Preparatory Stages of Pseudohazis Shastaensis Behrens
International Journal of
PREPARATORY STAGES OF PSEUDOHAZIS SHASTAENSIS BEHRENS.
BY HARRISON G. DYAR NEW YORK.
PSEUDOHAZIS SHASTAEIq'SIS Behrens.* 188o--Behrens, No. Am. ent., i, 62. vat. DENUDAT& Neumoegen. I89ImNeum., Can. ent., xviii, 145. have received the eggs of this species from Mrs. S. J. Kidder, who has very kindly taken the trouble to find them and forward them to me in good condition. They were received in the fall of 1892 and hatched on May ilth following. lggs.mDeposited in a ring shaped mass around a leaf stem or twig, without covering. Oval, flattened" at the sides, round on the base, but flat on top, forming a distinct, elliptical area, slightly depressed centrally at the micropyle. Smooth, shining pale brown, covered with a white pigment below and on the narrower sides and forming a distinct ring around the top surface, inside of which is a dark brown border. Height t.8 ram.; broad diameter centrally 1.6 ram., at top I.I mm. narrow diameter centrally 0.8 ram., at top 0. 7 ram. Duration of this stage throughout the hibernating period. Larva, stage I.Head round, bilobed, shining black: antennae prominent; width o.7-o.75 ram. Body dull black, feet reddish. Rows of modified processes, apparently arranged as in the mature larva, but only three rows discernible. Row very long, rather slender, the anterior ones distinctly furcate or trifid, each branch with a very long, minutely spinulose, pale seta, even longer than the shaft. The processes are
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The common form of Pseudohazis with purplish
fore wings has, strictly, been described. Boil.
duval says of ef,lanterina ’alae anticae albido-carneaeV
which applies to the form described as arizonensis by
Strecker. Behrens’ shastaensis described from
vcry black examples of the purple vinged form, so this
will obtain. The form is constanL and has
good right to specific recognition any species in the
genus.
shorter posteriorly, not furcate, though
many bear two of the long setae. Row ii
shorter than with a seta from the middle
and one from apex. Row iii very short, but
many of the tubercles bear two setae. Anal
plate concolorous with anal feet. Duration
of this stage 13 days.
Stage II.--Head shining black, labrum
and bases of antennae paler; width 1.o-1.2
mm. Body black, the tips of the spines
straw colored. Processes very long,
especially on joints 2-4 dorsally where they are
1. 5 ram. long. The others are nearly as
long, but become gradually shorter
posteriorly. The processes bear about six branches
and are furcate at tip, each branch bearing a
single pale stiff hair, longer than the branch
itself. The branches arise alternately. Anal
plates three, large, black; one suranal, the
others at base of each anal foot.
Stage II[.Head depressed medially,
shining black, clypeus whitish; width 1. 4
1.8 mm. The characters of the mature larva
are now first seen. Body black, the
processes of row with a short shaft on joints
4-12 and close set branches, each tipped with
a short, black bristle or a long, pale seta.
The branches are brownish yellow,
contrasting with the body. The other processes
have a long, thick shaft and separated
branches as all did in the previous stage.
Rather scant, pale hair arise from the skin.
Stage IV:.Much as in the next stage, but
darker, more shining, the body less hairy,
and without any distinct lines. Width of
head 2.2-3. 3 ram.
Stage IZ.Head rounded, median suture
deep in front, clypeal sutures double; many
coarse pale hairs. Color shining black,
shaded with dull crimson on clypeus; width
3.7-4.5 ram. Processes arranged as follows:
row subdorsal on joints 2-11, a single
dorsal one on joints 12 and 13 none on anal
plate; row ii lateral, on joints 2-3; row iii
substigmatal on joints z-x3; row iv above
bases of legs on joints 2-4 and
correspondingly on joints 5, 6, t and 3 anteriorly.
There are three forms of the processes. The
first, rosette-like, has a very short shaft with
some 5o light brown quills with short black
tips, which probably produce the strong
urticating effect, besides a few central black
branches which bear long terminal hairs.
This type is found in row on joints 4-t2.
The second is intermediate. The shaft is
long with brown quills arranged around the
base and some [oblack spines with terminal
hairs, branching irregularly from the shaft
and usually forming a trifid or bifid apex.
This type is found in row on joints 2, 3 and
3 and in row ii on joints 2- 3. In the third
form there are no quills, the long shaft
furnished with irregularly distributed,
subradiate branches tipped by long hairs. The
branches are black; but many are partly or
wholly light brown. This type is found in
rows iii and iv. Three shining black,
irregularly indented, hairy anal plates and a
large rounded quadrangular cervical shield,
bearing the processes of rows and ii on
joint 2. Body black with faint subdorsal and
lateral and broader substigmatal, sinuate
lilac lines, or nearly immaculate. Hair from
the skin white not long, but quite abundant,
gi (...truncated)