Descriptions and records of South-East Asiatic Odonata (II)
Author
M. A. Lieftinck
text
Treubia
1940
1940-01-01
17
4
337
392
journal article
10.5281/zenodo.3571116
a02f182b-32e4-4649-afe0-983cb21ceb9e
3571116
Amphicnemis ecornuta
Selys (
fig
15
,
pl 15 fig 3
) - 1889.
SELYS
, Ann. Mus. civ. Genova, 7 (27), p. 482 - 483. --
♂
C- Sumatra (
Fort
de Kock).
1898. Kruger, Stett. ent. Zeitg. 59, p.
123
- 125. - ♂♀ N-E. Sumatra
1913.
LAIDLAW
, P. Z. S. London, p. 74 (key).
1937.
LIEFTINCK
, Treubia, 16, p. 101 (note).
Material studied: -—
1 ♂
(semiad),
holotype
, labelled: Fort de Kock.
Sumatra
,
Wyers
” (yellow, Selys's hand) under drawer-label: "
Amphicnenıis ecornuta
Selys n sp _” (id)
;
1 ♀
(ad); “ Dohrn,
Sumatra
,
Soekaranda
" (printed),
“
Amphicnemis ecornuta
Selys
♀
Sumatra
Kruger
" (Selys's hand). Both specimens in the Brussels Museum.
1 ♂
,
1 ♀
(ad), “ Dohrn,
Sumatra
, Soekaranda ” (♀ allotype), in the Stettin Museum.
—-
1 ♂
(ad.), S.
Sumatra
, Lampong residency, Tandjong Karang,
Kedaton Estate, Wai Rilau
,
150 m
alt.,
March 26, 1937
,
J. VAN DER
Vecht
leg., in the Buitenzorg Museum.
368
TREUBIA DEEL 17, 1940, AFL. 4
.
.
For a detailed description of this magnificent species the reader is referred to Kruger's account.
The ♂ from South Sumatra resembles closely the two other examples, from Fort de Kock and Deli (including the type), with which I have compared it. The type, though fully matured, has obviously been preserved in alcohol and this may largely account for its exceptionally small size; the anal appendages are shrivelled and the colour of the legs has faded to an uniform pale yellow. The only difference which I can make out is that the dorsal anastomosis of the metallic-green juxta-humeral (mesepimeral) fascia (fig. 15) is obliterated in the type. This slight difference I regard as of no importance. The anal appendages of the ♂ differ but slightly from those of
amabilis
,
sp. n.
(
cf
. pl. 15
fig. 2
&
3
).
Fig.15. Colour-pattern of synthorax of Am- phicnemis ecornuta Selys, ♂ (Lampong res., left), and of
A.amabilis
,
sp.n.
♂ (E.Borneo, right).
Measurements of Lampong ♂: abd. + app. 45, hw. 26.5 mm.