186 
[October 
of the thorax black ; anterior lobe (or prsescutum) dull luteous. Wings of a uni¬ 
form grayish subhyaline color; veins fine, dusky; pterostigma grayish subhya¬ 
line, long, three times as long as wide, with the angle next the disk almost en¬ 
tirely rounded off; dis<;oidal bifurcation peduncled; submedian vein stopping 
when it attains the interior margin of the wing and forming no posterior mar¬ 
ginal cellule. Length to tip of wings 3^ mill. 
One specimen % ?—Near madidus Hagen, but differs in the nasus 
being immaculate, in the antennm being fuscous except at base, and 
in the wings being immaculate and their veins fuscous not luteous. 
May possibly be a variety of that species, but in Psocus the coloration 
of the wings is a very constant character. 
Ps. madescens, n. sp. 
Differs from the above only as follows:— Ist. The size is i smaller, 
’’Ind. The dark dots on the occiput are obsolete in two specimens and 
subobsolete in the other one. 'drd. The front wings, but not the hind 
wings, are fumose with about 10 or 12 hyaline spots and streaks always 
between and not on the veins, each cellule, except the pterostigma, 
containing one or two of them so as to occupy altogether about the 
wing, different specimens varying a little in the distribution of these 
spots. The wing-veins are much coarser.—Length to tip of wing 
24—■2f mill. Three specimens, all % ? Differs from madidus Hagen, 
in the nasus being immaculate, the antennae fuscous except at base, 
the wing-veins fuscous, not luteous, and the hyaline spots and streaks 
presenting no appearance of two bands. It cannot be a mere sexual 
variety of the preceding, for the eyes and antennae are similar. 
PERLINA. 
A^ote 5, p. 168.— Aoroneurta abnormis Newm., Walsh, and Acr. 
RUPINSULENSIS Walsh. I have now before me 7 % 4 9 of the former 
and 2 S 6 9 of the latter species, the % of which was previously un¬ 
known to me. In abnormis the antepenultimate 9 ventral is scarcely 
longer than the preceding segment, and its tip is scarcely at all pro¬ 
duced or curved, not covering more than 4 of the penultimate ven¬ 
tral, and there is no vestige on it of any subterminal tubercle. In 
rupinsulensis the antepenultimate 9 ventral is full half as long again 
as the preceding segment, and its tip is much produced, somewhat 
in the form of a rectangle truncate at tip, so as to cover full 4 of the 
penultimate ventral, and there is a distinct transverse linear tubercle 
upon it t of the distance from its base. This seems to be the only 
