Heteromeringia flavifrons HENNIG, 1938

Lonsdale, Owen & Marshall, Stephen A., 2007, Revision of the New World Heteromeringia (Diptera: Clusiidae: Clusiodinae), Beiträge Zur Entomologie = Contributions to Entomology 57 (1), pp. 37-80 : 56-57

Heteromeringia flavifrons HENNIG, 1938

( Figs 5, 6 , 36-38 , 49 , 61 , Map 5 )

Heteromeringia flavifronsflavifrons HENNIG, 1938: 134 .

Description ( Figs 5, 6 , 61 )

Male

Body length 3.6-4.0 mm. Bristles black. Two dorsocentrals plus one minute bristle in front of anterior dorsocentral. Ocellar bristle relatively long and well-developed. Four fronto-orbital bristles with anterior reclinate bristle half length of remaining reclinate bristles. Anterior genal bristle vibrissa-like. Arista short pubescent. Scutum yellow with brown postpronotum (faded in most specimens) and light central postsutural stripe (narrowing anteriorly or strongly faded, sometimes reduced to basal spots); holotype with notopleuron also brown and notal stripe reduced to two ill-defined basal spots. Scutellum and laterotergites brown (light brown below lateral margins of scutellum). Pleuron and legs yellow with brown subnotal stripe; sometimes tarsomeres 2-5 brown on fore tarsi, and mid and hind tarsi with distal segments dirty yellow. Head yellow with anterior half of first flagellomere brown in specimens from Costa Rica, gena and face light brown to dirty white and ocellar spot brown; face and anterior half of frons pilose; upper 3/5 of gena silvery tomentose; INBC male with one pair of median brown stripes on posterior 3/4 of frons that do not touch posterior margin (notal stripe also faded). South American males with pigment on thorax much lighter and antenna more orange. Abdomen black. Wing darkly clouded along distal half of R 2 2+3 and lightly clouded along distal half of R 4 +54+5; holotype with distal half of wing more darkly

infuscated. M

1+2

ratio 5.8-6.0.

Male terminalia ( Figs 36-38 )

Epandrial length 3/5 height and width and height subequal. Cerci slightly more than half height of epandrium and rounded apically with medial emargination. Surstylus thin (laterally compressed), circular in outline, 2/3 length of epandrium and inner face densely setose (bristles on

distal half stout and pointed). Hypandrial complex as described for H. czernyi except hypandrium + pregonite without anterior projection, phallapodeme absent (or missing from dissected specimen), and distiphallus with one distal quadrate projection on left rib.

Female

Externally as described for male except as follows: notum reddish; notal stripe sometimes dark and well defined or entirely absent; frons brownish on posterior 2/3.

Female terminalia ( Fig. 49 )

Spermatheca cylindrical, clavate, as long as sternite 6 and widest subapically; apex thinner, round- ed, more heavily sclerotized and covered with minute bumps. Spermathecal duct weakly sclerotized; half as wide as spermatheca and 2/3 as long. Ventral receptacle as described for H. czernyi .

Distribution

Bolivia, Brazil (Santa Catarina), Costa Rica, Ecuador, Honduras ( Map 5 ).

Holotype: BOLIVIA. Mapiri, S. Carlos, 800m, i.1903, Garlepp (1 , SMTD).

Additional material examined: BRAZIL. Nova Teutonia , 27°11'S, 52°23'W, 300-500m, F. Plaumann , x.1944 (3  1 , CNCI) . COSTA RICA. Alajuela: Upala dos Rios, Estacion San Gerrardo, 600m , 10.viii.2001, Trampa Malaise, D. Briceno (1 , INBC) , 20km S Upala , F.D. Parker , 1-9.v.1991 (1 , EMUS) , 20-26.iii.1991 (1 , EMUS) , 8-10.v.1990 (1 , EMUS) , Guanacaste: Est. Cacao , Iado SO Vol. Cacao, P.N. Guanacaste, 800-1600m , 12-17.vii.1993, M. Reyes (1 , INBC) , 3km SE R. Naranjo, F.D. Parker , 18-28.iv.1993 (1 , EMUS) , 8-12.vi.1993 (1 , EMUS) , v.1992 (1  1 , EMUS) , 18-28.iv.1993 (2 , EMUS) , 1-10.xii.1992 (1 , EMUS) , Cacao Field Stn. , 1000m, carrion traps , 18-20.ii.1995, S.A. Marshall (1 , DEBU; 1 , INBC), Puntarenas: Monteverde Biol. Res. , 1500m, on dung , 12.vi.2000, S.A. Marshall (1 , DEBU) , Las Alturas , tree fall, 2000m , 15.viii.1995, S.A. Marshall (1 , INBC) . ECUADOR. Rio Frio , Balao, Chico, Guayas , 26- 30.iv.1963, L. Pena (1 , CNCI) . HONDURAS. Cortés, Parque Nacional Cusuco , 5km N Buenos Aires, 15°29'N, 88°13'W , 30.ix.1995, R. Cave , Malaise trap in oak/pine forest (1 , UZMD) .

Comments

Heteromeringia flavifrons resembles other pale Heteromeringia with four fronto-orbitals, but the hairs on the arista are longer, the antenna and postpronotum are darker and the scutum sometimes has a posteromedial stripe.

Figures

Map 5: Distributions of species in the Heteromeringia czernyi species group excluding H. czernyi KERTESZ. Legend: H. flavipes ((WILLIST WILLISTON), circle; H. flavifrons HENNIG, dot.

Figs 2-7: Dorsal colouration, head and thorax. 2 H. quadriseta sp. n., male; 3 H. medianamediana sp. n., male; 4 H. decora sp. n., female; 5-6 H. flavifronsflavifrons HENNIG, female; 7 H. lateralis sp. n., female.

Figs 36-38: Heteromeringia flavifrons HENNIG, genitalia. 36 internal, left lateral; 37 external, left lateral; 38 external, posterior. Phallapodeme missing from dissected specimen.

Figs 48-50: Female internal genitalia (spermathecae and ventral receptacle). 48 Heteromeringia czernyi KERTESZ; 49 H. flavifronsflavifrons HENNIG; 50 H. lateralis sp. n.

Figs 54-63: wings; 54: Heteromeringia fucata HENDEL, 1936, female; 55: H. nitida JOHNSON, 1913, female; 56: H. nervosanervosa sp. n., male; 57: H. fumipennis MELANDERMELANDER & ARGO, 1924, female; 58: H. decoradecora sp. n., female; 59: H. czernyi KERTESZ, 1903, female; 60: H. lateralislateralis sp. n., female; 61: H. flavifrons HENNIG, 1938, female; 62: H. quadriseta sp. n., male; 63: H. medianamediana sp. n., male.