402 Mr. A. G. Butler on a Collection of 



Family 14. Cossidae. 



Genus 47. Cossus, Fabricius. 

 62. Cossus incanescens, n. sp. 



Primaries silvery whitish, transversely speckled with black 

 hatchings, crossed near base by a broad inarched band, and 

 on disk by an irregular, slightly narrower oblique band, the 

 two connected by a slender oblique streak, thus forming a 

 pale brown H ; secondaries silky pale grey : head and thorax 

 whitish ; collar transversely spotted with brown ; thorax 

 behind collar and in front of metathoracic portion transversely 

 banded with blackish : abdomen densely clothed with long 

 brown hairs, base and anus whitish : antennas white, with 

 pale brown pectinations : wings below shining whity brown ; 

 pectus clothed with sordid whitish woolly hairs. Expanse of 

 wings 1 inch 1 line. 



Natal. 



Allied to C. impeditus of Walker. 



Family 15. Hepialidae. 

 Genus 48. Goegopis, Hiibner. 

 63. Gorgopis libcmia?, Cramer. 



Natal (six examples). 



I am very doubtful of the correct identification of this 

 species. It is the G. libania of Walker ; but it is totally 

 unlike Cramer's figure in coloration and pattern, although like 

 it in form. We previously only had one specimen in the 

 collection, so that Walker may have looked upon it as a pos- 

 sible variety of Cramer's insect ; so far as I can see, the only 

 chance of its being the same rests in the possibility that the 

 figure is taken from a rubbed and greasy example. 



Family 16. Glottulidae. 



Subfamily Xylophasiinm, 

 Genus 49. Prodenia, Guene'e. 



64. Prodenia retina, Guene'e. 

 Natal. 

 Previously in the Museum from the Congo. 



