— 170 — 



1 it r.il strip ■. Legs and whole of the underside yellowish, mottled with red. Spiracles 

 yellow, edged \\ ith red. 



Length 34 mm. 



From a small brood raised on Oak by Miss E. Morton of New Wind- 

 sor, X. Y. 1 regret that it was not in my power to observe the stages 

 beyond those described, but I believe Miss Morton was so fortunate as to 

 raise the larva to perfection. 



Datana perspicua, G, & R. Egg and larval stages. 



Sgg.—'Dull white, laid in small, compact irregular mas>es, united side by side. 

 They are ovate, and when the larva emerges it does so by a large circular opening, 

 eaten away by the larva, and occupying l of the shell. 



Young larva. — After exclusion from the egg. Head and anal segment black 

 shining. 2nd segment also jet-black, rather raised centrally, shining in the centre of 

 the dorsum only. Ground color dull yellowish, with two stripes dull red, the 

 stripe double the width of the others. The lateral stripes are 3 in number on each 

 side, those in the centre being tin- widest. The extreme lateral Stripe immediately 

 above the spiracles is slightly waved in its outline. Thoracic feet black, abdominal 

 legs reddish brown. 



Length, 4 days after exclusion, 9 mm. 



After 1st moult. — The colors are now a little brighter. The black of the 2nd 

 segment is reduced by the widening of the lateral stripes as is also that of the anal 

 segment. The 12th segment has a small brown shining tubercle in the centre. 



Length, (9 days), 18 mm. 



After 2nd moult. — Head jet-black 2nd segment brown-black in centre. The 

 stripes are dull yellow, the spaces between being reddish brown, that on the dorsum 

 much the widest. Spiracles jet-black. Underside brownish orange, base of all the 

 legs with a reddish tinge. Legs, feet, anal segment, all jet-black, shining. 



Length 26 mm. 



After 3rd moult. —Head jet-black. 2nd segment chestnut brown, shading into 

 blackish brown in the central region. The stripes are now all broad, and very bright 

 sulphur yellow, giving the insect a brilliant appearance. Ventral stripe also very 

 broad, Base oi feet and legs bright orange, their tips jet-black. 



Between this and the mature larva the stages were not observed. 



Mature larva. J lead bright wine-red, shining, rather coarsely punctured. Upper 

 mandibles pitchy black, lower wine-red. The 2nd segment is also red in the centre, 

 tin- yellow hues faintly shown on the red ground color. The body is a deep chestnut 

 red, varying in some individuals to a darker shade, almost black, or at least pitchy. 

 The longitudinal lines are n in number, and are almost all of equal width. They are 

 arranged 3 on each side subdorsally, 2 laterally and 1 ventrally. The spaces between 

 them are widest on the dorsum and on the lateral region enclosing the spiracles, 

 which are black. The color of these longitudinal lines is vivid lemon yellow, darker 

 and brighter than in any other species, and the larva has a very gay and attractive ap- 

 pearance. In some examples the subdorsal yellow stripes are almost confluent. The 

 stripes are thinly covered with red irrorations, from the base of which spring sordid 

 white hairs. The feet and legs are reddish at their base, the extremities being pitchy 

 black. 



Length 60 mm. 



Food plant, Stag-horn Sumach. (Rhus typhina L. ) 



