LEPIDOPTERA HETEROCERA. 321 



Group 4. ERCHIA. 



Corpus cylindricum, sublineare, sat gracile, breviusculum. Palpi 

 capite paullo breviores ; articulus 3us parvus, 2i quadrario non 

 longior. Antennae subpectinatse : corporis dimidio paullo longiores. 

 Abdomen alas posticas non superans. Pedes graciles ; tibiae anticae 

 subtus non dentatae ; posticae calcaribus quatuor mediocriter longis. 

 Alae sat angustae. 



Body cylindrical, nearly linear, rather slender and short. Palpi 

 rather shorter than the head ; third joint small, not more than one- 

 fourth of the length of the second. Antennae minutely pectinated, 

 a little more than half the length of the body. Abdomen not ex- 

 tending beyond the hind wings. Legs slender; fore tibiae not 

 dentated beneath; hind tibiae with four spurs of moderate length. 

 Wings rather narrow. 



4. DlOPTIS SEMISTEIA. 



Nigro-cyanea ; caput, prothorax et abdomen apice luteo-hirta ; pedes 

 subtus albidi ; alee anticce nigra, fascia brevi lata obliqua dis- 

 cali subarcuata alba ; postica albo fimbriate, striga discali 

 alba. 



Blackish blue. Head, prothorax and tip of the abdomen clothed 

 with luteous hairs. Proboscis ferruginous. Legs whitish beneath. 

 Fore wings black, with a short broad oblique very slightly curved 

 white band in the disk beyond the middle, with white veins. Hind 

 wings with a white fringe, and with a white fusiform discal streak 

 which is most apparent beneath. Length of the body 4£ lines ; of 

 the wings 16 lines. 



a. Brazil. From Mr. Bates'icollection. 



5. Dioptis Porphyria. 



Nigra, cyaneo varia ; alee albo ciliatce, anticce apice albo no take 

 vittaque pone medium obliqua e rnaculis duabus albis. 



Phalaena Porphyria, Cram. Pap. Exot. iv. 227, pi. 397, f. E. 



Surinam. 



Group 5. PHARA. 



Mas. Corpus cylindricum, gracile, lineare, mediocriter longum. 

 Palpi capitis longitudine ; articulus 3us conicus, 2i quadrario Ion- 



