154 fitst Annual Report 
Parathalassius melanderi n. sp. 
(Figure 88) 
A small black fly, silvery gray pruinose, with all the bristles white. 
The hypopygium is darker. The vertex is broad and concave, and 
the face below the antennx narrow, broadening again at the gray cly- 
peus. The antenne are dark brown, the first two joints small, the 
terminal arista slender and about twice as long as the third joint 
of the antenne. The lower half of eye covered with fine white 
pubescence. A fringe of bristles around the eye as in P. aldrichi. 
The proboscis is small and blackish. The abdomen has a transverse 
basal row of black pits on each segment. The hypopygium is large 
and globular, the top almost bare, and attached to the left side of 
the body as in P. aldrichi. The legs are slender and covered with 
short white bristles, and with no apical spurs, as in P. aldrichi. Under 
side of front and hind femora with heavy white bristles, the knees 
and tarsi yellow. Halteres whitish. Three conspicuous black pits 
along the lower edge of each abdominal tergite. There are six pairs 
of long dorso-central bristles on the thorax, two scutellar bristles, 
but no pleural or supra-alar bristles. Anal vein not much longer 
than anal cross vein. The ends of the wings are broadly brownish. 
Length 2 mm. 
Two specimens collected at Laguna, on the wet sand at the very 
edge of the surf. 
PHORIDAE 
Trineura velutina Meig. 
Oceasional about decaying kelp. 
PIPUNCULIDAE 
Chalurus spurius Fall. 
SYRPHIDAE 
Nausigaster unimaculatus Twns. 
Paragus tibialis Fall. 
Eristalis tenax L. 
The above four flies are frequent in the vegetation just back of 
beach. 
CONOPIDAE 
Occemyia baroni Will. 
