346 



MORPHID^. 



8. Ops. BEnECYNTiius. 



Papilio Berecynthus Fabr. Spec. Ins. ii. p. 59-, Ent. Syst. 

 III. pt. 1. p. 1.51.; Cramer, Pap. pi. 184. f. B.C.; 

 Stall, Suppl. Cr. pi. 3. f. 4. A. B. C. (caterpillars and 

 chrysalis) ; Seha, Mus. 4. t. 13. f. 2, 3. ; Godart, Erie. 

 31. IX. p. 453. n. SQ, ; Huhner, Samml. exot, Schm. 

 Band i. pi. — . 

 Surinam, Brazil. B. M. 



g. Ops. Sallei. 



Opsiphanes Sallei DoiM. ITcstw. iS^ HewHs. Gen. Diarn. 

 Lep. pi. .57. f. 2. 

 Venezuela. B. M. 



10. Ops. C'assi/E. 



Papilio Cassiffi Linn. Syst. Nat. ii. p. 767. n. 120., Mus. 

 Lud. Uli: p. 265. ; Clerch, Icon. t. 34. f. 3, 4. ; Me- 

 rian, Surin. Ins. t. 32. ; Fabricius, Syst. Ent. p. 483. 

 n. 178., Ent. Syst. in. p. 1. n. 150.; Cramer, I'ap. 

 pi. 105. f. A.E.,'l06. f. A.; Stall, Suppl. Cram. pi. 3. 



f. 3. A. B. (caterpillar and chrysalis) ; Gadart, Enc. M. 

 IX. p. 454. n. 42. (Morpho C.) ; Hiibner, Samml. exot. 

 Schm. Band i. pi. — . <? pi. — . ? . 

 Papilio Gly eerie Fabricius, Ent. Syst. iii. pt. I. p. 94. 



n. 291. 

 Papilio Quiteria Cramer, pi. 313. f. A. B. C. D. 

 Surinam, Brazil, Colombia. B. M. 



11. Ops. CEthon. 



Papilio CEthon Fabricius, Spec. Ins. ii. p. 59. ; Ent. Syst. 

 III. pt. 1. p. 152. n. 485., Godart, Enc. M. ix. p. 452. 

 n. 38. 

 Surinam. 



12. Ops. Invirje. 



Potamis supcrba Invirje Hiibner, Samml. exot. Sclim. Band 



i. pi. — . male. 

 Brassolis Invirse Hiibner, op. cit. Band ii. pi. — . fem. 

 Brazil ? 



Genus VIII. DYNASTOR. 



Dtnastor E. Douhleday MS. 

 Megastes Boisduval MS. 

 MoEPHO and Pavonia p. God'. 



Body very robust; labial palpi very closely applied to. the face; hind wings of the males not tufted. 

 Head moderately large, finely hairy, not tufted. 



Eyes large, naked. 



Antenna short, slender, terminated by a slender gradually formed club, finely carinated beneath. 



Labial Palpi small, erect, compressed, of nearly equal width throughout, applied quite close to the face, so as to 

 be scarcely visible from above, hairy ; the tip extending nearly to, or above, the level of the top of the eyes ; 

 terminal joint slender ; basal joint vei-y much curved. 

 Thorax very robust, hairy, especially on tlie inetatliorax. 



Fore Wings large, elongate-triangular. Costal margin arched ; apical angle rounded. Apical margin slightly 

 convex, and scarcely scalloped. Inner margin somewhat longer than the apical, nearly straight. Costal and 

 jiostcostal veins with the branches of the latter arranged as in Opsiphanes. Upper disco-cellular short, oblique, 

 middle disco-cellular much longer, slightly curved at its base ; outer disco-cellular shorter than the middle, 

 transverse, uniting with the third branch of the median vein near the middle of the wing ; the space between 

 the first and second branches of the median vein being very much shorter than those between the origin of the 

 third branch and its junction with the outer disco-cellular. 



nind Winys large, broadly ovate. Hinder margin rounded, entire, scarcely scalloped. A^'eins arranged as in 

 Opsiphanes, except that the prediscoidal cell is somewhat smaller ; disc in the males destitute of fascicles of 

 hairs. 



Fore Legs of the male small, slender, and but slightly brush-like. The tarsus about two thirds of the length of 

 the tibia, slender, cylindrical, and simple. Fore Legs of the female one third longer, and much more robust 

 than those of the male ; clothed with closely adpressed scaly hairs. The tarsus as thick as the tibia, articulated ; 

 the three middle articulations shortly spiued beneath ; the terminal joint small and unarmed. 



Four Hiiid Legs moderately long. Femur longer than the tibia, curved. Tibia thickest before the middle, hairy, 

 scarcely spincd. Tibial spurs minute. Tarsi slender, shortly hairy, and with rows of spines beneath. Claws 

 and paronychia small. 



The two insects of which tliis genus is composed might almost, from tlie robustness of the body and wings, and the peculiar style of 

 their colouring, be mistaken for great moths. Notwithstanding their very powerfully built bodies, they seem scarcely fitted, however, 

 for rapid Hight. They are distinguished from the preceding genera of the present family by the \)a\\n being applied quite close to the 

 face, the moderate size of the prediscoidal cell of the hind wings, the shorter extent of the discoidal cell of the fore wings, and the approxi- 

 mation of the first and second branches of the median vein of the fore wings. The want of tufts of hairs on tlie under wings of the 

 males is also a characteristic distinction. 



The type of the genus represented in our PI. LVIII. has appropriately (so far, at least, as such a compliment to so remarkable a 

 man can be deemed appropriate,) been named in honour of the great Emperor of the French. It is certainly one of the most striking 

 of the Diurnal Lepidoptcra, and its appearance is quite unusual. Its under side is fulvous, with a vast number of ill-defined darker 



