510 PROF. J. O. WESTWOOD ON THE UEANIID^. 



therefore, to retain Hiibner's name, with a slightly altered termination, for uniformity, 

 into Alcidia. 



The name Chrysiridia, given by Hiibner to P. rip/teus, is a happy one, and may be 

 retained for that brilliant insect ; but it has unfortunately happened for Hiibner's last 

 name, Mania, that it has been employed by Treitschke for a genus of Noctuidae, for 

 which it is still retained by Guenee and H. Doubleday ; I therefore have the less hesi- 

 tation in altering Hiibner's name into Manidia, and in rejecting the subsequent name 

 given to it of Sematura. 



In 1825 the Swedish naturalist Dalman, in his monograph of Castnia, neglected 

 the arrangements of Fabricius and Hiibner, blaming the former for inserting P. orontes, 

 liinn., in the genus Castnia, with the observation " quae vero species minime liujus 

 generis sed ad NrcTALrDEAS nostras pertinet, etsi transitum memorabilem Papilionides 

 inter et Nyctalideas bene offert. Genera hue pertinentia sequenti modo distribuere 

 tentavimus : 



" Cydimon : Ripheits, Sloaneus, Leilus et forte Lavinia Pabr. = Gen. Urania Fabr. Latr.' 

 Nyctalbmon : Orontes, Patroclus. 

 Sematura : Lunus, ^gistus Fabr., Empedocles Herbst.^' 



To which he adds Thysania with ayripjnna, odor a, &c., as types, evidently identical 

 with the Noctuideous genus Erebus, and also doubtfully the genus Agarista of Leach 

 (Zool. Misc. i. tab. xv.). 



It will be seen that the genus Cydimon of Dalman is equivalent to the Chrysiridia 

 and Urania of Hiibner, that Nyctalemoyi, Dalm., = the Lyssce and Alcides of Hiibner, 

 and that Sematura, Dalm., = Mania of Hiibner. 



In 1840 (Introd. Mod. Class. Ins. ii. p. 369) I separated these insects into a single 

 family placed between the Sphingidse and Anthi'oceridse. 



In 1854 Mr. Walker, in his Catalogue of the Collection of the British Museum 

 (Lepidopteva Heterocera, Pt. 1), adopted the genera Urania for Leilus and Rhipheus, 

 Nyctalemon for Orontes and Patroclus, to which he added Lunus and its allies (gen. 

 Sematura, Dalman), and Coronis; which last, notwithstanding its intimate relation- 

 ship with Sematura, Lunus, &c., he placed in the family Castnii, as Latreille had 

 done. 



Lastly, in 1857, M. A. Guenee (Hist. Nat. Ins. Lep. torn, ix.) has arranged all the 

 preceding genera into one group, Uranides, at the head of his Phalenites (Geometra, 

 Linn.), divided into four families : 



1. CyDiiMoNiDiE : Gen. Cydimon {Leilus ha.). 

 !.'. UranidjE: Gen. Urania (Rhipheus). 



3. NYCTALiEMOxiD.-E : Geii. Alcidis (Ch-ontes) and Nyctalemon [Patroclus &c.). 



4. Sematurid.€ : Gen. Sematura [Lunus he.) and Coronis [Orithea he). 



' "Obs. TTraniie nomon pro insectorum genere nuUo modo admittendum, etenim jamdiu plantaium genus, 

 notissimum quidem, sic voca'aim." 



