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Aubrey G. Scarbrough1 & Daniel E. Perez-Gelabert2

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Aubrey G. Scarbrough1 & Daniel E. Perez-Gelabert2 Bol. S.E.A., nº 33 (2003) : 41 – 58. OMMATIUS WIEDEMANN (DIPTERA: ASILIDAE) FROM HISPANIOLA: FIVE NEW SPECIES AND A MODIFIED KEY, PHENOLOGY, AND DISTRIBUTION RECORDS OF SPECIES Aubrey G. Scarbrough1 & Daniel E. Perez-Gelabert2 1 Department of Biological Sciences; Towson University. Baltimore, MD. 21252 — [email protected] 2 Department of Systematic Biology, Entomology; National Museum of Natural History. Smithsonian Institution Washington, DC 20560-0169 — [email protected] Abstract: Five new species of Ommatius (bastardoanus sp. nov., elusivus sp. nov., flavescens sp. nov., hierroi sp. nov., and inflatus sp. nov.) and the female of O. pulverius Scarbrough are described from the Dominican Republic. This increases the number of species from Hispaniola to 17. New distribution records are included for O. gwenae Scarbrough, O. hispaniolae Scarbrough, O. lucidatus Scarbrough, O. pulverius Scarbrough, and O. russelli Scarbrough. Illustrations of the terminalia of the five new species, O. russelli, and the female of O. pulverius are included. A modified key to the 17 species from Hispaniola, brief comments on phenology, and distribution of all species are also included. Key words: Diptera, Asilidae, Ommatius, new species, distribution records, Hispaniola. Ommatius Wiedemann (Diptera: Asilidae) de Hispaniola: cinco especies nuevas, clave modificada, fenología y citas Resumen: Se describen, sobre material de la República Dominicana, cinco especies nuevas de Ommatius (bastardoanus sp. nov., elusivus sp. nov., flavescens sp. nov., hierroi sp. nov., e inflatus sp. nov.) y la hembra de O. pulverius Scarbrough. Con ello asciende a 17 el número de especies de Hispaniola. Se incluyen nuevas citas de O. gwenae Scarbrough, O. hispaniolae Scarbrough, O. lucidatus Scarbrough, O. pulverius Scarbrough y O. russelli Scarbrough. Se acompañan, igualmente, ilustraciones de la terminalia de las cinco especies nuevas, de O. russelli y de la hembra de O. pulverius. Se incluye también una clave modificada para las 17 especies de Hispaniola, así como breves comentarios sobre la fenología y distribución de todas las especies. Palabras clave: Diptera, Asilidae, Ommatius, nuevas especies, distribución, Hispaniola. The asilid fauna from Hispaniola is incompletely known all specimens examined. Ratios are expressed as ranges and although biodiversity surveys underway will expand our are determined as follows. Head to face ratio (FHWR)= is knowledge of this and other groups. Martin & Papavero the greatest width of the head divided by the width of the (1970) list 14 species of eight genera from Hispaniola of face at the antennae; flagellar width to length ratio (FWLR) which most were described before 1950. More recently = length of the flagellum divided by its greatest width; (Scarbrough, 1984, 1996, 1997a, 1997b; Scarbrough & width ratios of cell m1 (m1WR)= width of cell at the basal Poinar, 1992), two genera and 18 species were added, 1/3 and apical 2/3 divided by the width of the base of cell increasing the numbers to 10 and 32, respectively. Here we m1; hind femur width to length ratio (HFWLR)= dorsal report five new species of Ommatius from the Dominican length of hind femur divided by greatest width. Data are Republic, females of O. pulverius Scarbrough, and new recorded exactly as they appear on labels. Each line of data distribution records of five previously reported species. The is denoted by a forward slash [/] and a second label by an terminalia of the new species, the female of O. pulverius, ~ symbol. Abbreviations of morphological parts illustrated and both sexes of O. russelli are illustrated. A key to the 17 in different positions are included only once. species, brief comments on the phenology and distribution Acronyms of museums follow Arnett et al. (1993): of species are also included. American Museum of Natural History, New York (AMNH); Carnegie Museum of Natural History, Pittsburgh (CMNH); Florida State Collection of Arthropods, Gaines- Methods and Materials ville, Florida (FSCA); Oxford, University Museum of We follow the general methodology of Scarbrough (1997a, Natural History (UMO); the United States National Mu- 2002) for clearing and dissecting the terminalia and the seum of Natural History, Washington, D. C. (USNM); and morphological terminology of McAlpine (1981). Body and Museo Nacional de Historia Natural de Santo Domingo wing lengths are in millimeters. Descriptions are based on (MHND). 