NYMPH A LINsE. (Group NYMPS ALINA.) ?4 ' 
cavated above the posterior angle, posterior margin recurved ; costal vein extending 
to middle of costa; first subcostal veinlet emitted at one-fifth before end of the 
cell and ending at a little beyond the costal vein; second subcostal at one-tenth 
before end of cell; third subcostal at fully one-half beyond the cell; the cell very 
short and broad, closed; upper discocellular veinlet very short, middle discooellulai 
concave, lower discocellular almost straight, very slender; middle median veinlet 
emitted close to lower end of cell. Hinchving broad and prolonged posteriorly, 
anterior margin rather short, lobate at the base and excavated before the apex, 
which is acute; exterior margin oblique, scalloped from the apex and produced to a 
spatular-tail at end of upper median veinlet and broadly-lobate between lower 
median and the submedian; precostal vein curving from its base, slender, simple ; 
costal vein much arched from base of precostal and thence extending close along 
the margin to near the apex ; cell broad, closed ; subcostal branch widely separated 
from the costal; upper discocellular outwardly curved, lower discocellular outwardly 
oblique and very slender; middle median emitted close to end of cell. Body 
slender; palpi long, rather slender, directed upwards to middle of eyes and then 
porrected and projecting more than half its length beyond the head, somewhat 
cylindrical, the sides slightly flattened, very compactly clothed with short hairy 
scales which are slightly lax above and at base beneath, terminal joint nearly as 
long as second and obtusely pointed ; forelegs of male short, very slender; femur 
scaly above, clothed beneath with fine long silky hairs; tibia scaly ; tarsus sparsely 
clothed with very short hairs. Forelegs of female longer ; femur scaly above, finely 
hairy beneath; tibia and tarsus smooth ; tarsus broadly dilated towards end, apical 
joints minute, stoutly spined ; antennae slender, with a gradually-formed elongate 
jclub ; eyes naked. Type. —C. Thyonneus. 
Larva (0. Thyodamas ).— u Slender, cylindrical, smooth; with two long, curved, 
divergent filaments, or soft horns, on the head ; a single stouter sword-shaped one 
on the back of the fifth or sixth segment, curved backwards and serrated on its 
inner edge ; another on the last segment, curved forwards and serrated on its outer 
edge ” (j Davidson). 
Pupa.—“ Suspended by the tail. Very much compressed ; with a dorsal ridge 
from head to tail, high and obtusely pointed in the middle ; palpi cases united and 
produced into a long somewhat recurved snout ” {Davidson). 
Egg.—“ High domed-shape, or almost conical, with an aperture at the top 
fitted with a deeply dentate flat cap, like a cogged wheel ” {Davidson). 
Habits op Imago.-^“ All the species of this genus are very elegant insects on the 
wing, having a floating sailing flight, often settling on the wet sand on the borders 
of a stream to suck up the moisture, with wings very wide outspread and lying flat 
on the ground, the forewings much advanced in front of the head ; if disturbed they 
