Euriphellus euribates euribates (Stoll, 1782) euribates (Stoll, 1782

Austin, George T., 2008, Hesperiidae of Rondônia, Brazil: Taxonomic comments on “ night ” skippers, with descriptions of new genera and species (Lepidoptera: Eudaminae), Insecta Mundi 2008 (29), pp. 1-36 : 17

Euriphellus euribates euribates (Stoll, 1782) , new combination

( Fig. 44-46, 49 , 112 , 115 , 129 )

Papilio euribates Stoll, 1782

Dyscophellus euribates (Stoll, 1782) : Evans, 1952

Material of E. euribates from Rondônia (male mean FW length = 29.1 mm [27.6-29.8, n = 10]; female mean FW length = 31.3 mm [30.2-32.3, n = 3]) appears typical of the nominotypical subspecies as illustrated in Seitz (1907-1924) as Nascus hesus (Westwood, 1852) and Cock and Alston-Smith (1990). Variation of males includes the extent of the discal tawny color on the dorsal forewing, extending on some individuals prominently distad of the macules; the size of the discal macules; the anteriormost subapical macule that is absent on some individuals; the amount of tawny on the ventral hindwing; and the macules on the ventral hindwing that range from vague to large with variable pale centers. Females vary in the breadth of the forewing macules. The genitalia of males from Rondônia ( Fig. 112 ) are as illustrated by Skinner and Williams (1923, as Nascus hesus ), Lindsey et al. (1931, as N. hesus ), and Evans (1952). Female genitalia ( Fig. 115 ) were described above in the generic description.

Euriphellus euribates is one of the commonest of the dusk-flying skippers in central Rondônia, occurring throughout the year (not recorded in May) with the majority of records from October to December in the early wet season ( Fig. 129 ). The species is wide ranging from Costa Rica south to Bolivia and southern Brazil ( Evans 1952, Cock and Alston-Smith 1990, Murray 1996).

The status of Hesperia polygius Latreille, [1824] , as a subspecies of E. euribates (see Evans 1952), yet needs to be confirmed. Its genitalia, illustrated by Williams and Bell (1934) and Evans (1952), appear to be different from those of E. euribates .

Figures

Figure 38-49. Dyscophellus, Nicephellus, and Euriphellus (from BRAZIL: Rondônia, unless noted otherwise; dorsum and venter of same specimens). 38-39) Dyscophellus sp. (D. diaphorus?) female, COSTA RICA: Alajuela Prov.; Upala Rd., 18.3 km S of Upala, 22 Sep 1987. 40, 43) N. nicephorus female, Fazenda Rancho Grande, 21 Sep 1992. 41-42) N. nicephorus male, Fazenda Rancho Grande, 13 May 1995. 44-45) E. euribates euribates male, Fazenda Rancho Grande, 5 Dec 1991. 46, 49) E. euribates euribates female, Fazenda Rancho Grande, 10 Nov 1995. 47-48) D. mielkei male, Fazenda Rancho Grande, 16 Nov 1994.

Figure 111-114. Male genitalia of Salatis, Euriphellus, Sarmientoia, and Nicephellus (from BRAZIL: Rondônia). Structures shown are lateral, dorsal, and ventral views of tegumen, uncus, gnathos, and associated structures; lateral internal view of right valva; lateral view of aedeagus and associated structures; and ventral view of transtilla and juxta. 111) Salatis salatis (GTA #3487). 112) E. euribates euribates (GTA #1801), including flattened view of caudal end of valva. 113) Sarmientoia similis (GTA #7226), including flattened view of caudal end of valva, lateral view of juxta, and dorsal view of cephalad end of aedeagus. 114) N. nicephorus (GTA #3137), including dorsal and flattened views of caudal end of valva and lateral view of juxta.

Figure 115-116. Female genitalia (ventral view) of Euriphellus and Nicephellus (from BRAZIL: Rondônia). 115) E. euribates euribates (GTA #7221). 116) N. nicephorus (GTA #4309).

Figure 125-130. Phenology of some night skippers from central Rondônia, Brazil. 125-126) Bungalotis species. 127) Dyscophellus species. 128) Salatis salatisand Sarmientoia similis. 129) Nicephellus nicephorus and Euriphellus euribates. 130) Pseudonascus paulliniae and Nascus species.