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

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358 Pacific Insects Vol. 10, no. 2 Fig. 1-7. 1, E. stylata n. sp. lateral view of nodal furrow and membrane; 2, E. Ii neatipes Horvath, elytron; 3, Enithares sp., elytron; 4, E. hungerfordi Brooks, # ventral view of embolium and coxal plate; 5, E. stylata #, Ibid; 6, Enithares sp., lateral view of $ genitalia; 7, E. simplex (Kirby) ibid. Nauk 7 : 206-7 ; 1851a, ibid: 470-72. Body from above convex. Head narrower than pronotum. Eyes large, reniform, 2x sinuate along outer margin and dorsally occupying about 2/3 of head. Inner lateral margins of eyes converging from anterior width of vertex. Ocelli absent. Antennae 4-segmented, arising from behind eyes and lying in trough of pronotal fovea. Rostrum 4-segmented. Pronotum broader than long, lateral margins diverging, anterolateral margins foveate. Scutellum triangular. Clavus and corium coriaceous. Corium with a cleft known as the nodal furrow directed inwards from lateral margins slightly anterior to membranal suture (fig. 1-3). Membrane clearly divided into 2 zones and bilobed (fig. 1-3). Fore and median legs with 3 tarsi, middle tarsus vestigial. Hind leg with 2 tarsi. Two tarsal claws present on all legs. Mid-femur with a pointed anteapical protuberance. Infra-coxal plates bare and fringed
1968 Lansbury : Oriental Enithgres (<strong>Notonectidae</strong>) 359 with hairs. Keel of abdominal venter bare and fringed with hairs along lateral margins. & genitalia : Terminology modified from Truxal (1952). Genital capsule 9th segment which is cleft medianly into an anterior and posterior lobe. Posterior lobe separated dorsally and along upper 1/2 of posterior margin. Parameres symmetrical, directed dorsad, basally inflected into genital chamber through median cleft. Basal plate large, fused ventrally into a ring, lateral arms of basal plate heavily sclerotised, dorsally ring very wide, ventrally narrow. Aedeagus clearly differentiated into a phallosoma and endosoma, the latter with prominent conjunctival appendages. Basal portion of phallosoma narrow and annulated, apically more membranous. Penis valves not visible. The 9th tergum forms a broad bridge across anterior part of 9th segment. The lOth lightly sclerotised, protruding from dorsal margin of anterior lobe of 9th segment (fig. 8). £ genitalia : Terminology follows Scudder (1959). Sternum Vll produced posteriorly, partially covering genitalia. First gonocoxa very roughly triangular, anterior margin more sclerotised than remainder, broadest part covered with long fine hairs. First gonapophysis elongate, sclerotised with stout spines. Gonangulum elongate and sclerotised. Second gonocoxa slender, only very slightly sclerotised. Second ramus heavily sclerotised. Second gonapophysis sclerotised throughout, apically bent ventrad and set with spines. Gonoplacs separate, stylus like with very many long fine hairs. Single median Spermatheca present (fig. 6 & 7). %? KEY TO <strong>ENITHARES</strong> MALES Fig. 8. E. megalops n. sp. lateral view of cT genitalia showing aedeagus partially expanded. 1. Embolium viewed ventrally greatly expanded towards head (fig. 4 & 27) 2 Embolium viewed ventrally not as above (fig. 5) 5 2(1). Apices of clavii clearly raised and roughened with many pits (fig. 12) . stridulata Brooks Apices of clavii not as above 3 3 (2). Nodal furrow clearly more than its own length removed from membranal suture, pronotal humeral angles produced (fig. 15) producta n. sp. Nodal furrow clearly less than its own length removed from membranal suture, pronotal humeral angles not produced 4 4(3). Mid-femoral hairs short (fig. 22); median length of metaxyphus 2x basal width (fig. 30) ; fore femur with triangular eminence ventrally (fig. 25) ...triangularis (Guerin) Mid-femoral hairs long and straggly (fig. 35) ; median length of metaxyphus equaling basal width (jig. 33); fore femur not as above hungerfordi Brooks 5(1). Fore trochanter with a nodule ventrad (fig. 42) hackeri Hungerford Fore trochanter without a nodule ventrad 6
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