the type 
specimen is shown in fig. 5 a, but it varies considerably, as is shown 
by recently reared additional specimens. The clear oblique line is 
narrow and perfectly straight; the hind wings entirely hyaline. 
Male. — Smaller than the female, which it otherwise closely resem- 
bles. The general color is darker and the black markings are broader. 
The penis is long; the abdomen of one specimen is entirely black above 
and of another yellowish, with black transverse bands at joints. 
Originally described from one female specimen reared from Prosopo- 
phora on linden in the District of Columbia in 1ST!). Four additional 
specimens, two females and two males, were reared in April, 1895, from 
the same host insect. Other specimens have been reared from Chion- 
aspti pinifolii received from Providence, R. I., and from a Prosopophora 
Fig. 6.— PeriMoptertu puleheUiu, n<\\ Bpecies, female; ventral view at left, dorsal view at right 
iw ingB removed)— greatly enlarged (original). 
on cottonwood from East Atchison, Mo., sent in by Mr. W. S. Connor, 
while «a single specimen has been reared by Mr. W. G. Johnson, at 
Champaign, 111., from a species of Aspidiotus on currant, and is now in 
the collection of the Illinois State Laboratory of Natural History. All 
the specimens vary somewhat in wing markings, but the general pat- 
tern remains the same as that shown at fig. 5 a. 
Perissopterus mexicanns n. sp. (fig. 5 b). 
Female. — Length, 0.84 mm.; expanse, 2.3 mm.; greatest breadth of 
fore-wing, 0.41 mm. Head and thorax closely and finely punctate; eyes 
smooth; dorsal surface of abdomen faintly shagreened; wing markings 
of type sliown in figure. General color light orange-yellow, without the 
strong reddish, hue and admixture of white seen in pulehellus. Prono- 
tum, tegulaj, postscutellum, metascutum, under side of abdomen and 
