HYDROPTILID.i:. — HYDROPTILA. 151 



Berkshire ; and by the Rev. W. L. P. Garnons, at Layer Murney, 

 near Colchester, in Essex. 



Family II.— HYDROPTILIDiE mihi. 



AntenncE filiform^ very short, not very remote : maxillary palpi 5-jointed, some- 

 what pointed ; labial minute : head and thorax densely clothed with woolly 

 hairs : wings narrow, acute, or obtuse ; nervures obscure, radiating, with no 

 discoidal areolet : abdomen short or moderate : legs shortish ; four posterior 

 iibics furnished with spurs at the apex and in the middle : tarsi 5-jointed. 

 Larva residing in a flat kidney-shaped case, opening at each extremity by a 

 simple cleft, and composed of silk and a few grains of sand ; the larva itself 

 has the head and the three anterior segments narrow, the abdominal seg- 

 ments considerably dilated, and destitute of external respiratory organs ; the 

 legs are short : they undergo their metamorphoses in the case, by closing it 

 and fixing it on a stone. 



The pretty little tineiform insects included in this family are dis- 

 tinguished by having very short filiform antennae, which are either 

 perfectly simple, or strongly pectinated : the wings are long, narrow, 

 and acute, ciliated rather densely at the apex, and in the typical 

 genus along the costa and inner margins ; the four hinder tibise are 

 armed with spurs. Three genera occur in Britain, thus simply cha- 

 racterized : — 



Antennis simplicibus, baud pectinatis ; 



Tjiiis intermediis 2-calcaratis : . . 2. Hydroptila. 



1-calcaratis: . • 2. Agraylea. 



pectinatis : . . . . . .3. Narycia. 



Genus II.— HYDROPTILA, Dalman. 



Antennos sensibly thickened towards the apex, which is obtuse : maxillary 

 palpi with the articulations of nearly equal length, the terminal joint ovoid: 

 head small: eyes small, lateral: collar and thorax ovate: wings narrow, 

 acute, densely pilose, and ciliated on the margins, with few very indistinct 

 nervures ; posterior pair similar, not folded : abdomen short, slender, obtuse 

 in the males, acute in the females : legs moderate, intermediate and posterior 

 tibiae furnished with two pair of long spurs. 



From Narycia this genus differs by having the antennae perfectly 

 simple, the anterior wings narrow, acute at the apex, densely ciliated 

 on the costal and inner margins, and on the apex ; the palpi are 

 rather long and slender : the insects are of small size, and the species 

 resemble each other considerably in bulk, colour, and habit : they are 

 very active and nimble, and fly in the evening. 



