194 MR. J. O. WESTWOOD ON THE LEPIDOPTEROUS 



Having restored C. therapon and acrceoides (forming Boisduval's first section of 

 Orthia) to Castnia, and O. augias and nexa belonging to the Agaristides, I have been 

 compelled to regard C. pelasgus, Fabr., and unifasciata, Felder (which appears to me to 

 be identical with pelasgus), as a separate genus, for which I have, unwillingly, retained 

 the name of Orthia. 



Orthia pelasgus. Alis anticis nigris bronzeo-viridi tinctis, fascia lata lutescente aut 

 alba e medio costse ad angulum internum extensa, medio ejus paullo latiore apiceque 

 infero paullo incurvo ; alis posticis chalybeo-nigris, margine externo parum cserules- 

 cente. Expans. alar. ant. unc. 2^2— 2§. 



Papilio pelasgus, Fabricius, Sp. Ins. ii. p. 54 ; Ent. Syst. iii. pt. i. p. 46 ; Herbst, Ins. pi. 136. f. 6; Oliv. 

 Enc. M. Ins. pi. 12. f. 5; Cramer, iii. pi. 202. fig. D; Dalman, Monogr. p. 21; Act. Holm. 1824, 

 p. 404 (Castnia p.) ; Godart, Enc. Meth. ix.p. 801 ; Gray, Trans. Ent. Soc. L. ii. p. 146; Walker, 

 List Lep. Het. B. M. i. p. 22; Boisduval, H. n. Lep. Het. p. 54 (Orthia p.). 



Castnia unifasciata, Felder, Reise d. Novara, Zool. Band ii. Abth. 2, pi. 79. f. 5 (sine descr.) ; Bois- 

 duval, H. n. Lep. Het. p. 542 (Orthia unif.). 



H.-Sch., Samml. exot. Sch. pp. 56 and 78, gives O. augias, H.-S., as = pelasgus, F. 



Except in the white colour of the fascia of the fore wings, I can see nothing to separate 

 Dr. Eelder's figure from C. pelasgus of Cramer. 



Sab. Brasilia, Guiana, Surinam, Ega, Bolivia. In Mus. Britann., Hopeiano Oxonise, 

 Boisduval. 



Genus III. Synemon, E. Doubleday. (Plate XXXIII.) 



In Lord's Discov. in Australia; Klug, Abb. k. Akad. Berlin; Walker, List Lep. Heter. Brit. Mus. part i. ; 

 Boisduval, H. n. Lep. Het. 



1. Synemon Sophia. Nigro-fusca, alis anticis maris fuscis griseo-brunneoque nebulosis, 

 nebula obscura baseos alteraque submedia puncto albo adjecto; venis griseis, fcemince 

 nigricantibus squamis plumbeis irroratis, fasciam subapicalem maculis nigris divisam 

 formantibus, macula parva submedia fasciaque abbreviata costali maculari pone 

 medium : alis posticis maris basi nigris macula ovali ante medium, fascia maculari 

 pone medium maculisque submarginalibus flavis ; faemince nigris, macula magna 

 aurantiaca baseos, fasciaque lata abbreviata transversa marginis analis, macula 

 magna versus angulum externum, alter is que 3 vel 4 submarginalibus fulvis : alis 

 subtus luteis, fasciis ramosis nigris. Expans. alar, antic, lin. 18-22. 



Hesperia ? Sophia, Wbite, in Grey's Exped. Australia, App. p. 474, fig. 7 ; Doubleday, in Lord's Discov. 

 Australia, App. i. p. 516, pi. 3. f. 5 (Synemon Sophia) ; Walker, List Lep. Het. B. M. i. p. 34, vii. 

 p. 1583; Klug, Abhandl. kon. Akad. Berlin, 1850, p. 248, pi. annex, f. 1, 2 ; Boisduval, H. n. Lep. 

 He"t. p. 550. 



Hab. Australia, King George's Sound. In Mus. Britann., Hopeiano Oxoniae, 

 Boisduval. 



median vein, being separated from each other by the slenderly indicated fold running into the discoidal cell (the letters 

 e 3* in the plate being improperly placed opposite to its extremity), the closing of which by the transverse disco- 

 cellular vein is indicated by two small swellings, omitted by the engraver, opposite to each other in the middle of the 

 wing. 



