120 [June 



broader towards the apex than in Arctia, where it is more acute. In 

 this respect it resembles Halesidota. 4th median curved sHghtly, aris- 

 ing much nearer the middle of the wing than in Arctia ; and nearer 

 also to the 3rd median, to which it is parallel. 



Its affinity to Halesidota is still more striking in the form of the 

 secondaries, which are much produced towards the apex. The costa 

 is much bent in the middle ; in Arctia it is not bent at all ; and the 

 long outer edge is somewhat angulated. Legs large and stout, finely 

 scaled, resembling the stout finely scaled legs of Halesidota and Ecpan- 

 theria. 



The species are pure white, with black stripes along the nervures, 

 not in the interspaces as in Arctia. 



In the figure of Abbot's, the larva of S. echo have the dorsal hairs 

 arranged in high broad tufts which show the transition from Arctia, in 

 the larva of which the fascicles are of uniform length, to Halesidota 

 where the fascicles often form tufts and pencils of hairs. 



Seirarctia Echo. 



Phalcena Echo Smith, N. H. Lep. Ins. Ga. p. 13 J. PI. 08. (1797). 

 JIi/2}ha)itria Echo Ciena., Proc. Acad. 'Nat. Sci. Phil. p. 5.31. (Nov. 1860). 

 Spi/oso»ia Echo Morris, Synopsis Lep. X. Amer. Appendix, p. 3i2. (1860). 



Seirarctia Clio n. sjj. 



S . White, streaked longitudinally along the nervules with black 

 brown. Palpi above black. Prothorax immaculate. Meso-notum with 

 three black stripes, those of the patagia lined without with yellowish ; 

 hinder part of the thorax also yellow. 



Primaries pure white; median and internal nervures lined with black, 

 as is the internal margin partially. Ends of the 3rd subcostal, 4th and 

 5th s. c. entirely ; 2nd median entirely, and the remaining median 

 nervules partially black. Secondaries immaculate, except two apical 

 minute streaks. Costae of both wings beneath cream-white. The black 

 markings distinct beneath. Fore-legs darker above than the others, 

 and they are all more or less blackened at the joints above. 



Exp. wings. 2.0(J inches. 



California (Edwards). 



PYKRHARCTIA * nov. gen. 

 Head : front subquadrate, fuller and broader between the antennae 



'■■■ TTvppoi, yellowish red, Arctia. 



