18S3.] 221 



Pronofum yellowish, with two contiguous median tubercles. Mesonotum having 

 the lobes broadly fuscescent. Metanotum yellowish. 



Legs yellowish, with concolorous hairs ; knees blackish ; a brownish mark at 

 apex of tibiae, and the under-side of the tarsi (especially the posterior) is also 

 brownish. 



Wings yellowish-grey, very broad, nearly equal in form, the apices almost semi- 

 circular : the anterior pair closely freckled with pale grey spots arranged in many 

 transverse series ; towards the extreme base the spots are darker, and there are the 

 usual two blackish horny points, one towards the base below the first sector, the 

 other towards the disc below the 1st branch of the second sector ; neuration yellowish 

 with pale hairs ; second sector with four principal branches ; a well-defined series 

 of gradate nervules extending obliquely from below the 4th branch of the second 

 sector (in addition to the nervules in the basal half of the wing) : posterior-wings 

 slightly paler, without grey spots, but with the usual two dark horny points. 



Abdomen fuscescent, clothed with very long yellow hairs ; apex yellow, the 

 incrassate lateral valves very thick, meeting above and below (in the dry insect), 

 leaving a narrow long-oval apical cavity between them ; they are clothed with ex- 

 tremely long yellow hairs. 



Expanse of wings, 21 mm. ; length of an anterior-wing, llj mm., breadth of 

 same, 6 mm. 



Habitat : Japan (Fukushima in the main Island, 28th July, 

 1881), 1 c?. 



For this very interesting addition to our knowledge of the geo- 

 graphical distribution of Dilar, I am indebted to Mr. George Lewis. 



In colour D.japonicus much resembles D. Sornei, McLach., from 

 N. W. India {cf. Ent. Mo. Mag., v, p. 239), but is larger, and the 

 wings are considerably broader and more semicircular at the apex, and 

 have the markings paler ; there appears, moreover, to be an outer 

 series of gradate veinlets in the anterior-wings that is not present in 

 the types of Hornei. Furthermore, the condition of the abdominal 

 apical cavity is strikingly different, and there is no trace of the su- 

 perior lamina or lobe seen in Hornei {cf. figure of apex of abdomen of 

 Hornei, Ent. Mo. Mag., v, p. 240). 



D. Hornei, japonicus, and no doubt Nietneri (unknown to me, cf. 

 Hag., Stett. ent. Zeit., 1866, p. 296), differ from the South European 

 forms in the joiuts of the antennae being shorter and more dilated, 

 but with much longer and stronger branches ; otherwise, they appear 

 to be quite cpngeneric, and there is a general resemblance rendering 

 specific differentiation difiicult. 



D. Prestoni from S. America, and D. americanus from N. America, 

 differ in their small size and in neuration, and perhaps will be eventually 

 separated generically (cf McLach., Ent. Mo. Mag., xviii, p. 55). 



Lewisham : SrcZ February, 1883. 



