366 
PACIFIC SCIENCE, Vol. VII, July, 1953 
No attempts have been made in the past 
to determine the relationship of the nivipes- 
group to other species groups. The ornamen- 
tation of the adults is so characteristic and 
distinctive that it isolates the group. It is in- 
teresting to note that the development of 
broad scales on ppn is restricted to just two 
species outside of this group, U. nivipleura 
Leicester, 1908, and U. hehes Barraud, 1931, 
whereas U. unguiculata Edwards, 1913, has 
lanceolate scales. These three species appear 
entirely unrelated and distinct from the nivipes- 
group. The male genitalia of the nivipes- 
group have the mesosome similar to- that of 
all the other ornamented species found in the 
Solomons except U. solomonis and the ninth 
tergite much like that of U, wysockii, the 
tibialis- gr^on-p, and U. atra. The larva of U. 
sexaueri, on the other hand, is most closely 
related to that of U. civinskii. 
Biolo^ 
The immature stages of U. sexaueri have 
been collected on Guadalcanal only in dense 
jungle swamps in association with U. harnesi 
and U. solomonis. This species appears to be 
rare in the Solomons. 
Living larvae are easily confused with U. 
solomonis but with some care can be distin- 
guished by the lighter pigmentation of the 
head capsule and antenna and the consider- 
ably longer siphon. The pupae are quite 
distinctive as they have a moderately long 
trumpet (index about 3.5) that is dark in the 
basal half and golden brown apically. 
We had little success rearing this species in 
the laboratory, although U. harnesi and U'. 
solomonis larvae collected at the same time came 
through readily. 
The adults of this species were not collected 
on Guadalcanal, and no information is avail- 
able on their habits. 
Distribution 
Solomon Islands, Guadalcanal: North and 
northwest coast (JNB et aL; K. L. Knight) 
[USNM, JNB]. Bougainville: Empress Augus- 
ta Bay, 2M, 3F(G-103A); IF, 3L(G-388) (A. 
B. Gurney) [USNM]. 
6. IJranotaenia wysockii Belkin n. sp. 
Plates 11, 12 
Diagnosis 
ADULT. — Head dark-scaled centrally; mod- 
erate white orbital line; a few dark erect ver- 
tical scales; conspicuous white frontal tuft. 
Scutal integument entirely dark; narrow line 
of white scales on lower margin from wing 
root to wing root around front; apn and stp 
each with narrow line of white scales forming 
streak in line with white-scaling of head. Tarsi 
light on all legs from basal third of segment 
3, pure white on III, cream-colored on I and 
II; conspicuous white knee spots on all fem- 
ora. Wing with conspicuous black and 
white pattern. Abdominal tergites 1-4 largely 
white-scaled, 5 white-scaled on apical third, 
6 and 7 with narrow median apical transverse 
white bands. Male legs without conspicuous 
modifications. 
PUPA. — Trumpet length 6.5 miedian width; 
tracheoid extending to 0.5; uniformly lightly 
pigmented; no slit in meatus. Hairs 4, 5-C 
usually 3, 4b; 3-11 2, 3b, close to 2-II; l-III 
usually 3b; 4-IV-VI usually 3b, extending to 
middle of second segment following; 6-I-V 
usually single (1-2). Paddle almost as wide 
as long, hair absent. 
LARVA.— Head approximately as wide as 
long; hairs weakly pigmented, no spikes; 1-A 
placed near middle, 3b, almost as long as 
antenna; 14-C dendritic. Thorax and abdomen 
with slender dorsal and ventral stellate hairs, 
usually with four to six branches of uneven 
lengths; some very elongate strong single 
hairs on thorax. Thoracic hairs 9-M, T, 8-M, 
and 7-T multiple, barbed; 4-P 2b; 7-P 2-4b; 
9-P 2, 3b, uneven; 14-P single. Abdominal 
hairs 6-III-VIII stellate, much shorter than 
6-I-II, without tubercles; l-I, II usually 4b, 
uneven; 6-1, II usually 2b, uneven; 6-III, IV 
usually 4-5b. Comb plates separate; scales 
fringed. Siphon index about 3.0; pecten ex- 
