Comprehensive Description

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 Dimensions (mm): Length with forewings in repose female 6.2, male 5.8, width between humeral angles female 1.8, male 1.6. Head and thorax densely pilose. Head quadrate in anterior view, in dorsal view with two subtriangular projections, longitudinally carinate behind eyes. Forewing (Fig. 9) M and Cu fused at base, 3 m-cu crossveins, 2 r-m veins, R branched into R1-3 and R4+5 basad of fork of vein M. Hindwing (Fig. 10) with 1 r-m crossvein and 1 m-cu crossvein, cubital vein un-branched, anal vein branched. Pro- and mesothoracic legs lacking cucullate setae. Metathoracic tibia with cucullate setae in rows I, II, and III as follows: ca. 20 in row I along entire length; ca. 10 in row III throughout distal half; and fewer than 10, larger cucullate setae in row II irregularly spaced in conjunction with darkly pigmented sections of tibiae (pale row II edge densely pilose but setae without cucullate bases). Abdomen lacking abdominal lamellae, vestiture (see Dietrich 1989) consisting of microtrichia (Fig. 17), as in Microcentrus Stål.  Male (Figs 4–8): Pronotum with small shelf like suprahumeral developments, little more than carinae that do not extend from the pronotal surface (Fig. 4–6). Pygofer and subgenital plates bare, not setose, lacking projections. Styles with base long and subparallel, acute apices recurved laterally (Fig. 7). Aedeagus asymmetrical in dorsal view, lobe of apex curving to the right (Fig. 7); shaft sinuate, directed dorsally then posteriorly, apex expanded (Fig. 8).  Female (Figs 1–3): Resembling male but pronotum with prominent suprahumeral horns, subtriangular, projecting dorsolaterally (Figs 1, 28).  Nymph (Figs 11–16): Fifth instar length 6.2 mm. Densely pilose and dorsoventrally compressed throughout. Head with subtriangular projections directed anteriorly as in adult, in anterior view ventral margin carinate, excavated, with ventrolateral lobes, in lateral view posterolaterally emarginate. Thoracic nota lacking scoli. Forewing ventrally emarginate. Abdominal terga IV-VII with large lateral lamellae directed posterolaterally, smaller on IV and subequal on V-VIII; tergum IX fused ventrally, forming ‘anal tube’, length subequal to remaining terga combined in last instar, as long as remainder of abdomen and thorax combined in earlier instars. Terga III-VIII with 2 pairs of enlarged chalazae, the first near mid line and the second between the first and the abdominal lamellae. Tergum IX slightly wider at base, otherwise parallel-sided, completely fused ventrally. Nascent genitalia barely exceeding posterior limit of tergum VIII lamellae (Fig. 15).


Creative Commons Attribution 3.0 (CC BY 3.0)

© Stuart H. McKamey, Brent V. Brodbeck

Source: ZooKeys

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