Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 77. (Budapest 1985)

Steinmann, H.: A revision of the genus Chaetolabia Brindle, 1972 (Dermaptera, Labiidae)

ANNALES HISTORICO-NATURALES MUSEI NATIONAL!S HUNGARICI Tomus 77. Budapest, 1985 p. 121-126. A revision of the genus Chaetolabia Brindle, 1972 (Dermaptera, Labiidae) by H. STEINMANN, Budapest Abstract

—A revision based on the comparative morphological description of male genitalia of the genus Chaetolabia BRINDLE, and descriptions of C. parabola sp. n. (Congo Republic), C. hilaro sp. n. (New Guinea), C. socculata sp. n. (Solomon Islands), C. nebulosa sp. n. (Fiji) and C. venusta sp. n. (Fiji) are given. With 10 figures. In 1972 BRINDLE separated a genus within the subfamily Labiinae in which the male forceps is not strongly setulose and the inner flange is absent. In the male genital apparatusthe virga is straight and the pronotum towards anterior margin clearly narrowing. The species of the genus are distributed in the circumtropical faunal regions. Chaetolabia BRINDLE 1972 Chaetolabia BRINDLE, Insects of Micronesia, 5 (2): 150. — Species typica: Labia esakii MENOZZI, 1941. Intermediate in characters between the genus Paralabella STEINMANN, and the genus Sphingolabis BORMANS. Head transverse or quadrate, tumid; pronotum small, parallel-sided or widened posteriorly. Tegmina and wings normally developed or tegmina short and wings concealed or absent. Forceps of both sexes not strongly setulose. Male genitalia with virga straight, turned basally or simple, distal or genital lobe with or without sclerotized area. Distribution: Aethiopian (with Seychelles), Oriental and Indo-Australian faunal regions. —17 species. IDENTIFICATION KEY TO THE SPECIES 1 (12) Ethiopian species. 2 (7) Male pygidium relatively small; each branch of forceps of female with a basal dorsal tooth, dorsal inner edge not or scarcely dentated. 3 (4) Tegmina short, wings absent or concealed; male pygidium with a posterior tubercle medially; basal dorsal tooth of female forceps smaller montana BRINDLE, 1973 4 (3) Tegmina and wings well or fully developed. 5 (6) Posterior margin of male pygidium concave; each branch of male forceps simple; basal dorsal tooth of female forceps larger delicatula (BRINDLE, 1970) 6 (5) Posterior margin of male pygidium with two small tubercles ; each branch of male forceps (Fig. 1) with a larger inner ventral projection, and a second inner tooth apically; male genitalia as in Fig. 2 parabola sp. n. 7 (2) Male pygidium relatively large; each branch of forceps of female without a basal dorsal tooth but with dorsal inner edge strongly dentated. 8 (9) Each branch of male forceps simple, or with only small teeth; pygidium large but not so strongly transverse ; female pygidium transverse, posterior margin more or less straight bihastata (BORG, 1904) 9 (8) Each branch of male forceps with an inner tooth, or if without the pygidium very strongly transverse; pygidium of female with posterior margin produced.