Heligmothynnus atratus ( Cameron 1911 ) Brown, 2005

Brown, G. R., 2005, A revision of Tachyphron Brown and description of two new genera within the Ariphron group (Hymenoptera: Tiphiidae), Journal of Natural History 39 (2), pp. 197-239 : 210-211

Heligmothynnus atratus ( Cameron 1911) comb. nov.

( Figures 19, 20 , 27 , 59 )

Aelurus atratus Cameron, 1911: 197 .

Tachynomyia atrata: Given, 1954: 53 ; Salter, 1963: 242; Brown, 2001: 35. Tachynomia atrata: Kimsey, 1996: 308 (misspelling).

Thynnus atratus: Kimsey, 1996: 308 (lapsus calami).

Material examined. HOLOTYPE: „. Indonesia: Kepulauan Schouten : Biak (as Bivak) Island, in ZMA.

Distribution. Known only from Biak Island off the northern coast off Irian Jaya ( Figure 59 ).

Diagnosis. Male: gena approximately half length of minimum eye diameter. Forewing with a black preapical spot. Metapleura longitudinally multistriate. Pronotum, tegulae and metanotum without yellow marks. Parameres with dorsal margin sinusoidal, not dentate ( Figure 19 ). Basal section of aedeagus with ventral lobes divergent ( Figure 20 ).

Description. Male: black; small medial spot on metanotum yellow; metasoma dark brown; tegulae brown; wings ‘hyaline, the nervures and stigma black, a fuscous cloud filling the basal half of radial cellule, the 1st cubital between the ‘‘stump’’ of a nervure and the stigma, the 2nd and 3rd cubital cellules, the 2nd discoidal cellule and the part beyond it to near the 2nd recurrent nervure’ ( Cameron, 1911); setae white. Clypeus closely and finely punctate, apically truncate, sagittal carina obscure dorsally. Frons and vertex rugosely punctate. Gena finely punctate, slightly oblique, approximately half length of minimum eye diameter. Occipital carina visible dorsally. Genal cavity visible dorsally. Pronotum including anterior surface rugosely punctate. Mesoscutum rugosely punctate. Mesoscutellum rugosely punctate. Metanotum finely punctate. Propodeum closely and shallowly punctate. Mesopleura finely rugosely punctate. T 1–6 shallowly and sparsely punctate; T 7 closely and coarsely punctate, impunctate medially; T 1 with length: width 2.1:1. S1–8 shallowly and sparsely punctate. Hypopygium ( Figure 27 ) subparallel, lateral spines short, acute not divergent, apical spine subtriangular and as long as lateral spines. Genitalia ( Figures 19, 20 ) with parameres long, narrow and curved over most of length, dorsal margin straight basally, apices strongly down-turned, rounded, not divergent; basiparameres in dorsal view subtriangular, apex emarginate and ending beyond level of apices of cuspides, broad in lateral view; aedeagus with basal and apical sections, basal section short, swollen and hoodlike with a pair of divergent ventral lobes that originate from inside (rather than the margin of) the basal section, apical section missing but presumed to be extremely long, filamentous and coiled, and much longer than length of parameres. BL: 12.

Remarks. The holotype is missing most of the antennae and all wings except the right hind wing which is damaged. Most of the aedeagal coil is also missing.

Figures

Figure 59. Distribution of Deuterothynnus spp. and Heligmothynnus spp. (note the coincident collecting of D. fulvicentratus with H. microspinus, and D. fulvisetatus with D. parallelus).

Figures 17–24. Heligmothynnus spp., male genitalia, lateral and dorsal views. (17, 18) H. microspinus. (19, 20) H. atratus. (21, 22) H. neoaratus. (23, 24) H. sabronensis (note: basal ring not shown). Scale bar: 0.25 mm.

Figures 25–28. Heligmothynnus spp., male hypopygia. (25) H. sabronensis. (26) H. microspinus. (27) H. atratus. (28) H. neoaratus. Scale bar: 0.25 mm.