;)02 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVllI. 
Abdomen tumid at base, segment 3 constricted, cylindrical thereafter, the 
two last segments slightly dilated ; ore diets robust, with 3-4 robust teeth on the 
free border ; segment 1 olivaceous green as is also the basal half of 2, the apical 
half of latter sky blue, remaining segments pale olivaceous browm with black, 
apical rings. 
Superior anal appendages very long and highly specialized, considerably 
longer than the two last abdominal segments, shaped like the blade of a kukri, 
the edge directed inwards, tapered at base, broad at apex which ends in a sharp, 
outwardly curved point ; inner border with a deep indentation at its middle 
third and a broad, spine-like projection basal to it. The two mdentations, by 
apposition enclose a large fenestration. Inferior appendage less than one-third 
the length of superior, blunt at apex, broad at base. Dark olivaceous brown, 
the inferior paler at its base. 
The edge of the indentation of the superior is raised into a prominent rib which 
is studded with minute, black tubercles from each of which arises a long, brown- 
ish hair. 
This is the first record of any member of the genus Aw pTiiceschna from withm 
Indian limits. 
Genus — Gynacantha, Ramb. 
Gynacantha. Ramb., Ins. Nevr. (1842) ; Selys, Sagra, Hist. Cuba. Ins., p. 459 
(1857) ; Hagen, Neur. N. Amer., p. 31 (1861) ; Kirby, Cat. Odon., p. 94 
(1890); Martin, Cat. CoU. Selys. fas. XIX, XX, p. 167 (1909). 
Aoanthagyna, Kirby, Cat. Odon., p. 94 (1890). 
Selysyophlebia, Forster, Insekten-Bomeo (1904). 
Auslrogynacantha, Tillyard, Proc. Lin. Soc., N.S.W.V., 33 (1908). 
Head large and globular, eyes broadly contiguous, face deep and narrow, 
occiput very small ; wings long and broad, reticulation very close, trigones elon- 
gate, median space entire, submedian and hypertrigones traver.sed, Rs. bifurcat- 
ed, Rspf. widely separated from it so as to enclose 4-7 rows of cells between them, 
stigma usually rather long, membrane short, narrow or obsolete. Abdomen 
long and slender, the 3rd segment usually but not always constricted. Legs 
moderately short, the hind femora usually with a row of gradually lengthening, 
closely-set spines. 
Anal appendages very long and very narrow, sublanceolate, the inferior trian- 
gular, shorter than the superior. 
Dentigerous plate of female formed by a prolongation of the sides of the 10th 
segment, on the end of which are two, robust, long spines, separating like the 
prongs of a hay-fork. 
This genus comprises a large group of dull coloured dragonflies, all crepuscular 
in habits. Their \vings are so thickly studded beneath -with small spines as to 
give them a particular velvety feel analagous to a similar condition foutid 
in the genera Zyxomma and Thohjmis both of which are also crepu.scular in 
habits. The dull colours are in keeping with their nocturnal habits. Most are- 
insects of large size and none can be said to be small. The female deposits its 
eggs in dry or damp earth in the dried up beds of watercourses. From these 
sites the ova are washed down by the first freshet and quickly hatch out. The 
dentigerous plate is peculiarly fitted for this work, serving to steady the end of 
the abdomen whilst the ovipositor is driven into the earth Ijctween the prongs 
of the dentigerous fork. In this act the long anal appendages apparently get 
in the way and are soon fractured off. It is rare to find an old female with en- 
tire anal appendages. 
