Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Steinmann, H.: A study of the higher taxa of the Chelisochidae (Dermaptera)

Isolabella VERHOEFF 1901 Isolabella VERHOEFF, Sitz. Ges. nat. Fr. Berlin, 1901: 15. — Species typica: Isolabella graeca VERHOEFF, 1901. 1911 Isolabella VERHOEFF; BURR, Genera Insectorum. 122: 67 (position doubtful). 1971 Isolabella VERHOEFF; SAKAI, Derm. Cat. Prael.. VI : 264 (position doubtful). Apterous. Male colour dark brownish black, head black with two spots red at vertex. Forceps of male remote, strongly arched, cylindrical; pygidium large, trapezoidal, scarcely a little longer than broad. Second tarsal joint nearly as long as the third, with no lobe (in the original description; holotype without tarsi). 1901 Isolabella graeca VERHOEFF, Sitz. Ges. nat. Fr. Berlin. 1901: 16. — Terra typica : Greece (Type male: Museum für Naturkunde. Berlin, DDR). 1975 Isolabella graeca VERHOEFF; HARZ and KALTENBACH. The Orthoptera of Europe, 3: 47, fig. 104 (head). 105 (thorax dorsally), 106 (thorac ventrally). 107 (male forceps dorsally). 108 (same, laterally) 109 (epiproct), 110 (male genitalia), 111 (middle tarsus), 112 (tarsus) (identification uncertain). Male colour dark reddish-brownish black. Head large, long and a little wider than broad of pronotum. Postfrontal and coronal sutures distinct. Eyes relatively small, shorter than the length of eyes behind. Antennae 18-jointed; but those of the holotype are broken. First antennái joint large, but short, shorter than the distance between antennái bases; second joint transverse, third long, about more or less as long as scape; fourth joint a little longer than broad. Pronotum transverse, a little shorter than long, median longitudinal furrow well marked; lateral margins parallel-sided, posterior margin straight. Tegmina and wings entirely absent. Mesonotum transverse, of Carcinophora-type. Metanotum typical. Legs relative short, second tarsi nearly as long as third, and without of Chelisochidae or Forficulidae-type lobes; similar to Labiidae-type. Abdomen is broken in the holotype from 5th to 8th abdominal segments. Ultimate tergite (Fig. 1) broad; median longitudinal sulcus very well marked, deep; pygidium trapezoidal, specific. Forceps of Carcinophora-type, cylindrical, strongly curved; without teeth at inner or outer margins; symmetrical. Penultimate sternite (Fig. 2) characteristic, with three specific protuberances. Genitalia (Fig. 3) specific, of Labiidae-type; central parameral plate without genital lobe, but virga present, specific, without basal vesicle; paramere with characteristic spiral crease; external paramere obtuse, but well developed. — Female unknown. — Length of body with forceps: 13.5 mm. Distribution : Greece. Figs 4-6. Genitalata mahajani KAPOOR, 1974, 4 = holotype ultimate tergite and forceps. 5 = penultimate sternite. and 6 = holotype genital armature (after KAPOOR) Isolabella graeca VERHOEFF (Figs 1-3)