41 Key to the known species of Ommatius Wiedemann from Hispaniola 1. Body slender, with long, thin legs; cell m3 short and black apically; fore and middle femora (%) swollen narrow, base well beyond apex of cell d, contrastingly posteriorly and anteriorly, about same width anteriorly; wider beyond basal 1/4; 3-4 abdominal sternites (%) fore femur (%) with only short, yellowish setae ven- with thin, erect bristles of uniform diameter most of trally; terminalia (%) yellow; spermatheca longer than their lengths [pencil-like], longer bristles straight or wide, ovate; terminalia as in Figs. 30-37......... slightly angular or bent apically, usually sparse in rows ................ inflatus Scarbrough, sp. nov. laterally, sometimes in small groups of 2-5 in apical – Large (13.1-13.7mm) species; basal tarsomere of hind corners; short bristles usually hooked in dense clusters tarsus entirely black; abdomen mostly subshiny, sparse medially; apex of bristles wide, either flat vertically or tomentum present beyond basal 2 tergites; fore and as a flat oval horizontally, or capitate; sternite 8 (&) middle femora mostly or entirely black anteriorly and longer than wide, apical margin with long, vertical, dorsally; fore femur (%) flat, much wider anteriorly fissure medially ...........................2 than long, slender middle femur long and slender; fore – Body robust, with thicker legs; cell m3 long and wide, femur with long, bristly whitish setae ventroapically; base just before to just beyond apex of cell d, cell only terminalia (%) black; spermatheca spherical; terminalia slightly wider beyond basal 1/4; abdominal sternites as in Figs. 9-16.... elusivus Scarbrough, sp. nov. (%) with bristles tapering from base to apex, without 5. Scutellum with marginal bristles; sternite 8 strongly the unusual pattern of thin bristles as above; sternite 8 produced apically, spermatheca pyriform .......6 (&) wider than long, apical margin with a wide, hori- – Scutellum without marginal bristles; sternite 8 slightly zontal, shallow to deep notch medially .........5 to moderately produced apically; spermatheca pyriform 2. Pleuron, metacoxa, and hind coxa entirely brown to or ovate..................................8 black; abdomen with sparse grayish tomentum; basal 6. Flagellum 3 times as long as wide; face, mesonotum, abdominal tergites with narrow lateral margin yello- and scutellum with abundant, long, black setae; thin wish; cell m only slightly wider beyond base; style 1 anepimeral bristle presents; gonostylus unusually long, with setae limited to apical 1/3-1/2; fore femur (%) flat, and wide; aedeagal sheath angled 90o ventrally, normal, not swollen posteriorly ...............3 completely enclosing distiphallus; sternite 8 (&) evenly – Pleuron with narrow posterior below halter, and contoured medially, surface, round, notch absent (see metacoxa, and hind coxa partly yellow; basal abdomi- terminalia, Figs. 21-29, Scarbrough, 1997a) ...... nal tergites with wide lateral margin yellow; cell m 1 ....................... haitiensis Scarbrough much wider beyond base; style with setae extending – Flagellum shorter, only slightly longer than wide; face, from apex to near or base; fore femur (%) swollen mesonotum, and scutellum without unusually abundant posteriorly................................4 long setae, setae either white or yellow; mesonotum 3. Middle tarsus with apical 2-3 tarsomeres entirely with only sparse setae dorsally, most abundant late- black; apical 1/2 of fore femur with 7-8 thick, closely rally; anepimeral bristles absent; sternite 8 (&) na- spaced, black bristles dorsally and short, hooked, rrowly truncate or prominent apical notch present . 7 whitish setae posteriorly; fore tibia with sparse, whi- 7. Face and pleuron white tomentose, only white vestiture tish setae laterally; apical corner of sternite 6 (%) with present; basal 4 abdominal tergites white tomentose, a dense cluster of short, thin, whitish setae, bordered apical tergites brown; flagellum about 1/2 as long as posteriorly with longer, thicker black bristles, both scape; costal margin (%) of wing dilated; apex of hooked apically; sternites 7 with a cluster of long, epandrium angular ventrally, a short, digitate, dorsoa- hooked, black bristles arising for a medioapical tuber- pical process present; gonocoxite with 2 long spine- cle; abdomen (&) sparsely gray tomentose, tergites like processes (see terminalia, Figs. 60-66, Scar- laterally and sternites ventrally with a large, shiny, brough, 1997a); apical margin of sternite 8 (&) obli- black, oval spot; spermatheca ovate; (see terminalia, que, gradually sloped forward, apex narrow, truncate, Figs. 40-49, Scarbrough, 1997a) ............... forming a wide, flat, often yellow, medioapical tuber- ....................... lucidatus Scarbrough cle, margin curled posteriorly, concealing narrow, – Middle tarsus yellowish except narrow black apex of shallow notch; a row of stout, white bristles present; each tarsomere; fore femur posteriorly and fore tibia terminalia as in Figs. 38-40 . pulverius Scarbrough laterally with a fringe of abundant,
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