90 HETEROCERA. 
Type 7: Gelechia ? flavicostella Clms. (=costolutella Chmb. ; Chmb. 1872). 
Braor Chmb. Can. Ent. 4 209 (1872) : 9 24 (1877). oo, 
[5655 Dichomeris flavicostella Clms. Gelechia ? flavocostella Chums. Pr. Ac. Nat-Sc. Phil. 12 162 
(1860) n. syn. = Begoe costolutella Camb. Can. Ent. 4 209 (1872) ]. 
Although it is obvious that Chambers’ precise description of Begoe costolutella 
applies absolutely in every detail to the species which we know as Trichotaphe flavi- 
costella Clms., it is undeniable that Chambers himself, not only when describing 
costolutella (Can. Ent, 4 209), but subsequently, with even greater confidence (Can. 
Ent. 9 23-4), regarded it as a synonym of Nothris dolabella Z. 
Type 8: Epicorthylis inversella Z. (Z. 1873). 
Ericortuyis Z. Verh. ZB. Ges. Wien 23: 1873 Abh. 248-9 Pf. 3°134-» (1873): Hor. Soc. Ent. 
Ross. 18 332-3 Pf. 4° 105-> (1877). 
Type 9: Gelechia (Malacotricha) bilobella Z. (Z. 1873). 
GeLrecu1a (Mauacorricua Z.) Z. Verh. ZB. Ges. Wien 23:1873 Abh. 279, 280-2 Pf. 4°28a-> 
(1873) ; Wlsm. Tr. Am. Ent. Soc. 10 185 (1882). Matracorraicua Wlsm- Pr. Z. Soc. Lond. 
1897 84 no. 21 sp. 70 (1897). 
Type 10: Gelechia (Helcystogramma) ribbeella Z. 
Getecnia (Hetcystocramma Z.) Z. Hor. Soc. Ent. Ross. 18 369-73 Pf. 5:°126-7 (1877). 
Huxcystocramma Wlsm. Pr. Z. Soc. Lond. 1891 523, 546 no. 45 sp. 86 (1892) : 1897 83 
no. 19 sp. 67 (1897) ; [Meyr. Ent. Mo. Mag. 46 282 (1910). Type: obseratella Z.]. 
=* Noruzis (nec Hb.) Wlsm. Tr. Ent. Soc. Lond. 1881 267-8 Pf. 18°38 (1881) ; Bracuycrossara 
(Hnmn.) sect. B. Wism. Tr. Ent. Soc. Lond. 1891 98-9 Pf. 4-35 (1891). 
Extreme forms such as ligulella Hb. (Dichomeris Hb.) and flavicostella Clms. 
(Trichotaphe Clms.) are apparently so distinct that two genera have been long 
maintained for them (with the employment of “ Nothris” in cases of doubt) ; a gradual 
series of intermediate forms, however, occurs which renders it impossible to draw the 
dividing line between supposed genera which were only separated by the vestiture 
of the palpi. The familiar name Zrichotaphe, having served a useful purpose, must 
now be relegated to synonymy, and it may be emphasised that Nothris Hb., auct. 
(Type: verbascella Hb., FW: 2-3 separate) is at once separable from Dichomeris Hb. 
(Ypsolophus, auct., FW: 2-3 stalked) by the neuration, while in this it agrees with 
Gelechia Hb. (FW: 2-3 separate)—forms with the clothing of the palpi intermediate 
between Gelechia and Nothris (e.g. Oeseis Chmb.) occur in America and it is doubtful 
if on this character alone these genera can be separated. 
1. Dichomeris sciastes, sp.n. (Tab. III. fig. 10.) 
Antennae annulate with fuscous and pale cinereous. Palpi with triangular projecting tuft on the median 
joint; fawn-brown, shaded with fuscous externally. Head fawn-brown, a greyish shade along the 
middle. Thorax greyish fuscous, the tegulae paler. Forewings fawn-brown ; a small elongate fuscous 
shade along the base of the costa is followed by a diffused triangular shade of the same colour on the 
