364 
ed base). Mesothorax: hair 1 (broken off), 
2(1), 3(3bf), 4(4f), 5(1), 6(1), 7(2f), 8(bro- 
ken off), 9(5b), 10(1), ll(5b), 12(1), 13(28, 
30d), 14(24, 30d). Metathorax: hair l(9b), 
2(3f), 3(4, 5b), 4(2b), 5(2b), 6(2, 3f), 7(8b), 
8(lld), 9(6b), 10(1), 11(3, 4f), 12(1, 2f), 
13(13b). 
Abdomen: Large hairs and tubercles of seg- 
ments I and II well pigmented; hairs of fol- 
lowing segments moderately pigmented; rela- 
tive position, length, and degree of develop- 
ment as figured; barbs when present slender 
and lightly pigmented. Stellate hairs (1, 6, 13) 
with equal branches; 4-II a stellate hair. Seg- 
ment I: hair l(broken off), 2(1), 3(1), 4(10, 
13b), 5(2, 3b), 6(2b), 7(1), 8(1, 2f), 9(5b), 
10(2, 3f), 12(1, 2f), 13(1, 2f). Segment II: 
hair 0(1), l(broken off), 2(1), 3(2, 3b), 4(6b), 
5 (3b), 6(2b, one side lower branch 3f), 7(1), 
8(1), 9(3b), 10(2, 3b), 11(1, 2f), 12(1), 13(7b). 
Segment III: hair 0(1), l(broken off), 2(1), 
3(2, 3b), 4(1), 5(2b), 6(7b), 7(4, 5b), 8(1, 3f), 
9(2b), 10(1, 3f), 11(2, 3b), 12(1, 2b), 13(7b), 
14(1). Segment IV: hair 0(1), 1 (broken off), 
2(1), 3(1), 4(2f), 5(2, 3b), 6(8b), 7(4, 5b), 
8(2, 3f), 9(1, 2b), 10(1, 3f), 11(1), 12(2b), 
13(7, 8b), 14(1). Segment V: hair 0(1), l(9b), 
2(1), 3(4b), 4(1), 5(2b), 6(broken off), 7(3b), 
8(1, 2f), 9(2b), 10(1), 11(1), 12(1), 13(broken 
off), 14(1). Segment VI: hair 0(1), 1 (broken 
off), 2(1), 3(2f), 4(4b), 5(1), 6(8b), 7(3b), 
8(2f), 9(1), 10(2b), ll(3f), 12(3f), 13(20, 
22d), 14(1). Segment VII: hair 0(1), l(broken 
off), 2(1), 3(broken off), 4(broken off), 
5(3b), 6(6-7b), 7(1, 2f), 8(6b), 9(3b), 10(bro- 
ken off), ll(4b), 12(1), 13(9b), 14(1). Seg- 
ment VIII: comb plate heavily sclerotized, 
well pigmented, ornamented with numerous 
imbrications, without visible spicules (at 430 
X); comb scales 6-7, second and third from 
most ventral greatly enlarged, very sharply 
pointed, with very inconspicuous basal lateral 
fringe as figured; hair 0(1), l(5b), 2(broken 
off), 3 (broken off), 4(broken off), 5 (8b), 
14(1, exceptionally long). Siphon: as figured; 
length 5.5 median width; uniformly darkly 
pigmented, ornamented with imbrications as 
PACIFIC SCIENCE, Vol. VII, July, 1953 
on comb plate; pecten extending to about 
0.3, teeth 12-14 with lateral and apical fringe 
as figured; valves as figured, ventral valve 
exceptionally long; hair 1(8, 9b, no conspic- 
uous basal expansion, barbs absent), 2(1, 
short, slender), 3-5 (apparently all present as 
setal rings, 3 closer to apex of valve than 
usual), 6(1, well developed, longer than valve), 
7(1, slender but conspicuous), 8(1, straight, 
slender, about as long as valve), 9(1, weak, 
straight, inconspicuous), 10-12 (not seen), 
13(1, very strong, twisted at base, longer than 
valve). Segment X: saddle well pigmented, 
darker dorsad; ornamented with imbrications 
as on comb plate; median width about 0.5 of 
length; caudal margin with numerous sharply 
pointed spines, proximally smaller and ap- 
pearing to arise from apical imbrications; gills 
about 0.5 saddle length, narrow, bluntly point- 
ed at apex; hair l(6b, about 0.5 length of sad- 
dle), 2(2b), 3(broken off), 4a(2b), 4b-d(bro- 
ken off), 4e(l, about 0.3 of saddle length). 
Types 
USNM No. 61,420 (holotype, allotype, pa- 
ratypes). Paratypes to be deposited in BMNH, 
CU, and CSIR (Canberra); also incoll.JNB. 
HOLOTYPE FLP(713-15) and allotype 
MLP(713-12), Guadalcanal: West Poha 
swamp, Nov. 3, 1944 (M. Cohen, L. J. Lipov- 
sky et all). 
PARATYPES (9M; lOF; IIP; 82L; one in- 
dividual rearing), all collected on Guadalcanal 
as follows: 2L(455) Sally Creek, Doma Cove, 
June 14, 1944 (JNB); 2M, IF, 22L, lP(676-3) 
West Poha swamp, Oct. 16, 1944 (JNB, J. 
Laffoon); 5M, 5F, 4lL, 9P(708-3) West Poha 
swamp, Nov. 1, 1944 (JNB); 1MLP(713-16) i 
same data as holotype and allotype; 5L(816- | 
3) West Poha swamp, Jan. 12, 1945 (M. Co- 
hen, F. B. Wysocki); IM, IF, lL(837-3) 
West Poha swamp, Jan. 20, 1945 (J. J. Cuccio, 
F. B. Wysocki); IM, 91(958-2) West Poha 
swamp, Apr. 28, 1945 (J. J. Cuccio, E. J. [ 
McCormick, V. R. Roa); 2F, lL(K-962) Dec. j 
27, 1943 (K. L. Knight). 
Uranotaenia sexaueri is named in honor of 
