MflV 1S94. 



I 'SVC HE 



91 



'REPARATORV STAGES OF PSEUDOHAZIS SHASTAENSIS 



BEHRENS. 



BV HAKKISOX G. DVAIi, \h\V VOHK. 



PsEUDOHAzis snASTAEN^iis Behiens.* 



1880 — Behiens, No. Am. ent., i, 62. 



imr. DENUD.\TA Neumoegen. 



1891 — Neiiiii., Can. ent., wiii, 145. 



I have received the eggs of this species 

 from Mrs. S. J. Kidder, who lias very liindly 

 taken the trouble to find them and forward 

 tliem to me in good condition. They were 

 received in the fall of 1S92 and liatched on 

 May I ith following. 



Hggi — Deposited in a ring shaped mass 

 aroLind a leaf stem or twig, without covering. 

 Oval, flattened at the --ides, round on the 

 base, but flat on top, forming a distinct, ellip- 

 tical 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 wliiclr 

 is a dark brown border. Ileigiit 1 .8 mm.; 

 broad diameter centrally 1.6 mm., at top I.I 

 mm. ; narrow diameter centrall3' O.S mm., at 

 top 0.7 mm. Diii'ation of this stage through- 

 out the hibernating period. 



Lai-rn, siaffe I — Head round, bilobed, 

 shining black: antennae prominent; width 

 0-7-0.75 mm. Body dull black, feet reddish. 

 Rows of modified processes, apparently 

 arranged as in the mature larva, but only 

 three rows discernible. Row i very long, 

 rather slender, the anterior ones distinctly 

 furcate oi' trifid, each branch with a ver\' 

 long, minuteh" spinulose. jiale seta, e\en 

 longer than the shaft. The processes are 



* The common form of Pseudoll.lzis with purplish 

 fore wings has, strictly, never been described. Bois- 

 duval s.rys of egUtnterinn "alaeanticae albido-carneae" 

 which applies to the form described as arizonetisis by 

 Strecker. Behrens' shastaensis was described from 

 very black examples of the purple winged form, so this 

 name will obtain. The form is constant, and has as 

 go-id right to sp3citic recognition as any species in the 

 genus. 



shorter posteriorly, not furcate, though 

 many bear two of the long setae. Row ii 

 shorter than i with a seta from the middle 

 and one from apex. Row iii very sluut, but 

 many of the tubercles bear two setae. Anal 

 plate concolorous with anal feet. Duration 

 of this stage 13 days. 



S/ciffe II. — Head shining black, labrum 

 and bases of antennae paler; width i 0-1.2 

 mm. Body black, the tips of the spines 

 straw colored. Processes ver\' long, espe- 

 cially on joints 2-4 dorsally, where they are 

 1.5 mm. long. The others are nearlv as 

 long, but become gradually shorter posteri- 

 orly. 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 siiranal, the 

 others at base of each anal foot. 



Stage III. — Head depressed medially, 

 shining black, civpeus whitish; width 1.4- 

 1.8 mm. The characters of the mature larva 

 are now fir^t seen. Bod\' black, the pro- 

 cesses of row i 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, contrast- 

 ing with the bod\'. The other processes 

 have a long, thick shaft and separated 

 branches as all did in the previous stage- 

 Rather scant, pale hairs arise from the skin. 



Sliigc IV. — Much as in the next stage, but 

 darker, more shining, the bodv less hairy, 

 and without any distinct lines. Width of 

 head 2.2-3.3 nim. 



Stage V. — 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 mm- Processes arranged as follows : 

 row i subdorsal on joints 2-1 1, a single 

 dorsal one on joints 12 and 13. none on anal 



