92 



PSYCHE. 



[May iSy4. 



plate; row ii lateral, on joints 2-13; row iii 

 substigmatal on joints 2-13; row iv above 

 bases of legs on joints 2-4 and correspond- 

 ingly on joints 5, 6, 11 and 13 anteriorly. 

 There are three forms of the processes. The 

 first, rosette-like, has a very short shaft with 

 some 50 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 i on joints 4-12. 

 The second is intermediate. The shaft is 

 long with brown quills arranged around the 

 base and some 10 black spines with terminal 

 hairs, branching irregularly from tlie shaft 

 and usually forming a trifid or bifid apex. 

 This type is found in row i on joints 2, 3 and 

 13 and ill row ii on joints 2-13. In the third 

 form there are no quills, the long shaft fur- 

 nished with irregularly distributed, subradi- 

 ate branches tipped by long hairs. The 

 branches are black; but inany are partly or 

 wholly light brown. This type is found in 

 rows iii and iv. Three shining black, irreg- 

 ularly indented, hairy anal plates and a 

 large rounded quadrangular cervical shield, 

 bearing the processes of rows i 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, 

 giving a grayish appearance to the larva. 



Spiracles reddish white with a black line cen- 

 trally. Claspers of abdominal feet tinged 

 with dull crimson. 



Cocoon. — \'ery slight, composed of a few 

 threads drawing together loose material or, 

 more commonly, none. The larvae conceal 

 themselves, but do not enter the earth. 



Pupa. — Rounded conical, thickest through 

 the thora.K, tapering posteriori;. Cases 

 large and prominent, but very even and 

 closely packed. Anterior end rounded; pos- 

 terior end also rounded, much smaller. Seg- 

 mental incisures abrupt, not deep, with little 

 capability of motion. Cremaster reduced to 

 a bunch of short hairs on a slight promi- 

 nence, colored red-brown, curving outward. 

 Surface finely granular. Color dark mahog- 

 ony red, the cases a little paler. Length 25 

 mm.; width through thorax 9 mm., through 

 abdomen at second moveable incisure 7 mm. 

 Four incisures are well marked; but the pos- 

 terior one is scarcely moveable, being 

 coarsely punctured, while the others are 

 smooth. Imago in about 50 davs at'ter pupa- 

 lion. 



Fcod flaiits. — Wild lilac (Ceanotlius), 

 Manzanita ( Arctostaphylos), etc. Fed in 

 confinement on cultivated cherrv. 



Larvae from Watsonville, California. 

 Others seen, but not bred, at Yosemite and 

 Monterey, Cal. and Portland, Oregon. The 

 larvae are gregaLious till quite large. 



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