LYONETIA. 2838 
entirely wanting. Wing narrow, the anterior often caudulate, the pos- 
terior lanceolate. 
The insects of this family are mostly rather sluggish; Buceu- 
latrix shows more activity than any of the other genera. They 
may frequently be observed at rest on palings, trunks of trees, 
etc., and when disturbed generally content themselves with a 
single sudden movement to a fresh place of rest; even when on 
the wing their movements are slow. The larve, as far as known, 
are all miners; but in Buceulatrix it is only the young larva that 
mines. The larve, when full-fed, quit the mine (excepting in Phy/- 
Zocnistis), and form a silken cocoon, at some convenient place. 
This family comprises only five genera, which may be arranged 
thus :— 
a. Antenne as long as the anterior wings. 1. Lyonnrta. 
a a. Antenne shorter than the anterior wings. 
6. Head quite smooth. 
ce. Labial palpi filiform. 2, PHyLLOcNIsTIs. 
ec. Labial palpi none.” 3, CemMrosToMA. 
6 6. Head with a tuft ‘on the crown. 
d. Uabial palpi filiform. 4, OposTnea. 
d d. Labial palpi none. 6. BuccuLaTRIx. 
Genus I. LYONETIA. 
Lyonrrra, Hiib. V. 423 (1816); Zell. L. E. iii. Argyromiges p., 
Curt.; Step.? Zlachista p., Treit.; Dup. L. F. xi. Lyonetia p., 
Zell. Isis, 1889; Dup. Cat. 
Capilli squamacei, appressi, occipitales tenues suberecti. Antenne 
alarum longitudine, tenues, conchula basali mediocri. Palpi labiales 
breves, penduli. Ale anguste, anteriores caudate, posteriores se- 
tacere; anteriores: cellula discoidalis elongata, tenuis, acuminata, 
postice quinque ramos emittit, vena subdorsalis in basi furcata ; 
posteriores: venee subcostalis ac mediana non cum marginibus 
coalescentes. 
Head smooth, with appressed scales, at the back with slender slightly 
erect scales. Antenne as long as the anterior wings, slender, with a 
moderate-sized basal eye-cap. Labial palpi short, drooping. Wings 
narrow, the anterior caudate, the posterior setaceous. In the anterior 
wings the elongate, slender, pointed discoidal cell emits five veins pos- 
teriorly ; the subdorsal vein is furcate at the base; in the posterior 
wings the subcostal and median veins speedily become confluent with 
the margins. 
The insects of this genus have, from the elongate anterior 
wings and long antenne, some resemblance with the Gracilaria ; 
but their different position when at rest completely destroys the 
