346 
PACIFIC SCIENCE, Vol. XI, July, 1957 
distal three of which are rather more widely 
spaced than the others; these spines (Fig. 9) 
are finely fringed along the proximal edge and 
range from 80 n to 95 /x in length. The sub- 
ventral tuft has five plumose branches, and 
originates just beyond the middle of the 
siphon. 
A lightly chitinized saddle covers the dorsal 
two-thirds of the anal segment; it is not 
pilose, but bears numerous fringed scales dis- 
tally (Fig. 6); the apical scales (Fig. 11) are 
the longest, ranging up to 75 /x in length. 
The plumose lateral seta is four- or five- 
branched, the ventral brush consists of two 
parallel rows of five tufts each having six 
branches, and the caudal setae— the upper of 
which has six branches while the lower is 
single— are simple. Dorsal pair of anal papil- 
lae longer than ventral, ranging from little 
more than the length of the saddle to twice 
the length of the latter. 
SYSTEMATIC POSITION 
The spotted wings clothed with broad 
scales, the outstanding apical scales of ab- 
dominal sternites VI and VII, the banding 
of the legs, and the leaf axil habitat and 
stellate setae of the larvae all refer this Finlaya 
to the kochi group as defined by Marks (1947) . 
As previously stated, two representatives 
of this group are already known from Fiji 
and western Polynesia. These are easily dif- 
ferentiated from one another in both larval 
and adult states. The pale scales of the meso- 
notum are frosty white in A. fijiensis (as in 
A. kochi itself) and creamy to ochreous in 
A. samoanus\ the male genitalia differ in sev- 
eral respects, the specialized seta of the coxite 
being broadly expanded medially in the for- 
mer species and uniformly narrow in the latter 
one, the preapical tuft of the coxite consisting 
of 5 to 7 long and very narrow scales in A. 
fijiensis but of 10 to 12 long and broad scales 
in A. samoanus , and the style bearing sub- 
terminal setae in A. fijiensis alone; the larval 
siphon is pilose in the latter species (Marks, 
1947) but bare, or only slightly pilose, in A. 
samoanus (Bohart and Ingram, 1946). In both 
insects the lateral comb scales have from two 
to four short lateral spines near the base (Fig. 
10, B, A. samoanus ). 
The lack of any medial or other expansion 
of the threadlike specialized seta, the presence 
of 14 narrow and broad scales instead of only 
5 to 7 narrow ones in the preapical tuft of 
the coxite, the absence of subterminal setae 
from the style, the presence of but few scat- 
tered spicules on the siphon and the complete 
absence of lateral spines from the comb scales, 
all combine to differentiate the Finlaya of 
Freycinetia axils from A. fijiensis . However, 
while the present species is at once disting- 
uishable from A. samoanus by the absence of 
basal spines from the lateral comb scales, 
these two mosquitoes otherwise have much 
in common, and a closer comparison of their 
similarities and differences is indicated. 
For the reasons already given, a full com- 
parison of the adults cannot be made at pres- 
ent. The wing length of the females is similar, 
being 3.0 mm. in A. freycinetiae n. sp. and 3.0 
mm. (Bohart and Ingram, 1946) to 3.2 mm. 
(Marks, 1947) in A. samoanus (that of A. 
fijiensis ranges from 2.7 mm. to 2.9 mm. ac- 
cording to Marks). There are, however, dif- 
ferences in venation. While Marks described 
the sector pale area of C as long in A. samoa- 
nus, this area is little more than half the length 
of the preceding dark spot in A . freycinetiae 
n. sp. The subcostal pale area of C is equal to 
or almost twice as long as the preceding dark 
spot in A. samoanus , but is only two-thirds 
the length of this spot in the present species; 
while the latter has cell R 2 three times the 
length of its stem, this cell varying from two 
to two-and-a-half times the length of its stem 
in A. samoanus. 
Bohart and Ingram (1946) described the 
male palpi of A. samoanus as being about as 
long as the proboscis. These structures (which 
are slightly longer than the proboscis in A. 
fijiensis) exceed the proboscis by rather more 
than the length of the apical segment in A. 
