146 
Marquesas archipelago. Two species are of 
interest here. 
Key to the species 
1. The third joint of the labial palpi is al- 
most as long as the second joint; the 
posterior wings have two medial 
white spots serva 
The third joint of the labial palpi is very 
short; the posterior wings present a 
medial white band . janata 
Achaea serva Fabricius 
Fig. 5 a-d 
Noctua serva Fabricius, Syst. Entom., p. 593, 
1775. 
Ophiusa serva Fabricius; Hampson, Fauna 
Brit. India, Moths 2: 495, 1894. 
Achaea serva Fabricius; Hampson, Cat. Lepid. 
Phal. B.M. 12: 521, fig. 123, 1913. 
Achaea serva Fabricius; Tams, Ins. of Samoa, 
Lepid. 4: 216, 1935. 
Achaea serva Fabricius; Gaede, in Seitz 11: 
480, pi. 52 d, 1938. 
Achaea serva Fabricius; Swezey, Bernice P. 
Bishop Mus., Bui. 186: 172, 1946. 
Achaea serva Fabricius; Viette, Pacific Sci- 
ence 3(4): 330, 1949. 
Wingspread 62-80 mm.; length of the 
anterior wings 34-41 mm. 
The head and the thorax are reddish brown 
and the abdomen brown-gray. 
The anterior wings are red-brown, more 
or less dark; the antemedial line is dark, ob- 
lique, waved; a black spot is in the middle 
of the medial cell; the reniform spot is small, 
occasionally even indistinct, and sometimes 
only a blackish shadow can be seen in its 
place; the medial line is slightly sinuous, 
curved exteriorly on a level with the medial 
cell; the postmedial line is dark and sinuous; 
the marginal area is of the background color, 
but darker, with an indication of a subter- 
minal line; sometimes there is a series of 
black spots along the external margin. 
PACIFIC SCIENCE, Vol. IV, April, 1950 
asymmetrical formation of the costal part of the 
left valva; c, right valva; d, penis. 
The posterior wings are black with a pur- 
plish blue reflection and on each wing there 
are five white spots, two in the middle, and 
three near the margin, at the extremity of 
costa, of M l>, and between Cun, and A 1. 
The underside of the four wings is grayish 
white, irrorated with black scales; in the an- 
terior wings, there are a white spot on the 
discocellular veins and a large black spot in 
the area of the inferior angle of the wing; 
in the posterior wings there is a brown sub- 
marginal band which becomes black toward 
the anal angle. 
Genitalia 6 : The tegumen is very nar- 
row and carries an important excrescence 
raised vertically, curved at its end, and clothed 
dorsally with strong bristles (Fig. 5a); the 
lateral parts of the ninth urite are progres- 
sively narrowed dorsally; the uncus is curved 
ventrally at its apex; the anal tube carries a 
very well- developed scaphium; at their base 
the valvae (Fig. 5c) have a long bag abun- 
dantly clothed with bristles, and they are 
