416 



PSYCHE. 



[November — December iSgo. 



large central black spot, larger than 

 the corresponding one in D. drexelii. 

 Greatest diameter i.i mm. ; at the top 

 .7 mm. ; height .7 mm. Laid in gioups 

 of from 90 to 100 on the underside of a 

 leaf of the food-plant. 



First stage. Head rounded, black, 

 shiny ; width .5 mm. Cervical shield, 

 anal plate, thoracic and anal feet and the 

 abdominal feet outwardly, black. Body, 

 wine redj a very broad subdorsal and 

 lateral yellowish band nearly entirely re- 

 placing the ground color, and each bi- 

 sected bv a narrow red line. Venter 

 without marks. A number of hairs 

 growing from minute dark brown warts. 

 These warts ar*e proportionally larger in 

 this stage than in any subsequent one. 

 Hairs also arise from the cervical shield 

 and anal feet. The larvae at this stage eat 

 the parenchyma of the leaf from above, 

 and when not feeding, rest on the lower 

 surface or on the stems. 



Second stage. Head rounded, rather 

 higher than wide ; shiny black, or with 

 a slight brownish tinge ; width i.i mm. 

 Body dark wine red, the two pale green- 

 ish yellow bands on each side as before, 

 very wide, nearly or quite lacking their 

 central lines, so that all that is left of 

 the ground color above is a narrow dor- 

 sal and subdorsal line. Venter wine 

 red with a central narrow pale yel- 

 low line. The hairs from the cervical 

 shield are long, the others short, aris- 

 ing from minute warts. As the stage 

 advances, the lateral bands become some- 

 what more distinctly divided by the 

 ground color and almost white, though 

 still possessing a yellow tinge. During 



this stage and subsequently the larvae eat 

 the whole leaf. 



Third stage. Head higher than 

 wide, narrowing a little toward the ver- 

 tex, depressed at the sutures. Color 

 sordid orange, becoming red-brown, 

 the ocelli and mouth parts black. 

 Width 1.6 mm. Cervical shield black 

 or partly orange ; feet and anal plate 

 black, shiny. Body blackish brown, 

 the stripes as before, yellowish white 

 faintly bisected by a fine line of the 

 ground color. Venter blackish vinous, 

 with traces, more or less distinct, of 

 a central wliite line. Bases of legs and 

 corresponding spots on the apodous 

 segments dark wine red, or orange 

 tinted. Spiracles and the minute pili- 

 ferous tubercles, black. Hair sordid 

 white, short, but a few long ones over- 

 hang the head. As in the previous 

 stage, the lines bisecting the lateral bands 

 become more distinct with advanc- 

 ing growth, the ground color becomes 

 darker, and the bands clear white. In 

 many examples, a subventral line inter- 

 rupted by the bases of the legs and 

 a central ventral line are to be seen. 



Fourth stage. Head as before, 

 brownish red becoming darker ; the 

 mouth parts, antennae and ocelli, black ; 

 width 3.1 mm. Body black, with four 

 lateral clear white stripes on each side, 

 much broader than the intervening 

 spaces, and three narrow ventral lines 

 represented in some examples by a few 

 linear dots only. Cervical shield light 

 brown, anal plate black or partly brown, 

 thoracic and anal feet and the abdominal 

 feet outwardly black ; bases of legs and 



