958 
SCHIZURA. By Dr. M. Drattdt. 
dark inner-angular spot. Distributed in the Atlantic States. — Structure of larva like that of lignicolor, but 
with another elevation on the 9th segment; thoracal segment whitish, marbled reddish, the rest of the body 
brown with a velvety blackish-brown saddle-spot. It lives on many foliage-trees, chiefly on willows, poplars 
and birches, as well as on maple, apple and alder. 
■pcrangulata. D. perangulata Edw. (149 d) is somewhat like semirufescens, but more whitish ash-grey, with a reddish- 
brown tint at the inner margin; it is easily discernible from all the preceding species by the distinct strongly 
dentate double postmedian line and a dark shadowy spot behind the cross-vein; dark streaks in the marginal 
area between the veins, the two thickest above the anal angle, some finer ones subapical. Hindwing dirty 
whitish with a blackish inner-angular spot. Colorado, Utah. 
manni. D. mamii Schs. (149 d) is blackish-brown on the forewing as far as the black anterior transverse line, 
silvery grey between the dusted cinnamon brown median vein and the similarly coloured inner margin; the 
median line is divided into two branches below the cell, the cell-end behind it is whitish, behind the velvety 
black cross-vein streak follows a broad blackish-brown transverse shadow reaching neither the costal nor inner 
margin, then the double black deeply dentate posterior transverse line which is filled with lighter; some ochreous 
scales behind it; the whole apical half is light grey, the marginal area below it red-brown with fine black inter¬ 
nerval streaks and a quadrangular white spot above the anal angle. Hindwing whitish, broadly brownish at 
the margin. Expanse of wings: 34 mm. Bolivia. 
hertha. D. hertha Dogn. is very different; forewing reddish light brown, strewn with whitish in the upper half, 
an indistinct ring-macula and reniform macula in the cell; the anterior transverse line is indistinct, the posterior 
one is quite absent, some brown internerval streaks before the margin. Hindwing white, broadly smoked at the 
costal margin and distal margin. Expanse of wings: 40 mm. Described from Argentina. 
klagesi. D. klagesi Drc. has remained unknown to me, it seems to belong near to centralis. Forewing light 
reddish light brown, strewn with brown scales, greyish-black in the basal area; a large black spot at the cell- 
end. Hindwing white, grey at the costal margin and apex, a black spot at the anal angle. Expanse of wings: 
45 mm. Trinidad. 
67. Genus: Scltizura Dbld, 
It shows in general the very same anatomical marks as Dicentria and is distinguished from it merely 
by the shorter and broader shape of the wings and the shorter stouter abdomen. Yet the transition from the 
narrow-winged forms to the broad-winged ones is so gradual that several species may be ranged under either 
of the two genera ad lib. Beside a number of North American species, also some tropical forms have been 
described to belong to this genus. 
Type of genus: S. impomeae Dbld. 
npomeae. S. impomeae Dbld. (= biguttatus Pack., confusa Wkr., ducens Wkr., corticea Wkr., compta Wkr., 
nigrosignata Wkr.) (149 d) is a larger species with reddish-brown, black-veined forewings with a grey costal 
margin with the brown beginnings of the transverse lines the anterior one of which is the most distinct; the 
cross-vein streak is red-brown, surrounded by grey, and shaded dark distally and below; the veins are interrupted 
by grey postmedianly, two submarginal rows of indistinct red-brown internerval spots; the red-brown fringe is 
cinereo- speckled dirty white. - f. cinereofrons Pack. (= urtipennis Wkr.) (149 d) exhibits the whole discal part of the 
pons, forewing from the base to the margin dusted with dark brown, costal and inner margins ash-grey with a lilac 
telifer. tint. — f. telifer Grt. is founded upon aberratively marked specimens with 2 long black longitudinal stripes, one 
through the cross-vein streak, the other one along the submedian vein. — The larva is green on the 3 thoracal 
segments, dark brown on the head and the posterior segments with 2 coherent white dorsal spots marbled brown 
on the middle segments and a posteriorly open similar V-spot behind the two-pointed dorsal protuberance on 
the 8th segment; the point on the 4th segment is bent hindward, not forward as in Dicentria , and erectile and 
movable as there. It lives in the Northern States on oaks and many other foliage-trees such as maple, elms, 
birches, besides on Rubus, Vaccinium, Ceanothus and other plants; in the Gulf States it is found on Ipomea 
coccinea. It transforms in a web in the earth, and the imago appears during a very extensive period from March 
until August, probably in several generations. 
concinna. S. concirsna Abb. tfc Sm. (= nitida Pack., deba Drc.) (149e) is much smaller with light brownish 
forewings, the inner-marginal area tinged red-brown, a small discal dot below the origin of vein 5 and some 
dark strigiform spots submarginally at the anal angle and subapically; the costal-marginal area is tinged 
somewhat more lilac grey. Hindwing white, slightly smoked at the margin. The $ is darker on the whole with 
salicis. brownish-grey hindwings. — f. salicis Edw. ( = riversii Behr) from California hardly deserves a denomination, 
it is only somewhat larger with somewhat more pointed hindwings. The larvae have habits quite uncommon 
