Zanchius piperi, Usinger, 1946

Usinger, Robert L., 1946, Hemiptera Heteroptera of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum, Bulletin 189, pp. 11-103 : 77-78

71. Zanchius piperi , new. species ( fig. 20 , c).

Elongate, entirely pale, the upper surface almost entirely impunctate, with scattered, pale hairs. Right genital clasper long, sickle-shaped, angulately bifurcate apically, with inner and outer angles acute.

Head three fourths as long as broad across eyes, 15: 20, eyes half as wide as interocular space, S: 10. Vertex almost imperceptibly longitudinally impressed and faintly impressed on either side near eyes. A feeble transverse carina before hind margin. Rostrum extending well beyond apices of hind coxae; proportion of segments one to four as 12: 11: 15: 14. Antennae longer than body to apex of membrane, 115: 106, proportion of segments 11: 46: 28: 30.

Pronotum shorter than head on median line, 13: 15, twice as broad across humeri as long, the sides relatively straight, only feebly concave at middle and very shallowly broadly concave on hind margin, the front margin distinctly sinuate and minutely margined. Disk swollen anteriorly, distinctly depressed behind callosities.

Mesoscutum and scutellum together relatively short, one fourth broader across base of former than length of two together.

Hemelytra long, the apices of cunei considerably surpassing apex of abdomen. Costal margins of coria over twice as long as width of pronotum, 57:26, gradually arcuate throughout their length, and distinctly widened at apex to form a cell. Cuneus less than one third as long as corium, 17: 57. Clavus, corium, and cuneus subhyaline and only faintly, sparsely punctate.

Right genital clasper long, narrow, and sickle-shaped with the outer apical angle produced into a strong, acute spine and the inner apical angle produced into a short, acute spine. Left clasper relatively simple, sickle-shaped. Processes of aedeagus less prominent than in fragilis but complicated and apparently distinctive.

Color entirely pale testaceous except for brownish eyes and brown apices of male terminalia.

Size: male, length 2.75 mm., width (hemelytra) 0.95 mm.; female, length 2.9 mm., width (hemelytra) 1 mm.

Holotype male, allotype female, and one male paratype, Dededo, May 11, on Piper guahamense, Usinger . A fourth specimen was collected on the same host at Machanao, Aug. 6, Swezey .

Shorter and broader than fragilis with differently proportioned antennae and without the dark antenna! annulations. Right male genital clasper distinctive. The broadened costal margin of corium at apex results in a cell which may be the "cell-like process" mentioned by Distant although details are lacking in his figure (Fauna Brit. India, Rhynch. 2: 477, fig. 309, 1904).

Figures

FIGURE 20.-a, b, Zanchills fragilis: a, dorsal view; b, lateral view of last abdominal segment of male showing the right genital clasper broad basally and narrow and curved apically; c, Zanchius piperi: right genital clasper of male; d, Zanchius virescens: last abdominal segment of male showing the clasper short and simply lobelike.