Centistes chorotegus 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 : 18-20

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

( Figs 78–84 )

Female. Body length ( Fig. 78 ): 1.8–1.9 mm. Body color: head dark brown except clypeus, pedicel and scape yellow; mesosoma dark brown, except legs and propleuron yellow; wings hyaline; metasoma black-dark brown.

Head ( Figs 79–80 ): antenna with 21 flagellomeres; flagellar length/width ratios as follows: F1 = 3.7, F10 = 2.0, F21 = 2.5; last flagellomere terminating apically in a sharp point; pedicel 1.3 × longer than wide; scape 1.8 × longer than wide; mandibles when closed overlapping for 0.4–0.5 × mandible length; mandible width basally 0.5 × mandible length; malar space 0.3–0.4 × eye height, and equal to basal mandible width; gena sparsely pubescent; shortest distance between eyes equal to clypeus width; eye in lateral view 1.8–1.9 × taller than wide; lateral ocellus separated from compound eye by a distance 1.8 × ocellar width; frons glabrous; vertex with a few scattered setae; temple with few scattered setae; temple width equal to eye width; occipital carina thick and complete. Mesosoma: pronotum glabrous; pronotum in lateral view mostly smooth, medially foveate; propleuron with anterior and medial margins rugose, remaining surface smooth; median mesonotal lobe pubescent anteriorly, glabrous posteriorly; lateral mesonotal lobes mostly glabrous with a single row of setae on lateral border; notauli either absent or only present anteriorly ( Fig. 82 ); pit on mesoscutum absent ( Fig. 82 ); scutellar sulcus with three carinae; scutellar disc pubescent; mesopleuron centrally glabrous, borders and area below precoxal sulcus pubescent; precoxal sulcus foveate; metanotum mostly smooth with few and weak carinae; metapleuron pubescent; propodeum pubescent except dorsum glabrous; propodeum subdivided into anterior and posterior halves by a strong transverse carina, and either with or without a median-longitudinal dorsal carina ( Fig. 81 ); propodeum with surfaces dorsally rugulose, posteriorly smooth-irregular. Legs: hind coxa 1.5 × longer than middle coxa; hind femora length 5.2 × maximum width; hind tibia length 11.7 × longer than maximum width; hind tibial spur 0.5 × as long as hind basitarsus; ratio of hind tarsomeres from basitarsus apically 10:6.5:5:4:6.5. Wings: fore wing length 2.2 mm; pterostigma 3.5–4.1 × longer than maximum width; length of marginal cell 2R1 along anterior wing margin 1.2–1.3 × the length of pterostigma; vein r-rs 0.7 × as long as pterostigma width; vein Rs+M absent; vein m-cu either interstitial or apical with vein RS; hind wing with three sickle-shaped hamuli. Metasoma: first tergite basally 0.7 × as wide as apical width, and 1.6–1.9 × longer than apical width; sculpture of first tergite either longitudinally costate with costae almost parallel or costate-rugulose with costae irregular ( Fig. 83 ); spiracle of tergum one situated on lateral margin near the basal quarter of segment; hypopygium ventrally slightly concave, with a couple of lobe-like protuberances projecting downward ( Fig. 84 ); ovipositor sheath 2.4–3.3 × longer than basal width, and 1.2 × as longer as basitarsus; ovipositor sheath pubescent, and terminating in a rounded area ( Fig. 84 ).

Male. Unknown.

Holotype female. COSTA RICA: San Jose, Cerro de la Muerte , 2 Km W. Empalme, 2300 m, ii.1995, P. Hanson leg., Malaise. Deposited in UWIM.

Paratypes. COSTA RICA: One female, Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, ix.1995, P. Hanson, Malaise. One female , Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, ii–iii.1995, P. Hanson, Malaise. Two females , Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, vii.1996, P. Hanson, Malaise. One female , Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, viii.1996, P. Hanson, Malaise. One female , Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, vii.1995, P. Hanson, Malaise. One female , Cartago, 4 Km N.E. Cañon Génesis II, 2350 m, viii.1995, P. Hanson, Malaise. All paratypes deposited in UWIM.

Comments. Centistes chorotegus and C. bicaudatus share clasper-like structures on the hypopygium, but C. chorotegus can be recognized by the absence of a pit on the mesoscutum (pit present in C. bicaudatus ).

Etymology. This species receives its name for the Chorotega people, an indigenous group inhabiting Costa Rica, Honduras, Nicaragua (Onofrio-grimm 1993).

Figures

FIGURES 78 – 84. Centistes chorotegus sp. n. 78) Lateral habitus, 79) anterior head, 80) dorsal head, 81) propodeum, 82) mesoscutum, 83) dorsal metasoma, 84) apex of metasoma showing apically ovipositor sheaths with ovipositor partly protruding, and ventrally a couple of clasper-like structures.