PEOF. J. O. WESTWOOD ON THE UEANUD^. 621 



B. {Sematurida Gueuee.) Fore wings with the upper diseoidal vein [b 5 *) arising at a short dis- 

 tance beyond the diseoidal cell, between the cell and the origin of the second branch of the 

 subcostal vein [b 2) . 



a. Diseoidal cell of the hind wings terminating at a distance before the emission of the first branch 



of the median vein. — Gen. Manidia, Westw. ; type U. lunus (figs. 10-12). 



b. Diseoidal cell of the hind wings extending nearly to the emission of the third branch of the 



median vein. — Gen. Coronidia, Westw.; type U. orithea (figs. 1-9). 



Genus 1. Ukanidia, Westw. 

 (Details, Plate LXXXV. figs. 13, 14.) 



Urania (pars) Fabricius, in Illig. Mag. vi. ; Hiibner, Verz. ; Latreille. 

 Cydimon (pars ult.) Dalman (1824), Kongl. Vet. Acad. p. 392. 

 Cydimon Guende, Felder, Blanchard, Boisduval, Rev. Zool. 1874, p. 10. 

 Urania (pars prior). Walker, List B.M. Lap. Het. p. 4. 

 Leilus (pars), Swainson, Zool. 111. n. ser. pi. 129. 



The species of this genus are remarkable for the habit of migrating in large numbers, 

 as described by Mr. MacLeay in his paper in the Society's 'Transactions.' Such flights 

 of U. leilus are also described in ' Nature,' iv. pp. 12, 13, 494 ; and the annual migrations 

 of TJ. fulgens from east to west in August and September, across the Isthmus of Panama, 

 are described in the same journal (' Nature,' viii. p. 536). 



Sp. 1. Ukanidia leilus. 

 Papilio leilus, Linn. S. N. ii. "50; Clerck, Icon. pi. 27. f. 1 ; Cramer, Pap. Exot. i. pi. 85. f. C, D; 

 Fabricius, Syst. Gloss. {Urania, L.) ; Guenee, Sp. Gen. ix. p. 7; Boisduval, Rev. Zool. 1874, 

 p. 10 [Cydimon, L.). 

 Lars heroica leilaria, Hiibner, Samml. ex. Schm. [L. B. heroica), pi. a. f. 1, 2. 

 Leilus surinamensis , Swainson, Zool. HI. 2nd ser. pi. 125. 

 Hah. Cayenne, Surinam. 



Sp. 2. Uranidia amphielus. 

 Cydemon amphielus, Boisduval, Rev. Zool. 1874, p. ] 1. 

 Cydimon leilus, var., Guenee, Sp. Gen. ix. p. 7. 



Hub. Trinidad. 



Sp. 3. Ur.\nidia brasiliensis. 

 Leilus brasiliensis, Swainson, Zool. 111. 2nd ser. pi. 126; Gueuee, Sp. Gen. ix. p. 7, pi. 1. f. 1. 

 Hah. Brazil. 



Sp. 4. Uranidia caci(;a. 



Cydimon cacica, Guenee, Sp. Gen. ix. p. 8; Boisduval, Rev. Zool. 1874, p. 11. 

 Hah. Mexico, Acapulco. 



