Gonatocerus (Gonatocerus) rivalis Girault, 1911

(Figs 51–53)

Gonatocerus rivalis Girault 1911: 257 –261. Holotype female [USNM] (not examined). Type locality: Butler, Montgomery Co., Illinois, USA.

Gonatocerus rivalis Girault: Perkins 1912: 21 (record from Mexico); Huber 1988: 38 –40 (assigned to the sulphuripes species group, diagnosis, redescription, distribution, host associations); Yoshimoto 1990: 41 (list, sulphuripes species group); De Santis & Fidalgo 1994: 125 (catalog).

Lymaenon rivalis (Girault): Burks 1958: 63 (catalog); Peck 1963: 25 (catalog).

Gonatocerus (Gonatocerus) rivalis Girault: De Santis 1979: 366 (catalog).

Material examined. GUATEMALA. SACATEPÉQUEZ, Sumpango, Durwest Farm, 14°40.292’N 90°43.195’W, 5985 ft, 18–24.iv.2008, M.S. Hoddle [1 ♀, UCRC] . MEXICO. CHIAPAS, Ocozocoautla, “ El Kikapu ”, 15–20.viii.1984, G. Gordh [1 ♀, 1 ♂, UCRC] . VERACRUZ: 3 mi. N of Cardel by Río Actopan, 31.x.1982, J.T. Huber, A. González-Hernández [4 ♀, 2 ♂, UCRC] . Fortín de las Flores, 30.x.1982, J.T. Huber, A. González-Hernández [2 ♀, 2 ♂, UCRC] . 33 mi. S of Nautla, 31.x.1982, J.T. Huber, A. González-Hernández [1 ♀, UCRC] . YUCATÁN: Chichén Itzá, 27.vii.1984, G. Gordh [1 ♀, UCRC] . Uxmal, 28.vii.1984, G. Gordh [1 ♀, UCRC] .

Extralimital records. MEXICO. MICHOACÁN, 30 km N of Lázaro Cárdenas, 7.vii.1984, G. Gordh [2 ♀, UCRC] . MORELOS: Amatlán, 14 mi. N of Yautepec, 29.x.1982, J.T. Huber, A. González-Hernández [1 ♀, 2 ♂, UCRC] . Tlayacapan, 29.x.1982, J.T. Huber [4 ♀, UCRC] . NUEVO LEÓN: Municipio Allende, Raíces, Río Ramos: 9.vii.1983, A. González-Hernández [3 ♀, UCRC] ; 9.vii.1983, G. Gordh [1 ♀, UCRC]; 9.vii.1983, F. Reyes-Vélez [2 ♀, UCRC]. Municipio El Carmen, El Carmen, 10.vii.1983, A. González-Hernández [3 ♀, 2 ♂, UCRC] . San Juan, Río San Juan, 14.vii.1983, F. Reyes-Vélez [1 ♀, UCRC] . USA. ILLINOIS: Hardin Co., Shawnee National Forest, ca. 1 mi. E of Cadiz Campground, 37°34’46.6’’N 88°13’59.6’’W, 14.iv.2004, R.A. Rakitov [1 ♀, UCRC] . Marion Co., Centralia, Karlhill Park, 7.ix.1993, J.D. Pinto [1 ♀, UCRC] .

Redescription. See Huber (1988).

Diagnosis. Gonatocerus (Gonatocerus) rivalis is distinguished by the following combination. F6 of female antenna (Fig. 51) without mps and shorter than F5 or F7. Forewing (Fig. 53) 3.7–4.0x as long as wide, often with a more or less distinct brown apical spot; longest marginal seta 0.31–0.36x maximum wing width. Ovipositor (Fig. 52) 1.9–2.1x length of mesotibia and exserted by about 0.2x own length beyond apex of gaster.

Distribution. NEOTROPICAL: Guatemala *, Mexico, and Venezuela (Huber 1988). NEARCTIC: Canada (Huber 1988), Mexico, and USA.

Host. Draeculacephala antica (Walker) (Cicadellidae) (Huber 1988).