GENUS CASTNIA AND SOME ALLIED GROUPS. 199 



obsoleta, alisque anticis apice acuniinatis e Castniis facile distinguitur. Caput magnum ; oculi maximi, 

 laterales, antice approximati, spatio angusto inter se separati; palpi tenuissimi, breves, erecti, ad 

 medium frontis vix attingentes, articulo penultimo longo, ultimo minuto acuto. Vestigium nullum 

 linguae spiralis detexi. Antenna circiter 50-articulatae, clavatse, articulis primis 32 filiformibus ; apice 

 acuto, parum incurvato, fasciculo parvo setarum terminate-. Thorax robustus. Abdomen mediocre. 

 Tibiae anticae breves, in medio calcari armatae. Tarsi antici elongati, pulvillo mediocri, unguibus 

 acutis, curvatis, simplicibus, setisque duabus elongatis apicalibus instructi. Alas sat magnae, anticae 

 trigones, margine apicab fere recto, apice acuminato producto ; posticae ovali-trigonae, tenaculo (seta 

 crassa curvata prope basin costae) anticis ligatae : anticae vena postcostali paulio ante medium alae 

 bifurcata, ramo antico ramulos tres emittente, quorum tertius (6 3) apicem alas attin°it, ramo 

 postico etiam tres emittente ; vena mediana ramulos quatuor emittente, quorum superior (seu diseo- 

 cellularis, c 3*) cum inferiore (b 5*) venae postcostalis venula nulla transversa conjungitur : alas 

 posticae vena postcostali bifida, ramulis liberis et cum venulis medianae baud conjunctis, vena mediana 

 e basi bipartita, singula parte etiam bifida, inde rami 4 mediani; vena anali et subanali simplicibus. 



Tascista orientalis. (Plate XXXIII. fig. 5.) Alis anticis saturate fuscis, fascia fere 

 recta obliqua pone medium costse fere ad angulum internum extensa albida, alis 

 posticis obscure aurantiaco-rufis, limbo lato fusco ; corpore nigricante, abdominis 

 apice rufescente. Long. corp. una lj. Expans. alar. unc. 3J. 

 Hab. Singapore (Wallace). InMus. Hopeiano Oxonise. 



Genus Y. Hecatesia. (Plate XXXIII. figs. 1—4.) 

 Hecatesia, Boisduval, Monogr. Zygaen. p. 11 ; Walker, List Lep. Het. B. M. i. p. 54. 

 Corpus sat crassum, abdomine in maribus barbato. Caput parvum, ocellis duobus instructum. Antenna 

 elongatae, cylindricae, pone medium in maribus fusiformes vel subfusiformes, in fosminis minus 

 incrassatae. Palpi ultra medium faciei assurgentes, dense hirsuti, articulis tribus, primo crassiore 

 curvato, tertio dimidium secuudi paulio superante. • Lingua elongata spiralis. Thorax valde birtus. 

 Alee, insecto quiescente, tectiformes, breves ; anticae in maribus spatio magno reniformi vitreo 

 transverse striolato, prope costam, instructae, bac in medio in tuberculum corneum elongatum dila- 

 tata, ramos venae postcostalis dislocante, scil. ramo primo curvato marginem posticum areae vitreae 

 formante, ramis 2, 3 et 4 subapicalibus ad basin inter se aeque distantibus, vena quinta prope basin 

 areae vitreae emissa, vena cellulam discoidalem claudente fere indistincta at curvata ; vena mediana 

 4-ramosa, ramis tribus ultimis ad basin valde approximatis : alae anticae in fcernina area vitrea 

 carentes; cellula magna discoidali, apice fere recta transversa, cellulaque parva angusta subcostali 

 distincta, ad apicem ejus ramos tres emittente, medio bifido : alae posticae cellula discoidali ad 

 trientem alae extensa, ibique transverse et indistincte desinens, vena 3 c* e medio ejus emissa. Pedes 

 satis graciles, tibiis barbatis ; tibiae anticae calcari forti medio instructae. 



This curious Australian genus was first described by Boisduval, and placed by him in 

 the family Zygsenidse, but removed to the Agaristides in his recent memoir on that tribe 

 published in the ' Revue de Zoologie,' 1874, in which position, between Eusemia and JEgo- 

 cera, it was placed by Walker. It appears to me, however, to be more nearly allied to 

 Castnia by means of the genus Synemon, agreeing with Castnia in the possession of the 

 small narrow subcostal cell formed by the branches of the postcostal vein, the fourth 

 of which arises from the third at some distance beyond the extremity of this small cell, 

 in the normally formed wing of the female. Until, however, we become acquainted with 



