MICRODON. 12 
13 (2) Third antennal joint four times as 
long as the fir.t, feathered, clothed 
with long and solt hairs on its iuner 
and outer sides; arista rudimentary, 
represented by a very short stump ; 
eyes very widely separate, without 
prominent anvle in the middie of 
the frens; face with oblique fur- 
rows; ocelli rather distant ; seutellum 
toundedlessibared)., seyspi| . oelareels Ptilobactrum, 
14 (1) Middle croxs-vein situate beyond the 
middle of the discal cell; third 
longitudinal vein without a stun; 
no distinct cross-vein connecting the 
tips of the auxiliary and first veins; 
subapical ercss-vein bent towards 
its middle and there provided with 
an outwardly directed stump ; first 
antennal joint very short, hardly 
visible, the second greatly elongate, 
longer than the third; oce!li dis- 
tant; frons of male contracted 
towards the middie;  scutellum 
rounded ; body cylindrical, strongly 
punctate ; legs almost bare........ Amphoterus, gen, nov. 
gen. noy, 
Grove I. (illucens, sp. n.). 
There is only a single specimen, withouta head ; notwithstanding 
this, I think it better to name it, as it is very strongly differentiated 
and is reminiscent of the American genus My: cogaster, which, 
however, lacks the stump on the third vein. The recently described 
M. acantholepidis, Speiser (1913), perhaps belongs here, but 
seems to have a sessile abdomen. 
129. Microdon illucens, sp. n. 
3. Length of the body (without head) 8 mm. 
A slender elongate species, very distinct owing to the abdomen 
being pedunculate and to the presence of two thin and short but 
well- “developed spines on the scutellum. 
Head wanting. Thorax subquadrate, black, strongly punctate, 
and consequently dull, with very short grey pubescence ; shoulders 
shining yellowish ; pleure towards the middle with a vertical broad 
band of silvery shining thick pubescence; the upper extremity of 
this band emits a small transverse band, which runs along the 
suture and across the back, being interrupted in the mipelien a 
similar but less well-developed band is to be observed in front of 
the scutellum, and before this band is a triangular deep black spot. 
Scutellum strong, convex, rounded behind, punctate and coloured 
like the thorax; the two small, short, yellow spines are placed 
rather low down, and are slightly curved upwards. Metanotum 
aie black. Squamule white, very small, with bare margins ; 
