Kovács I. (szerk.): A Magyar Természettudományi Múzeum évkönyve 78. (Budapest 1986)
Steinmann, H.: Isolabis frater sp. n. (Dermaptera, Carcinophoridae) from Venezuela
ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Tomus 78. Budapest, 1986 p. 71-72. Isolabis fráter sp. n. (Dermaptera, Carcinophoridae) from Venezuela by H. STEINMANN, Budapest Abstract — A new species of earwig (Isolabis frater ) from Venezuela is described and figured, with a key to the two Neotropical Isolabis species. With 3 figures. Isolabis frater sp. n. (Figs 1-2) Male general colour very dark brownish black; antennae and legs brown, but apices of femora and tarsi light brown. Cuticle punctulate, with whitish setae. — Head longer than broad, tumid ; postfrontal and coronal sutures indistinct; posterior margin straight. Eyes large, about as long as the length of head behind eyes, this vertical section with very long setae, latter directed forwards. — Antennae 12-jointed; first joint fully developed, long, longer than the distance between antennái bases; second transverse, and third longer than fourth. — Pronotum well developed, longer than broad, surface with sparse, yellowish hairs; lateral margins of pronotum straight and a little widened posteriorly; posterior margin convex; prozona tumid, metazona flattened. — T e g m i n a and wings entirely absent. Mesonotum narrow, without lateral longitudinal keels. Legs very long. — Abdomen elongate, a little expanded medially; tergites 3-4 with lateral glandular folds. Tergites with deep puncturation. Ultimate tergite smooth, transverse; posterior margin undulate. Penultimate sternite simple, posterior margin broadly rounded medially. Pygidium hidden. Each brach of forceps (Fig. 1) conspicuous, very short, inner margin faintly crenulate. — Genitalia (Fig. 2) characteristic, but of Isolabis-type; central parameral plate very long, narrow, a little widened basally and apically, narrowed medially ; anterior incision between the external parameres comparatively short, genital lobes very long and narrow, virga within genital lobe
