114 BRITISH LEPIDOPTERA. 



case) not in definite rows, but evenly distributed, and usually clothe the 

 pectinations to the tips. In a specimen of P. villosella examined, they 

 appeared to be naked as also in W. reticella. The antennal structure 

 shows D. herminata to be a good Psychid, that of N. monilifera 

 suggests an alliance, in this direction, with certain Adelids (Chapman). 

 In the Psychids, the frenulum does not present any very remarkable 

 features. It is present in all the £ specimens examined, but is in 

 most cases, slender and rather weak. The retinaculum also is usually 

 feebly developed. The apterous and ill-developed character of the females 

 of almost all the British Psychids reduces the enquiry to an examination 

 of the male sex only (except in Narycia and Diplodoma). In Psychoides 

 verhuella, sometimes placed at the bottom of this stirps, the spina 

 of the male is slender, the retinaculum consisting of a group of hairs 

 and broad scales on the costal nervure. The female has two slender 

 spinulae locking into a slight fasciculus of scales on the median nervure. 

 In Narycia monilifera the $ spina is slender and pale in colour, lock- 

 ing into an inconspicuous retinaculum Avhilst the 5 has three slender 

 spinulae. The male of Diplodoma {herminata) has a slender spina, a 

 bright transparent brown retinaculum, covered and concealed by an 

 overlapping fringe of scales. Solenobia (inconspicuella) has the spina 

 very slender and weak, the retinaculum a mere bunch of scales, whilst 

 in Taleporia (tubidosa) the spina is long but slender, the retinaculum, 

 also, simply a group of long scales. In Bankesia (conspurcatella) the 

 spina is very slender, the retinaculum is bare, but stronger than in 

 many allied species. Comparing this with the two preceding, one 

 may say that in T. tubidosa the spina is slightly thicker and the retina- 

 culum more strongly fringed with hairs, whilst in 6'. inconspicuella the 

 spina is darker and the retinaculum is coated with thin straggling 

 hairs, but decidedly weaker than in B. conspurcatella. In Fumea, the 

 spina is slender, but whilst the retinaculum of F. casta is very weak 

 and inconspicuous, that of P. crassiorella forms a small close-fitting 

 pocket on the nervure, covered by a few long hairs, and that of 

 P\ saxicolella is rather conspicuous, bare of hairs, corneous and covered 

 somewhat thickly with small scales, and larger than the retinaculum 

 of F. crassiorella. In Proutia (betulina) the spina is very slender, the 

 retinaculum very small and weak. In Luffia (lapidella) the spina is 

 slender, the retinaculum small and closely curling into a tight tube for 

 the spina, studded by a few long hairs, whilst in Bacotia (sepium) the 

 spina is rather thicker and stronger than in the allied species, and 

 the retinaculum is short and almost bare of scales. In Whittleia 

 (reticella) the spina is slender and very glossy, the retinaculum small 

 but effective. In Epichnopteryx ()>ulla) the spina is very slender, the 

 retinaculum varies from a weak and slight bunch of scales to one that 

 forms a very small sac or pocket on the nervure, almost bare of scales, 

 and grips the spina closely. In Sterrhopterix standfussi, the spina is 

 long but slender whilst the retinaculum forms a flattened pocket on the 

 nervure, almost bare of scales. In »S'. zermattensis the spina is long and 

 black and the retinaculum stands out boldly from the nervure curled 

 over into a hook or ring. In Pachythelia (villosella) the spina is fairly 

 strong, the retinaculum forming a pocket on the nervure almost bare 

 of scales, whilst in Canephora (unicolor) the spina is well-developed, 

 the tip received into a small pocket on the nervure almost bare of 

 scales, but edged with a few broad scales (Griffiths). 



