201 
TRIPH.ENA MATERNA. 
PLATE XXV. Fig. 2. 
Phal. Noctua matema, Linn. — Noctua hybrida, Fahr.^ Cramer^ 
Pap. Exot., pi. 267, fig. E. ; Drury, Eccot. Ins., vol ii. pi. 13 
fig. 4. 
Triph^na may be briefly defined as having the 
fore wings bistigmatiferous, the palpi ascending, 
the wings incumbent and entire, the thorax not 
crested, the body flat, and the antennae simple. It 
contains a considerable number of well known and 
conspicuous British moths, which are commonly 
called yellow under-wings ; and it will be seen fron? 
the specimen here figured, that the foreign species 
bear a striking resemblance to them. 
T. matema expands about three inches and a 
half; the antennae are setaceous, the palpi yellow, 
with blue tips; the head is likewise tinged v/ith 
blue. The anterior wings are light brown, mottled 
with grey and green, the surface glossy, and the 
tints changing according to the direction in which 
the light falls on them. Posterior wings yellow, 
each of them with a round black spot in the centre ; 
the posterior border likewise edged with black, the 
inner margin of the band dentate, and the exterior 
