Parapolybia nana Saito-Morooka, Nguyen & Kojima

Saito-Morooka, Fuki, Nguyen, Lien T. P. & Kojima, Jun-Ichi, 2015, Review of the paper wasps of the Parapolybia indica species-group (Hymenoptera: Vespidae, Polistinae) in eastern parts of Asia, Zootaxa 3947 (2), pp. 215-235 : 229-230

Parapolybia nana Saito-Morooka, Nguyen & Kojima , sp. nov.

( Figs 65–69 , 81, 82 )

Parapolybia indica indica (?): van der Vecht 1966: 29, part.

Diagnosis. This species is similar in the external morphology to P. i n di c a and P. c ro c ea sp. nov., but can be easily distinguished from the latters by the female vertex behind the posterior ocelli sloping down to the occipital carina after a narrower flat area.

Type material. HOLOTYPE: ♀, VIETNAM: Mai Chau, Pa Co, Hoa Binh Prov., 20°44.5'N, 104°53.5'E, ca. 1450 m, 27.viii.2006, L.T.P. Nguyen, F. Saito & J. Kojima, nest# VN-Pp- 2006-16 ” [ IUNH, long-term loan from IEBR]. PARATYPES: VIETNAM: Hoa Binh: 7 ♀ with same data as holotype [ IEBR, IUNH].

Description. FEMALE. Body length about 14.0 mm; fore wing length 12.5–14.0 mm. Head in frontal view 1.1 × as wide as high ( Fig. 65 ). Gena barely swollen laterally, in frontal view of head invisible ( Fig. 65 ), in lateral view 0.7 × as wide as eye ( Fig. 66 ). Vertex behind posterior ocelli sloping down to occipital carina after narrow flat area ( Fig. 82 ). Ocelli close to each other ( Fig. 67 ); distance between anterior and posterior ocelli shorter than Od; POD less than their Od; anterior ocellus diameter 0.25 mm, Od 0.20 mm; OOD 2.0 × as large as Od. Propodeum with fine shallow transverse striae in anterior one third, striation stronger and deeper posteriorly. T1 thin and long (about 3.8 mm long, Figs 68–69 ), 3.5 × longer than the maximum height, 3.0 × as long as its own maximum width.

Color. Similar to P. crocea , but ambiguous paired brown spots on clypeus and metasoma distinctly darker ( Fig. 81 ) as follows: segments 2–6 brown to dark brown, with paler colored lateral spots on T2.

MALE. Unknown.

Etymology. The specific name originates from a Latin nanus with reference to the appearance. Distribution. Vietnam (North Vietnam).

Figures

FIGURES 65 – 75. Parapolybia nana sp. nov. and P. albida sp. nov. 65 – 69. P. nana sp. nov., ♀. 65, 66. Head (65. Frontal view, 66. Lateral view). 67. Ocelli, dorsal view. 68, 69. T 1 (68. Lateral view, 69. Dorsal view). 70 – 75. P. albida sp. nov., ♀. 70, 71, 75. Head (70, 75. Frontal view, 71. Lateral view). 72. Ocelli, dorsal view. 73, 74. T 1 (73. Lateral view, 74. Dorsal view). Scale 1 mm.

FIGURES 76 – 84. 76. Parapolybia bioculata. 77. P. fulvinerva. 78. P. takasagona. 79. P. tinctipennis. 80. P. flava sp. nov. 81. P. nana sp. nov. 82. P. nana sp. nov. 83. P. indica. 84. P. crocea sp. nov. 76 – 81. ♀, dorsal view. 82 – 84. Vertex, ♀, dorsal view. An arrow indicating flat area behind ocelli.