THE ENITHARES (Hemiptera-Heteroptera: Notonectidae) OF THE ...

386 Pacific Insects Vol. 10, no. 2
Enithares marginata Kirkaldy, 1904, Wien. Ent. Ztg. 23 : 108-109, ex parte, nee. E. marginata
(Fieber) 1851.
6*6* • Length 7 mm, maximum width 2.75 mm; $$, length 7-8 mm, maximum width 3 mm.
Male boat-shaped, £ rather more parallel sided.
Color : Pale form, shining opaque yellowish brown. Dark form, vertex, anterior 1/2 of pronotum
and scutellum yellowish brown, posterior 1/2 of pronotum dark brown. Inner areas of
clavus and corium smudged with black, lateral margins yellowish brown. Both forms with eyes
reddish brown; inner lobe of membrane hyaline ; opaque zone, legs and abdomen ventrally
yellowish brown.
Structural characters : Head in dorsal view rounded (fig. 101). Greatest width of head of #
6/7 pronotal humeral width, of $ 4/5. Head width between 2.25 and 2.50 anterior width of vertex
and about 2>< median head length. Synthlipsis 1/2 anterior width of vertex. Head length
slightly greater than anterior width of vertex and longer than pronotum. Pronotal humeral
width just over 3X median length, lateral margins rounded, posterior margin almost straight.
Dorsal margin of pronotal fovea curving laterad behind eyes. Nodal furrow curved cephalad,
more than its own length removed from membranal suture. Mesotrochanter rounded (fig. 96)
chaetotaxy of tf mid-leg (fig. 96-98). First tarsal segment of the tf mid-leg with a variable
number of black spicules (fig. 97-98). Male genital capsule (fig. 99) very large and ovate;
posterior lobe with a row of stout spines along dorsal margin ; anterior lobe almost as deep
dorso-ventrally as posterior lobe. Parameres broad, almost diamond shaped. Metaxyphus (fig.
100) short, lateral margins convergent.
SPECIMENS EXAMINED : Lectotype $ & paralectotype $. Ostjava, Lamongan-See (Klakah-
See), 240 m, 18.XI.1928 (STOCKHOLM). Java : Bogor Botanical Gardens, small pond with
vegetation, bottom muddy, 23.IV. 1959, B. Pisarksi & J. Proszynski, 26*6* ; Java : Tjibulan,
small pool in rice field, bottom mud, overgrown with grass, 16.IV.1959, Pisarksi & Proszynski,
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