LEPIDOPTERA HETEROCERA. 319 



1. DlOPTIS DISCRETA. 



Nigra ; thorax ex parte et pectus albo hirta ; abdomen cyaneo- 

 nigrum; alee anticce striga basali media prasina maculaque 

 discali elliptica alba; posticce vitta brevi subfusiformi alba 

 nigro venosa. 



Black. Proboscis tawny. Thorax partly, pectus, coxa? and 

 fore femora clothed with white hairs. Abdomen bluish black. 

 Fore wings with a large transverse oblique elliptical white spot in 

 the disk beyond the middle. Hind wings with a nearly fusiform 

 discal black-veined white stripe, which extends from the base to a 

 little beyond the middle. Length of the body 7 lines; of the 

 wings 16 lines. 

 a. Ega, on the Amazon. From Mr. Bates' collection. 



Group 2. ERBESSA. 



Corpus cylindricum, gracile, lineare, sat longum. Palpi as- 

 cendentes, arcuati, capitis longitudine ; articulus 3us minimus, 2i 

 octava parte non iongior. Antennae simplices, gracillimae, corporis 

 dimidio multo longiores. Abdomen alas posticas quadrario super- 

 ans. Pedes graciles ; tibiae antics subtus dilatatae, posticae calca- 

 ribus quatuor longiusculis. Alae mediocriter longae lataeque. 



Body cylindrical, slender, linear, rather long. Palpi ascending, 

 curved, as long as the head ; third joint very small, not more than 

 one-eighth of the length of the second. Antennas simple, very 

 slender, much more than half the length of the body. Abdomen 

 extending for one-fourth of its length beyond the hind wings. 

 Legs slender; fore tibiae dilated beneath; hind tibiae with four 

 rather long spurs. Wings moderately broad and long. 



2. DlOPTIS SOBRIA. 



Nigro-cyanea ; corpus albo trivittatum, subtus album ; prothorax 

 luteo-hirtus ; alee aiitica macula magna obliqua subovali alba 

 hyalina discali, venis basim versus albicantibus ; posticce ma- 

 cula apicali subtus vittaque discali albis. 



Blackish blue. Palpi and legs white beneath. Proboscis 

 black. Thorax and abdomen with three white stripes, white be- 

 neath. Prothorax clothed with luteous hairs. Fore wings with a 

 large oblique nearly oval white hyaline spot beyond the middle of 

 the disk, traversed by white veins ; veins whitish towards the base. 

 Hind wings with a white hyaline discal stripe on both sides, and 



2 f 3 



