Plecia — Hardy 
209 
TYPE LOCALITY: Mt. Mayo, Davao, Philip- 
pine Islands. 
Type in the Museum of Comparative 
Zoology. 
Plecia monticola n. sp. 
Fig. ¥)a-e 
An all black species (males) which along 
with P. disjuncta n. sp. is distinguished from 
other Plecia by the lateral expansion of the 
ninth tergum, which causes the genitalia to be 
wider than long in lateral view. Also the 
cleft of the tergum divides it into two plates 
connected only by a thin sclerotized line at 
their bases. P. monticola is separated from 
disjuncta by the slender pointed lobes at apex 
of the ninth sternum (Fig. 19^). 
male. Head: Antenna black with a tinge of 
reddish brown on the pedicel and at base of 
first flagellar segment; composed of but six 
clearly defined segments, the apical portion 
evidently made of two closely joined seg- 
ments (Fig. 19^). Rostrum about half as long 
as antennae. Ocellar tubercle prominent. 
Thorax: Opaque black, lightly gray pollinose; 
with a faint reddish tinge in the ground color 
of the humeral ridges, the areas to the sides of 
the scutellum, and the metanotum are some- 
times yellow-brown. The halteres are brown 
with brownish-yellow stems. Three distinct 
longitudinal grooves are present on the meso- 
notum. Legs: Entirely black, the tibiae or tarsi 
not swollen. Wings: Dark brown fumose. 
Fork of R s situated at the middle of the dis- 
tance from base of R s to apex of R4+5, the first 
section of R s is about half the length of the 
second. Vein R 2+3 straight entering the costa 
at about an 80 ° angle to R4+5. Cubital cell not 
narrowed at apex. Abdomen and genitalia: Sub- 
opaque black, rather sparsely pilose. Cleft of 
ninth tergum expanded in middle (Fig. 19^), 
on the inner side of each plate of the tergum 
is a set of strong curved bristles along the 
posterior inner margin; the anterior inner mar- 
gin is densely covered with short, stout, black 
bristles, these are visible only from an inner 
view of the genitalia. From a lateral view (Fig. 
Fig. 19. Plecia monticola n. sp. a. Antenna; b, ninth 
sternum; c, genitalia, lateral view; d, ninth sternum; 
e, end view of claspers and accessory structures of 
aedeagus. 
19c), the tergum is greatly expanded around 
the side of the genitalia. The posterior lateral 
lobes of the ninth sternum are about equal in 
length to the remainder of the segment and 
about two times longer than the claspers as 
seen in ventral view (Fig. 19 d). A small sub- 
median lobe lies just inside each clasper and a 
broad moundlike gibbosity is present in mid- 
dle of hind margin of the sternum. From an 
end view the claspers are rather elongate and 
attenuated and a heavily sclerotized comblike 
accessory structure is visible on each side of 
the aedeagus (Fig. 19c). 
Length: Body, 3.0 mm.; wings, 4.0 mm. 
female: Antennae 7-segmented. Humeral 
ridges, sternopleura, hypopleura, metanotum, 
and sides of mesonotum and scutellum tinged 
with rufous. Wings slightly paler fumose. 
Femora reddish brown on the attenuated por- 
tions. Otherwise as in male except for genital 
characters. 
Length: Body, 3.3 mm.; wings, 5.0 mm. 
Holotype male, allotype female, and two 
male paratypes, Mt. Wilhelm, N.E. New 
Guinea, 3000 m., July 4, 1955 ( J. L. Gressitt). 
Type and allotype in Bernice P. Bishop 
Museum. One paratype in the U. S. National 
Museum and one at the University of Hawaii. 
