Lasiochilus swezeyi, 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 : 54-55

47. Lasiochilus swezeyi , new species.

Small, oblong-oval, with head as broad as long, pronotum strongly rounded at anterior angles, scutellum polished on entire basal half, male genital clasper very broad and flattened apically, one third as wide subapically as long.

Head about as broad as long, the anteocular part as long as an eye and as broad as length of an eye, upper surface smooth, polished, faintly rugose between ocelli; the arcuate impression between eyes obsolescent at middle. Interocular space four times the width of an eye. Tylus feebly, transversely rugose near the base. Disk with hairs much as in marianensis . Rostrum, when stretched out fully, reaching to intermediate coxae, the proportion of segments one to three as 7: 13: 9. Antennae one fourth longer than width of pronotum across humeri, 30:23, first segment reaching apex of head, second distinctly shorter than width of head across eyes, 9: 12, proportion of segments one to four, 5: 9: 8: 8.

Pronotum as long as width of head and almost twice as broad across humeri as long, 23: 12; sides fairly straight on posterior half, broadly, strongly rounded anteriorly. Disk smooth, polished, slightly elevated on anterior half and continuing to hind margin at middle, depressed sublaterally on posterior half, the median elevated area with a distinct longitudinal impression becoming obsolete near anterior and posterior margins. Depressed posterior area transversely rugose. Pubescence short, scattered and inconspicuous except along hind margin and dense but short along lateral margins, with a few very long erect hairs laterally and near anterior angles.

Scutellum broadly smooth and polished on basal half except along extreme lateral margins, elsewhere dull.

Hemelytra not quite reaching tip of abdomen, the clavus, cerium and cuneus impunctate, uniformly clothed with curved, subappressed, backwardly directed hairs. Embolium two thirds as wide at apex as inner cerium at the same level.

Under surface much as in marianensis , but with ostiolar canal bent abruptly backward subapically. Femora swollen as in marianensis . Male genital clasper (described from the male paratype) strongly, lamellately ridged basally and broadened subapically, the greatest width one third the total length, tapering to subangulate apex.

Color brown with ochraceous apex of head, outer basal two thirds of clavus and base and inner two thirds of cerium, apex of scutellum narrowly, first antenna! segment, base and apex of second, and third and fourth segments, rostrum, trochanters, apices of femora, tibiae and tarsi. Coxae and femora fulvous or slightly infuscated.

Size: length, male, 2.13 mm., female, 2 mm.

Holotype male, allotype female, and one male paratype, Mt. Alifan , May 21, under bark of dead breadfruit twigs, Usinger; one specimen, Piti, Oct. 5, in dead breadfruit branches, Swezey.

Differs from marianensis in the broader pale areas of clavus and corium, smaller size, shorter antennae with apical three segments subequal in length, narrower pronotum with different discal sculpturing, apically more strongly dilated male genital clasper, and the large glabrous area on base of scutellum.

A single female, Upi Trail , May 5, under bark, Usinger , agrees structurally with the above description but is much darker with only the extreme bases of coria pale.