Agryllus hemiapterus Gorochov, 2017

Gorochov, A. V. & He, Zh. - Q., 2017, Review of the cricket genus Agryllus (Orthoptera: Gryllidae, Gryllinae), Far Eastern Entomologist 340 (340), pp. 18-28 : 24-26

Agryllus hemiapterus Gorochov , sp. n.

Figs 5, 6 , 15–17 , 27–29

TYPE MATERIAL. Holotype – ♂, Laos: Champasak Prov., Bolaven Plateau, 14 km SE of Muang Paxong, Ban Houayteuat , 1200 m, 15°4.655ʹN, 106°16.848ʹE, “disturb mountain forest, carrion trap ”, 6. V –14. VI 2008, S. Tarasov ( ZIN) . Paratypes: 1 ♂, 9 ♀, same data as for holotype ( ZIN) .

DESCRIPTION. MALE (holotype). Colouration and structure of body similar to those of

A. excultus and A. magnigenitalis sp. n. but with following differences: head and thoracic tergites as in A. magnigenitalis sp. n. in colouration, but tegmina and abdomen dark brown

(as in holotype of A. excultus ); colouration of legs without orange tinge and with large whitish area on hind femora (as in some specimens of A. excultus with this area largest; Fig. 6 ); thoracic and anterior abdominal tergites shining (almost without pubescence); tegmina almost round, reaching posterior edge of metanotum, not contacting with each other, with 5–6

longitudinal veins in dorsal and 6 such veins in lateral fields ( Fig. 5 ); genitalia with anterior epiphallic lobe (curved upwards-backwards) more or less intermediate between those of A.

excultus and A. magnigenitalis sp. n. in shape, with dorsal projection of posterior epiphallic lobes almost as in A. excultus in width, with notch between these posterior lobes rounded and wider (in anterior part) than in this species ( Figs 15, 16 , 27, 28 ), and with ventral projection of these lobes clearly longer than in A. excultus and forming narrower angular notch between this and dorsal projections in profile ( Figs 17 , 29 ); ectoparameres distinctly larger than in both previous species and with mesal lobes almost as in A. excultus but somewhat larger,

having obtuse (intermediate) anterior apex, and completely separated from ectoparameres by rather narrow membranous areas (in A. magnigenitalis sp. n., such membranous areas wider;

for comparison see Figs 16 and 19 ); endoparameres with median angular structure longer than in these species and having longer median apodeme directed backwards (these structure and apodeme somewhat projected behind anterior edge of epiphallus; Figs 15, 17 , 27, 29 );

rami intermediate between those of A. excultus and A. magnigenitalis sp. n. but without clear medial projections ( Figs 15–17 , 27–29 ).

VARIABILITY. Second male with abdominal tergites blackish, tegmina reaching anterior part of 1st abdominal tergite, and hind femora lacking whitish or light greyish area on outer side but having small whitish area on dorsal side and large one on inner side (latter area occupying most part of proximal half of inner surface).

FEMALE. General appearance as in male including strong variability in colouration of hind femora (some females with intermediate colouration of these femora, i.e. with small and light greyish area on middle portion of outer femoral surface). Abdominal apex almost indistinguishable from that of females of A. excultus and A. magnigenitalis sp. n., but hind femur almost 1.2 times as long as ovipositor ( Fig. 6 ).

MEASUREMENTS (length in mm). Body: ♂ 13–13.5, ♀ 13–14.5; pronotum: ♂ 2.9–3.1,

♀ 3–3.4; tegmina: ♂ 2–2.5, ♀ 2–2.5; hind femora: ♂ 8.8–9.2, ♀ 8.5–10.2; hind tibiae: ♂

6.7–7, ♀ 6.3–7.5; ovipositor 7–8.3.

COMPARISON. The new species is distinguished from the other congeners by the characters given in the key above, and also by some features of the male genitalia: dorsal projections of posterior epiphallic lobes have wider and rounded (not angular) notch between them; ventral projections of these lobes are much longer than in A. magnigenitalis sp. n. and moderately longer than in A. excultus ; median angular part of endoparameres and its apodeme are distinctly longer; and posterior part of rami is more widened than in A. excultus and less widened than in A. magnigenitalis sp. n. (from the latter species, A. hemiapterus sp. n. differs also in the rami without medial projections).

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).