Agryllus excultus Gorochov, 1994

Gorochov, A. V. & He, Zh. - Q., 2017, Review of the cricket genus Agryllus (Orthoptera: Gryllidae, Gryllinae), Far Eastern Entomologist 340 (340), pp. 18-28 : 22-23

Agryllus excultus Gorochov, 1994

Figs 3, 4 , 7–14 , 24–26

MATERIAL EXAMINED. Vietnam: Gia Lai Prov., Thai Nguyen Plateau , ~ 20 km N of

Kannack Town, environs of Buon Luoi Vill., 800 m, primary forest, 3–11.XI 1993, 1 ♂

(holotype), coll. A. Gorochov ( ZIN); Southern Vietnam, 1 ♀ (paratype) ( ZIN); 12 ♂, 9 ♀ ,

same locality as for holotype but 24.III–10. V 1995, A. Gorochov ( ZIN). Most specimens collected on forest floor among dry leaves at night with flashlight; holotype collected as small nymph, with imaginal moult IV 1994 .

REDESCRIPTION. MALE (holotype). Head very dark brown with greyish eyes, whitish ocelli, brown most part of clypeus and mandibles, yellowish labrum (but with brown dorso-

median spot), light brown palpi, and almost yellowish rest of mouthparts; thoracic tergites,

tegmina and abdomen also very dark brown but with wide yellowish transverse band on metanotum; sternites of pro- and mesothorax light brown, but metathoracic sternite almost brown; legs also light brown with hind femora blackish but having light brown apical part,

almost whitish large area on inner proximal and middle parts, light brown to yellowish small proximal outer spot, and brown outer area between latter spot and large whitish or light greyish area ( Figs 3, 4 ). Pronotum and abdominal tergites slightly pubescent. Tegmina reaching posterior part of 2nd abdominal tergite, slightly narrowing to more or less rounded apex, with

6 longitudinal veins in dorsal and 5–6 such veins in lateral fields; all these veins in shape of low keels, and some of them with short additional branches ( Figs 3 , 11 ). Genitalia with anterior epiphallic lobe (curved upwards-backwards) having lateral parts rather wide (long),

and with posterior epiphallic lobes having widely angular notches between them (in dorsal view) and between dorsal and ventral projections of each lobe in profile (dorsal projection approximately 1.5 times as long as ventral one; Figs 7–9 , 24–26 ); mesal lobe not completely separated from ectoparamere and with narrowly angular anterior apex ( Fig. 8 );

endoparameres with median angular structure rather short, not reaching anterior edge of epiphallus ( Figs 7, 9 ); rami almost completely thin and without medial projections ( Figs 7–9 ,

24–26 ).

VARIABILITY. Head, pronotum, tegmina and abdominal tergites often mostly black;

ocelli sometimes yellowish; distal part of maxillary palpi sometimes almost brown; whitish band on hind femur from clearly larger (almost 1.5 times as wide as that in holotype) to distinctly smaller (approximately half of that in holotype); tegmina sometimes reaching anterior part of 3rd abdominal tergite; number of their veins insignificantly varied.

FEMALE. Colouration and structure of body as in male. Hind femur approximately 1.1

times as long as ovipositor; ovipositor light brown, straight and with distal part as in Figs

13, 14.

MEASUREMENTS (length in mm). Body: ♂ 11.5–13.5, ♀ 12–14.5; pronotum: ♂ 3–3.3,

♀ 3.3–3.8; tegmina: ♂ 3.4–3.8, ♀ 3.5–4; hind femora: ♂ 8.5–9.5, ♀ 9.2–10.5; hind tibiae: ♂

6.5–7.2, ♀ 6.7–7.6; ovipositor 8.5–9.3.

n.; 18–20 – A. magnigenitalis sp. n.; 21–23 – A. siam sp. n. Male genitalia from above (7, 15,

18, 21), from below (8, 16, 19, 22) and from side (9, 17, 20, 23); pronotum from side (10);

right tegmen (11); hind femur from side (12); distal part of ovipositor from side (13) and from above (14). ( Figs 7–14 , after Gorochov (1994) with corrections).

Figures

Figs 3–6. Agryllus: 3, 4 – A. excultus Gor., male; 5, 6 – A. hemiapterus sp. n., male (5)

Figs 7–23. Agryllus (schematically): 7–14 – A. excultus Gor.; 15–17 – A. hemiapterus sp.

Figs 24–32. Agryllus, male: 24–26 – A. excultus Gor.; 27–29 – A. hemiapterus sp. n.; 30– 32 – A. magnigenitalis sp. n. Genitalia from above (24, 27, 30), from below (25, 28, 31) and from side (26, 29, 32).