196 
PACIFIC SCIENCE, Voi XII, July, 1958 
female: Antennae 7-segmented. Thorax en- 
tirely rufous except for brown markings on 
the pleura; sometimes the mesonotum is ex- 
tensively discolored with brown. Legs, espe- 
cially the femora, tinged with yellow. Ab- 
domen with a rufous tinge on the venter. 
Length: Body, 33 mm.; wings, 4.8 mm. 
Holotype male and allotype female in cop- 
ula from Wisselmeren, Okaitadi, Netherlands 
New Guinea, 1800 m., Aug. 8, 1955 (J. L. 
Gressitt) . Twelve paratypes : 1 cf , 3 9 9, 
same data as type; Id 71 ,! 9, Wisselmeren, 
Waghete, Tigi L., Netherlands New Guinea, 
1700 m., Aug. 17, 1955; 1 9, Wisselmeren, 
Enarotadi, Netherlands New Guinea, 1900 m., 
Aug. 19, 1955 (J. L. Gressitt); 1 9, Wissel- 
meren, Obano, 1770 m., Aug. 9, 1955 (J. L. 
Gressitt); and 2 cfd 71 , 2 $ 9 from Wissel- 
meren, Itouda, Kamo V., 1500 m., Aug. 13, 
1955 (J. L. Gressitt). 
Type, allotype, and 6 paratypes in the 
Bernice P. Bishop Museum. The remainder in 
the U. S. National Museum, the British Mu- 
seum (Natural History), and the University of 
Hawaii collection. 
Plecia dispersa n. name 
Fig. 8a, h 
Penthetria thoracica Guerin-Meneville, 1838, 
in Duperrey, Voy. autour du Monde sur la 
Corvette de la Coquille, 2: 507. Paris. Pre- 
occupied by Laphria thoracica Fabricius, 
1805, System. And., 163, a synonym of 
Plecia collaris (Fabricius). 
Plecia confusa Malloch, 1928, Linn. Soc. N. S. 
Wales, Proc. 53: 605, nec P. confusa Loew. 
New synonym. By comparison of the type 
in the British Museum with specimens of 
P. thoracica Guerin, which had been de- 
termined by F. W. Edwards. 
Plecia mallochi Hardy, 1948, Kans. Ent. Soc. 
Jour. 21: 36. Change of name for P. confusa 
Malloch, preoccupied by P. confusa Loew, 
1858, Berlin. Ent. Ztschr. 2: 109. New 
synonym. 
A moderately large species with the thorax 
all rufous and the ocellar triangle reduced in 
b 
Fig. 8. Plecia dispersa n. name, a, Ninth tergum; b , 
ninth sternum. 
size. It is related to P. javensis Edwards but the 
male genitalia are differently developed; the 
blunt claspers and the differences in the shape 
and development of the ninth sternum and 
tergum (Fig. 8a, b) will readily differentiate 
dispersa. 
The ocellar tirangle is rather inconspicuous, 
about equal in length to about five eye facets 
and about one-third normal size. Antennae 
chiefly brown to black, rufous on basal seg- 
ments; 10-segmented in male and 11-seg- 
mented in female. Ninth tergum of male 
about two times wider than long, with a deep 
rather narrowly U-shaped cleft in the middle 
of the hind margin; the apical lobes of the 
tergum are heavily sclerotized and densely 
haired (Fig. 8a). Ninth sternum of male over 
two times wider than long, narrow through 
the median portion, with the posterior lateral 
margins produced into pointed lobes. Claspers 
about two times longer than wide, blunt and 
