in the Collection of W. W. Saunders, Esq. 271 



rotundatae, costa recta, margine exterlore convexo sub- 

 obliquo. 



Male. — Body stout, clothed with long hairs. Proboscis very 

 short. Palpi porrect, very short. Antennae more than half the 

 length of the body, broadly pectinated to the tips. Abdomen 

 not extending beyond the hind wings. Legs rather short ; spurs 

 of the hind-tibiae not long. Wings rather broad. Fore-wings 

 somewhat rounded at the tips; costa straight; exterior border 

 convex, slightly oblique ; interior angle rounded. 



The affinities of this genus are doubtful. It does not associate 

 well with the Liparidce or with the Notodontidce. 



Rhagotiis bicolor. 

 Mas, — Cervina, tibiis anticis intus nigris, alis subtus litura 

 discali magna fasciaque sub-marginali sub-obsoleta nigrican- 

 tibus, alis anticis litura discali parva nigra, linea interrupta 

 angulari lituraque exteriore discali nigricantibus, alis posticis 

 nigricantibus cervino-marginatis. 



Male. — Fawn-colour. Antennae with black branches. Fore- 

 tibiae black on the inner side. Wings beneath with a large black- 

 ish discal mark, and with some vestiges of a blackish sub-mar- 

 ginal band, which is most distinct on the under side. Fore-wings 

 with a small black discal mark, which forms part of a slight, 

 interrupted, angular, transverse, blackish line ; a small more 

 exterior blackish discal mark. Hind-wings blackish, bordered 

 with fawn-colour. 



Length of the body 6 lines ; of the wings 16 lines. 



California. 



Fam. NOTODONTID^. 



Genus Datana, Walk. 



The Datance hitherto described are inhabitants of North America, 

 but the following species does not seem to differ from them in 

 generic structure. 



Datana ruficollis. 

 Fcem. — Ochraceo- cervina, capita thoraccque rufescentibus, ab- 

 domine cylindrico alas posticas superante, alis anticis lineis 

 quatuor rectis fuscescentibus, alis posticis pallide cinereo- 

 cervinis. 



Female. — Ochraceous fawn-colour. Head and thorax reddish, 

 the latter short. Antennae simple. Abdomen cylindrical, ex- 



