Plecia — Hardy 
195 
Fig. 6. Plecia dimidiata Macquart. a , Ninth sternum; 
b , ninth tergum. 
wings are light-brown fumose. 
Length: Body, 5. 0-6.0 mm.; wings, 4.5- 
6.5 mm. 
Described from Tasmania, known also from 
Australia. The type probably has been lost. 
I have studied a series of specimens from 
both countries in the British Museum (Natural 
History), previously determined by Edwards. 
Plecia disjunct a n. sp. 
Fig. la-c 
An all-black species (males) closely related 
to P. monticola n. sp. and fitting the description 
of that species in all details of the male except 
for the genitalia. It is readily distinguished by 
the development of the lobes of the ninth 
sternum as shown in Figure la and described 
below. 
male. Genitalia : Ninth tergum divided into 
two plates connected at bases by a narrow 
sclerotized line (Fig. 7c). The ninth sternum 
is greatly expanded laterally and extends 
around the sides of the genitalia (Fig. 7b); 
the posterior lateral lobes are comparatively 
broad, rounded at apices, and serrated just 
below apices on inner margins (Fig. la). The 
claspers are slender, attenuated, shaped ap- 
proximately as in monticola. 
Length: Body, 3.0 mm.; wings, 3.8 mm. 
Fig. 7. Plecia disjuncta n. sp. a, Ninth sternum; b, 
genitalia, lateral view; c, ninth tergum. 
