AMPHOTERUS: Lay 
base; ocelli rather distant, arranged in an equilateral triangle ; 
pubescence of frons and face rather long. Thorax subquadrate, 
with short pubescence; scutellum semicircular, unarmed, its hind 
border sharp and produced as in Humerus. Abdomen as broad as 
the thorax, with parallel sides; second and third segments almost 
of equal size, fourth more than twice as long as the third. Legs 
short and not robust; hind femora quite simple, neither thickened, 
incurved, dentate, nor spinose; tarsi very thin, not expanded nor 
flattened. Wings with venation very like that of Ewmerus ; no 
cross-vein between the ends of the auxiliary and first longitudinal 
veins; third vein without a stump; siall cross-vein Re beyond 
the middle of the discal cell; apical cross-vein bent in the middle 
as in Humerus, and at this point with a stump directed outwards ; 
lower corners of the subapical and of the discal cells rounded off 
and each bearing a stump; vena spuria distinct; postical cross- 
vein with its upper end exactly on a level with the middle of the 
subapical cell. 
Type: the following new species :— 
127. Amphoterus cribratus, sp. n. 
. Length of the body 10 mm., of the antennz 2°5 mm. 
A ane “fly of a dark ‘colour, with very strongly punctate body, 
simple legs, and long pendulous antenne. 
Head black; the ‘dark hairs on the frons erect; face grey-dusted 
and vellowish-haired ; antennx and arista entirely black ; proboscis 
ve 

Fig. 19.—Amphoterus cribratus,sp.n @. X4. 
black. Thorax and scutellum black, very strongly punctate, with 
short yellowish pubescence, which is a little longer on the anterior 
half of the pleurze. Abdomen black, punctate like the thorax, with 
some pale erect hairs at the base and on the sides: its pubeseence 
is short, vellowish, and denser towards the sides, while at the end of 
the fourth segment it is abundant and almost of a golden colour ; 
