356 Mr. A. G. Butler on Heterocerous Lepidoptera 



M^iitish at apex ; secondaries silvery whitish, sericeous, 

 flecked with brown, and with two brown lines similar to 

 those of the upper surface : body pale brown. Expanse 

 of wings, 31 mm. 



" La Union, in February."— T. E. 



Odontopera, Steph. 

 25. Odontopera fragilis, n. s. 



(? . Primaries above shining lilacine-grey, with 

 bronze-brown reflections ; a scarcely perceptible irre- 

 gularly undulated slender blackish line before the 

 middle, and a more distinct widely undulated and 

 angulated slender black line beyond the middle ; a black 

 spot at the end of the cell ; secondaries silvery grey, 

 indistinctly irrorated with brown, crossed beyond the 

 middle by a slightly angulated slender black-brown line ; 

 an abbreviated blackish anal dash ; veins slightly golden 

 towards the extremities ; body pale greyish brown, 

 with golden reflections ; under surface paler and more 

 sericeous than the upper surface ; primaries without 

 markings ; secondaries with a blackish spot at the end 

 of the cell, and almost sigmoidal slender blackish line 

 beyond the middle, and incomplete and very indistinct 

 irregular submarginal line. Expanse of wings, 42 mm. 



? . Primaries above bronze-brown, with a slight 

 greyish tint in certain lights ; outer border of a slightly 

 deeper colour, markings as in the male ; secondaries 

 grey, wtth bronze-brown veins, markings as in the male ; 

 body greyer than in the male, especially on the under 

 side ; under surface as in the male, excepting that there 

 are faint traces of the upper surface markings upon the 

 primaries. Expanse of wings, 46 mm. 



? var. Primaries pale sandy yellow, with deeper 

 coloured stripes (agreeing in form with the slender 

 black lines on the types) and outer border ; a conspicuous 

 l)lack disco-cellular spot ; body also yellowish ; otherwise 

 as in the typical form. Expanse of wings, 48 mm. 



"Las Zorras, in February." — T. E. 



Dectochilus, n. g. 

 Now that species are so rapidly being added to our 

 collections, it becomes necessary to pay attention to all 

 marked differences of structure. I therefore propose 



