366 Mr. A. U. Butler on Heteruceroas Lepiduptera 



primaries with the apical half and costal border brownish ; 

 a distinct blackish or black undulated discal stripe ; a 

 very slender black-dotted blackish marginal line ; fringe 

 sordid, slightly greyish ; primaries with a minute grey 

 or blackish disco-cellular dot ; secondaries with a con- 

 spicuous black disco-cellular spot. Expanse of wings, 

 (? 49 mm. ; ? 43 mm. 

 " Las Zorras, in January." — T. E. 



The following genus is a puzzling one ; having the 

 s})eckled wings of a Boarniia, but the general outline of 

 some of the Larentmhe ; I think it is best located here. 



Plectroboaemia, n. g. 



Aspect of Boarmia or Tephrosla ; but the primaries 

 with very acute apex ; costal margin of primaries nearly 

 straight ; outer margins of all the wings undulated ; 

 sec(mdaries rather small, triangular, the costal vein 

 running close to the subcostal to the second third of the 

 discoidal cell, so as to appear as though it were emitted 

 from it ; body rather slender ; palpi with long fringe, 

 with small terminal joint, porrect, projecting in front of 

 the head ; antennae simple ; abdomen scarcely extending 

 beyond the secondaries ; legs long and slender. 



39. Plectrohoarmia sordida, n. s. 



Sordid white, sericeous, irrorated with grey and black 

 atoms ; an abbreviated oblique bisinuated dusky line 

 from the subcostal vein to the basal third of inner 

 margin, and two better defined approximated transverse 

 slightly undulated discal lines, converging a little towards 

 the inner margin ; a very slender black marginal line, 

 spotted with black at the extremities of the veins ; 

 secondaries crossed beyond the middle by two very 

 slender indistinct dusky lines, the outer one irregular, 

 and marked upon the veins with short black dashes ; 

 outer margin with black edge and spots as on the 

 primaries ; under surface whiter, more sericeous, and 

 less densely irrorated with brown and black than above; 

 no dusky lines, but brownish disco-cellular spots ; 

 marginal line and spots as above ; pectus brown, with 

 darker s[)eckles ; venter sordid white, irrorated with 

 blackish. Expanse of wings, 37 mm. 



" Las Zorras, in February." — T. E. 



