336 GROTE AND ROBINSON. 



Arctia dahurica. (Plate 6, fig. 41,'^ .) 



Chehn'ia dahurica, Boisd., loon. Hist. Lep. 126, 2, fig. 1. (1832). 



Chelonia dahurica, Boisd., Lep. Cal. p. 48. (18.')2). 



Chelonia dahurica. H-S., Sanim. Eur. Sch. Band II, p. 145. (184.5). 



Arctia dahurica, Walk., C. B. M. Lep. Het. Pt. .3, p. 597. (1855). 



Arctia dahurica, Clem., Proc. Acad. Nat. Sci. Phil., p. 627. (1860). 



Arctia dahurica, Morris, Syn. Lep. N. A., p. 341. (1860). 



Arctia dahurica. Pack., Syn. U. S. Bomb., Proc. Ent. Soc. Phil. p. 118. (1864). 



% . — Head, pectus and labial palpi brownish; behind the antennae 

 are ochreous scales ; antennae black, finely bipectinate. Prothoracic 

 pieces black, edged with ochreous hairs. Thorax black. Patagia 

 black, fringed with ochreous. Thoracic parts, beneath, clothed with 

 long brownish black squamation. All the tibiae are pale ochreous out- 

 wardly, as are the hind tarsi, while the anterior femora are also parti- 

 ally ochreous towards the lower end "of the joint; elsewhere the legs 

 are black or blackish. Abdomen, at base and dorsally, black, laterally 

 bright ochreous; a segmentary series of black stigmatal spots. Be- 

 neath pale ochreous with sub-lateral series of broad segmentary macu- 

 lations diminishing towards the anus. 



Anterior wings somewhat produced at apices, black. Costal edge 

 towards the base pale' ochreous. Nervules finely marked by pale 

 ochreous scales. An incomplete sub-basal transverse band and an 

 outwardly arcuate median band, not extending below the internal ner- 

 vure. A longitudinal stripe running from the base below the median 

 nervure outwardly to internal angle, before which it is furcate on cell 

 1/y; on this stripe rests terminally a series of transverse bands resem- 

 bling the letter K, with the straight stroke turned towards the base of 

 the wing and the fusion of the bands obsolete on cell o. The short 

 fringes are pale yellow, and extend uninterruptedly from the apices 

 over the rounded internal angle along internal margin. Beneath, the 

 wing is paler, while the markings of the upper surface are repeated, 

 but less distinctly ; the veins are obsoletely marked with pale scales. 

 Secondaries largely black ; subterminally these show irregularly shaped 

 and elongated bright ochreous patches; fringes as on primaries. Be- 

 ni^ath, the secondaries are largely marked with bright ochreous bands 

 on a black ground. 



Expanse, 3t m. m. Length of hod u, 15 m. m. 



llahltnt. — California. Lortjuin. 



Allied to A. virginicula, Klrhy and A. speciosLssima, Movsrhhr. 

 The latter species is unknown to us and is possibly not sufficiently dis- 

 tinct from Kirby's, with which its describer has not compared it. Dr. 

 Boisduval, who communicated the specimen of A. dahurica we here de- 



