Genera and S}Dccies of the famihj Pi/ralidae. 27 



oblique inwardly and only indicated by a more dense black irrora- 

 tion; postmedial line black, from two-third of costa, very oblique 

 to vein 5, broad and almost straight, then forming an outward curve 

 till vein 2 and dentate between each vein, then curved inwardly 

 to vein 16, then oblique to near tornus (probably this line is formed 

 in the same way as in melanospar sails, but the origin of the sub- 

 terminal line and the greater part of what was the postmedial line 

 beyond vein 5 is entirely lost, so that it appears one continuous 

 line) ; area before the postmedial line and a thin line beyond it of 

 ground-colour and thinly irrorated with deep olive and black; 

 remaining space beyond jjostmedial light line and termen entirely 

 filled in with deep olive, slightly irrorated, especially on the veins? 

 with black ; a broad black terminal line, leaving a striga of ground- 

 colour on each vein ; cilia with three rows of chequered fuscous- 

 black scaling ojiposite the veins. Hind- wing very sparsely irrorated 

 with fuscous at basal two-third; a postmedial fuscous irroration 

 from costa to vein 16, then faintly continued between veins \a and 

 16 to base of wing, this irroration is very dense, broad and black 

 between Ic and vein 3 ; a little distance from this postmedial 

 irroration the apical area as far as vein Ic is thinly irrorated with 

 fuscous ; a broad terminal black line as in fore-wing ; cilia, as in 

 fore-wing, but getting of ground-colour near tornus. 



Underside : — both Avings only irrorated at costal and apical 

 region and very thinly fuscous in fore- wing and brownish in hind- 

 wing; a fuscous dense irroration in cell of fore-wing and a rather 

 dense irrorated patch at end of cell ; a similar patch in cell of hind- 

 wing ; postmedial line as on ujaperside, but more faint ; terminal 

 lines consist of small black maculae only, situated between the 

 veins; cilia as on upperside. Female Avith the antennae very 

 shortly ciliated; wings on upjjer- and under-side as in male but 

 more densely irrorated, especially in hind-wing. 



Exp. Male 25 mm. ; female 28 mm. 



Hah. Male and female type, Biilawayo, 15-23. xii. 1919; 

 eleven other males from Hope Fountain (near Bulawayo) ; 

 Umtali, Emangeni in Dec. and Jan. This species is 

 probably a development of M. melanosparsalis. 



PYRALINAE. 



Delopterus, gen. nov. 



Type basalis 

 Proboscis well developed; palpi porrect, extending beyond head 

 about diameter of eye, loosely covered with scales, tliird jomt hidden 



