Centistes janzeni 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 : 28-30

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

( Figs 120–126 )

Female. Body length ( Fig. 120 ): 2.7–3.0 mm. Body color: head dark brown except clypeus yellow, and pedicel and scape light brown; mesosoma dark brown except propleura and legs mostly yellow, and pronotum ventrally yellow; wings hyaline; metasoma brown except anterior half of sternum yellow with some brown spots. Head ( Figs 121– 122 ): antenna with 25–26 flagellomeres; flagellar length/width ratios as follows: F1 = 2.2, F10 = 1.2, last flagellomere = 2.0; last flagellomere terminating apically in a sharp point; pedicel as long as wide; scape 1.8 × longer than wide; mandibles when closed overlapping for 0.4 × mandible length; mandible width basally 0.4–0.5 × mandible length; malar space 0.2–0.3 × eye height, and 1.0–1.2 × basal mandible width; gena pubescent, except smooth around eye; shortest distance between eyes 1.1–1.3 × greater than clypeus width; eye in lateral view 1.8– 2.1 × taller than wide; lateral ocellus separated from compound eye by a distance 1.7–1.9 × ocellar width; frons glabrous; vertex with a few scattered setae; temple with few scattered setae; temple width 0.8–0.9 × eye width; occipital carina thick and complete. Mesosoma: pronotum glabrous, laterally mostly smooth, and medially carinate; propleuron with anterior and medial margins rugose, remaining surfaces smooth; median mesonotal lobe anteriorly pubescent, posteriorly glabrous; lateral mesonotal lobes glabrous, except lateral borders pubescent; notauli either absent or only present anteriorly ( Fig. 124 ); pit on mesoscutum absent ( Fig. 124 ); scutellar sulcus bifoveate and having weaker carinae inside each fovea; scutellar disc sparsely pubescent; mesopleuron centrally glabrous, borders and area below precoxal sulcus pubescent; precoxal sulcus shallow, and having irregular surface; metanotum irregularly longitudinally carinated; metapleuron pubescent; propodeum pubescent except dorsum glabrous; propodeum subdivided into anterior and posterior halves by a strong transverse carina, and with a median-longitudinal dorsal carina present ( Fig. 123 ); propodeum surfaces carinate-rugose except smooth areas on dorsum, sometimes with an areola. Legs: hind coxa 1.5 × longer than middle coxa; hind femora length 3.4 × maximum width; hind tibia length 7.2 × longer than maximum width; hind tibial spur 0.7 × as long as hind basitarsus; ratio of hind tarsomeres from basitarsus apically 14:7:6:4:12. Wings: fore wing length 2.6–3.1 mm; pterostigma 3.3 × longer than maximum width; length of marginal cell 2R1 along anterior wing margin 0.9 × the length of pterostigma; vein r-rs 0.3 × 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 0.5–0.6 × as wide as apical width, and 1.3 × longer than apical width; sculpture of first tergite longitudinally costate with costae almost parallel ( Fig. 125 ); spiracle of tergum one situated on lateral margin near to the half of segment; hypopygium short and ventrally convex; ovipositor sheath 2.8–3.0 × longer than basal width, and as long as basitarsus; ovipositor sheath densely pubescent, and terminating in a rounded area ( Fig. 126 ).

Male. Unknown.

Holotype female. COSTA RICA: Guanacaste, Est. Cacao, 1000–1400 m, 1–9.iii.1996, A. Masis leg., L.N.323100–375800#7477, Malaise trap.

Paratypes. COSTA RICA: Eight females, Guanacaste, Est. Cacao 1000–1400 m, 1–9.iii.1996, A. Masis leg., L.N.323100–375800#7477, Malaise trap. One female , Cartago Pr., La Cangreja , 1950 m, i.1992, P. Hanson leg., Malaise. One female , Guanacaste, Sotobosque, W. side, Volcan Cacao , 1100 m, ii.1989, I. Gauld leg., Malaise. One female , Guanacaste, Santa Rosa National Park, 300 m, Malaise trap, site: Bosque San Emilio, Malaise 7, 50 years old, deciduous forest, in clearing, fully insolated part of the day, 7–28.xii.1985, I.D. Gauld & D. Janzen leg.

Comments. Centistes janzeni and C. zurquiensis both lack of any trace of notauli, but C. janzeni has blackdark brown face (yellow face in C. zurquiensis ) and median mesonotal lobe anteriorly densely pubescent (almost glabrous in C. zurquiensis ).

Etymology. This species is named in honor of Dr Daniel Janzen, recognized ecologist who has conducted most of his research in Costa Rica.

Figures

FIGURES 120 – 126. Centistes janzeni sp. n. 120) Lateral habitus, 121) anterior head, 122) dorsal head, 123) propodeum, 124) mesoscutum, 125) dorsal metasoma, 126) small ovipositor sheaths.