157 
THE PLUME-MOTHS OF CEYLON. 
case shown, and the second leg reaches the head. The maxilla and 
first leg fall short, and expose a portion of the third leg, between 
and beyond the second. The appendages project freely over the 
fifth and sixth segments. 
“ The anal armature consists of ten or twelve fine spines, little 
more than hairs, curved and crossing one another in lyre shape, and 
having a fine recurved flattened extremity. There is also a small 
bristle above and below each (exposed) abdominal spiracle.” 
Key to Genera of Sinhalese Orneodid^j. 
Hind wing with six segments .. .. Orneodefe 
Hindwing with seven segments .. .. Triscaedecia 
ORNEODES, Latr. 
Antennae in male minutely ciliated. Labial palpi 3-jointed ; 
first joint very short, second joint much longer and usually straight, 
third sometimes nearly as long as second, sometimes much 
shorter. Maxillary palpi usually quite rudimentary, concealed 
under the scaling (in pygmcea minute, acuminate ; in trachyptera 
well developed). Haustellum moderate. Legs moderately long, 
rather stout, closely scaled; fore-tibia in male usually with 
(? androconial) tuft of scales; posterior tibial spurs moderately 
developed. Abdomen short and thick set. Fore- and hind-wing 
each cleft into six segments ; neuration completely developed, 
but in forewing veins 5,6, 9, 10 are often weakly developed or 
absent; no true discal cell in either wing. The sixth segment of 
hindwing usually provided in the male with a characteristic scent- 
apparatus composed of an elongated deep fold or pocket, open above, 
projecting below, in which lie long yellowish erectile sensory hairs, 
very regularly striped longitudinally, rounded at the tip, arranged 
distally ; in the female the fold is present, but without the scent- 
scales. Cilia without the ramified hair-scales so characteristic of the 
Pterophoridae. 
Artificial Key to Species of Orneodes. 
^ [Expanse under 10 mm. . . . . 2 
[Expanse 10 mm. or over .. .. 3 
Sixth segment h.w. much stouter than other 
2 segments .. .. .. miscroscopica 
j Sixth segment h.w. not stouter than other 
\ segments . . .. . . pygmcea 
3 ( Costa of f.w. with large patches of rough scales trachyptera 
i Costa of f.w. without such . . ^ f i .. 4 
^ f General colour bright ochreous-orange iC-H .. thapsina 
| General colour not bright ochre o us -orange . . 5 
g J Expanse over 20 mm. .. .. niphostrota 
{Expanse under 20 mm. .. .. 6 
