Agudus sexmaculatus Linnavuori, 1959

(Figs. 2N–O, 3A–D, 4C–D, 6E–H, 8G)

Agudus sexmaculatus Linnavuori, 1959: 86

Description of female. Length 6.5 mm. Forewing at rest covering abdomen except apex of pygofer in dorsal view. Abdominal sternite VII relatively short, posterior margin shallowly concave with pair of brown angulate submedial projections flanking short, rounded medial lobe.

Material examined. Holotype male, ARGENTINA: Loreto, Misiones, XI-25-1931, AA Ogloblin / USNMENT02110135 [USNM]. Other material: ARGENTINA: Corrientes, P.N. Mburucuyá, 1.8 km W campgd., 80m, 28°1'11"S 58°3'18"W, 8 Jan 2008, C.H.Dietrich, vacuum, AR9-4 (3 males) [MLP, INHS]. PARAGUAY: 95 km W. Pto Pte Stroessner, 11 Jun 1975, Blocker, Elzinga, Granovsky, sweeping (1 male, 1 female) [INHS]; ARGENTINA: Loreto, Misiones, XI-27-1931, AA Ogloblin / Agudus sexmaculatus Lnv. Det. Kramer 1963 (1 male) [USNM]; same locality, XI-29-1931 (1 male) [USNM]; same locality, XII-10-1931 (sex undetermined, abdomen missing) [USNM]. PARAGUAY: Aregua, 20 mi. E of Asuncion, 16 Aug 1980, D.C. Lowrie (1 male) / Agudus sexmaculatus Linnavuori, Det. JN Zahniser 2026 / USNMENT02110346 [USNM].

Notes. This species is recorded from Argentina and Paraguay. The female is here described and illustrated for the first time. Linnavuori (1959) indicated that the type specimen (a male) and one female paratype were deposited at USNM and one specimen (sex not stated) was retained in his personal collection. Upon initial examination of the USNM type collection, the type was not found. However, one male specimen in the main collection in a unit tray identified as A. sexmaculatus was apparently examined by Linnavuori and the genitalia match Linnavuori’s figures. His examination of that specimen is deduced by the preparation of the genitalia which are dismembered and glued to a card, a procedure that was typical of Linnavuori for specimens he examined and illustrated, including types, and was not a technique known to be used by other New World leafhopper workers. Here, the genitalia on the card were imaged and then the parts were lifted off by soaking in water and are now stored in glycerine in a genitalia vial. This male has the locality data (Loreto, Misiones; coll. AA Ogloblin) given by Linnavuori, but the date (XI-25-1931) differs slightly from what was stated for all three specimens (XII-10-1931) in Linnavuori’s publication. Despite this discrepancy, this male is interpreted here as the holotype. There are many other leafhopper specimens at the USNM from the same locality with different dates of collection, and it is possible that Linnavuori incorrectly transcribed the collection dates. The female stated by Linnavuori (1959) to be deposited at USNM was not found, although it is possible the specimen listed in Material Examined (above) with the abdomen missing is this female, and the collection date of that specimen (XII-10-1931) matches that reported by Linnavuori. Linnavuori (1959) stated that males of this species are 5 to 6 mm in length, and that the female he examined was 7.2 mm. However, these measurements seem to be inaccurate. The male type specimen is 4.5 mm, measured from apex of head to forewing apex (forewings surpass the abdomen in this species). The other three males at USNM are 4.5, 5.0, and 5.0 mm long. The specimen with missing abdomen is 5.2 mm.