198 
FASCICULI MALATENSES 
The most obvious distinction lies in the colour of the dorsal side of the 
abdomen, which in M. aurantiacus is golden or orange yellow, but in the 
present species, dark brick-red. The dorsal surface of the head is black. 
There are four small yellow spots lying at the angles of a square just in front 
of the anterior ocellus, two others on either side of the two posterior ocelli, 
and two others, more widely separated, behind those on the vertex. 
Prothorax black, with a pair of lateral yellow spots, an anterior yellow line, 
and a posterior yellow median spot. 
Thorax black, the mesothoracic ridge and a pair of narrow antehumeral 
stripes incomplete above, yellow. Humeral stripes reduced to a small yellow 
mark at the upper end of the suture. Two broad lateral stripes on either 
side yellow, the anterior pair interrupted at about its middle, and again near 
its upper end by a projection into it of the black ground-colour. 
Abdomen^ upper surface deep red, articulations black ; under surface 
orange yellow with a broad median stripe, but the whole under-surfaces of 
segments 9-10 is black. Sides of segment i black with a round yellow spot. 
On either side of segments 2-6 is a triangular yellow mark, with its apex 
directed backwards, enclosed within a black border. In segments 2-4 the 
black margin does not quite reach the hinder limit of the segment, whilst in 
segments 5-6 it does so, and the black commences to widen out against the 
articulation. From segments 7-10 the yellow mark is absent, and the black 
now forms a triangle with its apex directed forwards. The sides, beyond the 
triangle in segments 2-4, are yellow. On the dorsal side of segments 2-3, 
near their hinder ends, is a transverse black mark interrupted in the middle. 
Anal appendages black, the upper pair rather long and slender, without 
projections, three times as long as the lower pair, which are rather stouter 
and conical. Legs black, the inner sides of the last two pairs of femora 
whitish distally. 
Wings very narrow and brightly irridescent. No pterostigma on the 
anterior pair, which have 5-6 antenodals. Apical spot longer than it is broad, 
not reaching the hind margin, rather less than one-fifth the length of the wing. 
Pterostigma (of hind wing) black, covering rather more than two cells. 
Length of abdomen, 13 mm. ; hind wing, 15*5 mm. ; apical spot, 
2*75 mm. 
20. Micromerus semiopacus, Selys 
[‘There exist three closely-related forms or “sub-races” living, perhaps, 
separately in Borneo, Sumatra, and the Malay Pensinula, viz., M. semiopacus^ 
Selys (type) in Borneo; M. semiopacus^ Selys, sub-race inartinae^ Karsch in 
