252 Mr. R. M‘Lachlan’s Descriptions of 
spurs; posterior tibiz with two pairs of nearly equal spurs, the 
first pair placed close up to the apical. Abdomen short. 
A well-marked and distinct genus of Sericostomide, with some- 
what the facies of the European genus Silo of Curtis, to which it 
has some analogy in the presence of the longitudinal folds in the 
wings of the male, but in Si/o it is only the posterior wings that 
are thus provided. ‘The two pairs of spurs on the posterior tibiz 
are placed closer together than in any other genus with which I 
am acquainted, 
1. Pycnocentria funerea, n. sp. (Pl. XVIII. fig. 1.) 
P, antennis nigricante-fuscis ; capite et thorace castaneis, nigri- 
cante-hirtis ; alis anticis posticisque nigro-fuscis, plicis dis- 
tincte saturatioribus, illis macula ad angulum analem albida; 
pedibus anticis griseo-ochraceis, intermediis et posticis fuscis, 
tibiis ochraceis ; abdomine nigro-fusco ; apice superiore 
lamina elongata, depressa, obtusa, appendices intermedias 
preter apices incurvatos celante, instructo; appendicibus 
inferioribus duplicibus, ramo superiore quam inferiore bre- 
vioril et obtusiori; segmento antepenultimo ventrali (¢) la- 
mina obtusa instructo. (¢ et @.) 
Long. corp. 2 lin.; exp. alar, G6—64 lin. 
Habitat in Nova Zealandia. 
In Mus. Brit. 
Antenne blackish-fuscous. Head and thorax dark cliestnut- 
brown, clothed with blackish hairs. Palpi thickly clothed with 
blackish hairs. Anterior and posterior wings dark smoky-fuscous, 
almost black, the folds in the male conspicuously darker; in the 
former there is a small whitish spot at the anal angle. Anterior 
legs wholly greyish-ochreous ; intermediate and posterior legs 
with fuscous femora and tibie, and ochreous tarsi. Abdomen 
blackish-fuscous, the divisions of the segments paler. In the 
male the upper margin of the last abdominal segment is produced 
in the middle into a long flattened lobe, dilated at the base, but 
afterwards attenuated, and obtuse at the apex; from under this 
lobe project the curved points of the app. intermed.; app. sup. not 
apparent, perhaps concealed under the lobe; app. inf. double, 
consisting of two branches, the upper long, flattened, hairy and 
somewhat obtuse, the lower longer, and ending in an acute point ; 
penis long and exserted, perhaps provided with upper and under 
sheaths. The female possesses a short obtuse lobe on the ventral 
surface of the antepenultimate segment. 
