arT.21. DRAGONFLIES OF BURMA AND LOWER SIAM—LAIDLAW. 15 
The hinder wing of the male is 62 mm. in length, the pterostigma 
is small, about 2.25 mm. long, and is well braced. The gray membra- 
nule is triangular in shape, and extends along one-third of the anal 
triangle. Both fore and hinder wings are tinged with rich brown at 
the base, the color extending as far as the first reinforced antenodal 
nerve in the costal space, and below this as far as the first median 
and submedian cross nerves. The anal area is uncolored. The upper 
lip, the ante and post clypeus are olive-green; the frons is dark brown, 
with a slightly metallic sheen near its apex. The vertex and small 
occiput are black. 
The thorax is of a rich dark-brown color, with large yellow ante- 
humeral bands, and two large yellow bands on either side. 
The abdomen is 67 mm. long, and the upper anal appendages 6.5 
mm. additional. Segments 2-6 are cylindrical, tapering a little from 
before backwards. The auricles are relatively small, armed with four 
or five large teeth. The postjugal part of 7 and the whole of 8, 9, 10 
are broadened, and flattened dorsoventrally. The abdomen as a 
whole is dark brown, the apical segments progressively darker. ‘The 
first segment is marked dorsally with lighter brown, as is the base of 
the second. Segments 2-6 have each an orange-yellow, apical ring, 
a trace of a similar ring showing on the seventh segment. The hin- 
dermost femora are long, reaching nearly the apex of the second seg- 
ment. The female I have examined is teneral, the body and abdomen 
being crushed and broken. The length of the hinder wing is 63 mm. 
In addition to the brown coloring of the wing bases, which is sim- 
ilar to that found in the males, all four wings have a transverse band 
of orange-brown extending across the wing from the nodus to the dis- 
tal end of the pterostigma. Further, the base of the anal area is 
tinged with orange-brown. 
The dentigerous plate is not unlike that of Aeschna, but appears to 
turn upward a little at its apex (possibly due to distortion). It car- 
ries a few small irregularly arranged spines. The anal appendages 
are short cylindrical processes. 
A. grubauerit has been recorded from Malacca, Borneo, and Java. 
AMPHIAESCHNA AMPLA (Rambur). 
The other species of the genus, which is also the genotype, is A. 
ampla (Rambur). It is somewhat smaller than grubaueri, the length 
of the hinder wing being about 56 mm. 
The males have brown markings at the bases of the wings, but are 
without yellow markings on the abdomen; whilst the upper anal 
appendages are without basal, ventral projection found in those of 
grubauert. 
The female has, in addition to the brown of the wing base, a light- 
brown transverse bar across the forewing between the nodus and 
