Centistes achterbergi Aguirre, Almeida & Shaw

Aguirre, Helmuth, Almeida, Luis Felipe Ventura De & Shaw, Scott Richard, 2017, Revision of the genus Centistes (Hymenoptera: Braconidae: Euphorinae: Centistini) of Costa Rica, Zootaxa 4216 (1), pp. 1-46 : 6-8

Centistes achterbergi Aguirre, Almeida & Shaw , sp. n.

( Figs 26–35 )

Female. Body length ( Fig. 26 ): 2.3–2.6 mm. Body color: head dark brown except scape, pedicel and base of gena yellowish and face brown; mesosoma dark brown, except legs and propleuron yellow; wings hyaline; metasoma dark brown except T1 and ovipositor sheath black-dark brown. Head ( Figs 27–28 ): antenna with 24–25 flagellomeres; flagellar length/width ratios as follows: F1 = 3.3, F10 = 2.7. F24 = 2.0; last flagellomere terminating apically in a sharp point; pedicel 1.0–1.2 as long as wide; scape 1.6–1.8 × longer than wide; mandibles when closed overlapping for 0.4–0.6 × mandible length; mandible width basally 0.4–0.5 × mandible length; malar space 0.3–0.4 × eye height, and 1.0–1.5 × basal mandible width; gena sparsely pubescent; shortest distance between eyes equal to clypeus width; eye in lateral view 1.6–1.8 × taller than wide; lateral ocellus separated from compound eye by a distance 1.7–2.4 × ocellar width; frons glabrous; vertex and temple with few scattered setae; temple width 0.8–0.9 × eye width; occipital carina thick and complete. Mesosoma: pronotum glabrous; pronotum laterally smooth, dorsally costate-rugulose; propleuron with anterior and medial margins rugose, remaining areas smooth; median mesonotal lobe anteriorly pubescent, posteriorly glabrous; lateral mesonotal lobes mostly glabrous with a single row of setae on lateral border; notauli either absent or only present anteriorly; pit on mesoscutum small and oval ( Fig. 30 ); scutellar sulcus with one carina; scutellar disc sparsely pubescent; mesopleuron centrally glabrous, borders and area below precoxal sulcus pubescent; precoxal sulcus foveate; metanotum carinated; metapleuron pubescent; propodeum pubescent except dorsum glabrous; propodeum ( Fig. 29 ) subdivided into anterior and posterior halves by a strong transverse carina, and a median-longitudinal dorsal carina present; propodeum surfaces rugose except smooth areas dorsally. Legs: hind coxa 1.2–1.4 × longer than middle coxa; hind femora length 5.1– 5.6 × maximum width; hind tibia length 9.5–12.2 × longer than maximum width; hind tibial spur 0.3–0.4 × as long as hind basitarsus; ratio of hind tarsomeres from basitarsus apically 18:9:8:6:10. Wings: fore wing length 2.4–3.1 mm; pterostigma 3.3–3.8 × longer than maximum width; length of marginal cell 2R1 along anterior wing margin equal to the pterostigma length; vein r-rs 0.3–0.5 × as long as pterostigma width; vein Rs+M present as a short stub; vein m-cu basal with vein RS; hind wing with three sickle-shaped hamuli. Metasoma: first tergite basally 0.6–0.7 × as wide as apical width, and 1.6–1.7 × longer than apical width; first tergite longitudinally costate, with costae almost parallel ( Fig. 31 ); spiracle of tergum one situated on lateral margin near the basal quarter of segment; hypopygium ventrally convex with dorsal margin ranging from angulated to rounded; ovipositor sheath 2.2–3.4 × longer than basal width, and as long as basitarsus; ovipositor sheath densely pubescent, and terminating in a rounded area covered by small setae ( Fig. 32 ).

Male. Body length ( Fig. 33 ): 2.2 mm. Body color: essentially as in female except gena totally dark brown and overall color of face and clypeus darker. Head ( Fig. 34–35 ): antenna with 21–24 flagellomeres; mandible width basally 0.4 × mandible length; malar space 0.4 × eye height; malar space 1.4 × basal mandible width; shortest distance between eyes equal to clypeus width; eye in lateral view 1.8 × taller than wide; lateral ocellus separated from compound eye by a distance 2.2 × ocellar width; temple width equal to eye width. Wings: fore wing length 2.1 mm. Metasoma: parameres brown, narrowing apically, and fringed with setae; aedaegus white, smooth, bilobate, narrowed subapically and expanded apically.

Holotype female. COSTA RICA: San Jose, Cerro de la Muerte , 20 km S. Empalme, 2800 m, vii-ix.1990, P. Hanson leg., Malaise. Deposited in UWIM.

Paratypes. COSTA RICA: On female, San Jose, Zurqui de Moravia , 1600 m, x–xii.1990, P. Hanson leg., Malaise. Deposited in UWIM. One female , San Jose, Cerro de la Muerte , 2 km W. Empalme, 2300 m, ii.1995, P.

Hanson leg., Malaise. Two females, one male, San Jose, Zurqui de Moravia, 1600 m, vii.1990, P. Hanson leg., Malaise. Two females, one male, San Jose, Zurqui de Moravia, 1600 m, ix–x.1990, P. Hanson leg., Malaise. One female, San Jose, Zurqui de Moravia, 1600 m, v.1992, P. Hanson leg., Malaise. One female, San Jose, 26 km N. San Isidro just S of division, 2100 m, ii–iv.1993, P. Hanson leg., Malaise, secondary growth. One female, Cartago, La Cangreja, 1950 m, ix–xii.1992, P. Hanson leg., Malaise. One female, Cartago-San Jose, 20 km S.E. Empalme, 2000 m, viii.1988, P. Hanson leg., Malaise. Two males, San Jose, Zurqui de Moravia, 1600 m, vi.1990, P. Hanson leg., Malaise. Three females, San Jose, Zurqui de Moravia, 1600 m, vi.1992, P. Hanson leg., Malaise. Two females, San Jose, Zurqui de Moravia, 1600 m, vii.1992, P. Hanson leg., Malaise. One female, Cartago, 4 Km, N.E. Cañón Génesis II, 2350 m, ii–iii.1996, P. Hanson leg., Malaise. One female, San Jose, 26 Km, N. San Isidro, just South of Division , 2100 m, viii–ix.1991, P. Hanson leg., Malaise, secondary growth. One female, San Jose, Zurqui de Moravia, 1600 m, x–xii.1990, Paul Hanson leg., Malaise. All paratypes deposited in UWIM .

Comments. Centistes achterbergi resembles C. marshi , but differs from the latter by having yellow stigma and less prominent eyes in dorsal view ( Fig. 28 ).

Etymology. This species is named in honor of Dr Cornelius van Achterberg, prominent and prolific specialist in the study of Braconidae .

Figures

FIGURES 26 – 32. Centistes achterbergi sp. n. 26) Lateral habitus, 27) anterior head, 28) dorsal head, 29) propodeum, 30) mesoscutum, 31) dorsal metasoma, 32) ovipositor sheaths with protruding ovipositor.

FIGURES 33 – 35. Centistes achterbergi sp. n. male. 33) Lateral habitus, 34) anterior head, 35) dorsal head.