Uranotaenia in Solomon Islands— Belkin 
317 
I do not feel justified in using it for Aus- 
tralasian species. Instead, for the present I 
prefer to use subsection C2 for the Papuan 
forms related to U. nigerrima and U. quad- 
rimaculata. 
It is probable that other distinctive groups 
of Uramtaenia await characterization among 
the Oriental and Australasian species, partic- 
ularly the nonornamented forms, some of 
which are undoubtedly closely related to or- 
namented forms whereas others are very dif- 
ferent. Until these are studied, nothing but 
speculations can be made about the relation- 
ship of the Solomons species. 
The different sections present in the Solo- 
mons are characterized as follows: 
Section Al. —Ninth tergite bare, emarginate 
apically, and with lateral lobe either broad 
or produced into spine; mesosome with 
strong teeth or spines arranged into apical 
and median groups. A pre-alar sclerite dis- 
tinctly separated from upper sternopleuron. 
Cell R2 short or very short, between 0.45 
and 0.3 of vein R2+3. Head with at most 
a few erect scales on vertex; at least a nar- 
row orbital line of light scales; frontal tuft 
present or absent. Palpus between 0.05 and 
0.08 of proboscis. Scutal vestiture largely 
composed of dark, narrow, curved scales 
with a patch or line of broad light scales 
restricted to front of wing root or extended 
cephalad. Pleura with apn light-scaled; ppn 
bare or with light scales; stp with transverse 
patch of light scales in upper third and 
variable number of light or dark scales in 
lower two thirds; only one strongly pro- 
pleural; one spiracular present; two or more 
upper mesepimerals present. Legs without 
light-scaled markings on femora. Included 
species: U. atra Theobald, £/. barnesi n. sp., 
U. dvinskii n. sp., U. solomonis n. sp., U. 
sexaueri n. sp. 
Section A2. — As in section Al except for the 
following: three or more strong propleu- 
rals; spiracular and upper mesepimerals ab- 
sent; conspicuous white knee spots on all 
femora. Included species: U. wysockii n. sp. 
Section C2.— Ninth tergite bare, broadly pro- 
duced in middle and without lateral lobe;, 
mesosome with numerous weak serrations 
not arranged into apical and median groups. 
Pre-alar area not distinctly separated from 
upper sternopleuron. Cell R2 very short, 
less than 0.3 of vein R2-I-3. Head with nu- 
merous conspicuous erect scales on vertex, 
no distinct orbital light-scaled line; frontal 
tuft not developed. Palpus about 0.1 of 
proboscis. Scutal vestiture of dark, narrow, 
curved scales, lighter near wing root (in 
related species broad scales over anterior 
end of ppn). Pleura with apn with trans- 
lucent scales, no scales on other sclerites; 
four strong propleural bristles; one spira- 
cular; three or four upper mesepimerals. 
Legs entirely dark-scaled. Included species: 
U. quadrimaculata Edwards and related Pa- 
puan species. 
Edwards has shown the importance of the 
shape of the ninth tergite of the male geni- 
talia in determining relationships in this ge- 
nus. Unfortunately, few other workers have 
paid much attention to this basic character, 
perhaps because of the minuteness of the geni- 
talia. The shape of the clasper has been recog- 
nized as offering specific differences as well 
as group differences. It appears too that the 
ornamentation of the mesosome as well as 
its shape may be of considerable diagnostic 
value. In the Solomons species the shape of 
the paramere is distinctive in several species. 
Of the other characters used previously, not 
enough attention has been given to the pro- 
portions of leg segments which are distinctive 
in every species I have studied. It appears 
that the thoracic scutal and pleural ornamen- 
tation is not as important a character as be- 
lieved by Edwards as several nonornamented 
species in the Oriental region undoubtedly 
are closely related to ornamented forms. 
Pupal Characters 
According to Edwards (1941: 364-365) and 
Penn (1949: 28-29) , the pupal stage of JJra- 
notaenia is not well defined. Although it is 
