Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 74. (Budapest 1982)

Steinmann, H.: A revision of the genus Ancistrogaster Stal, 1855 (Dermaptera, Forficulidae)

tergite 5 specific, bifurcated (Fig. 14). Male genitalia elongated, virga within genital lobe as in fig. 15 scabiosa sp. n. 18 (17) Inner margins of male forceps with one tooth basally. Lateral spine of abdominal tergite 5 acute. 19 (20) Basal tooth at inner margin of male forceps prominent, almost meeting; branches strongly curved medially, as in fig. 16. Male genitalia not of Ancistrogaster-type, virga within genital lobe straight (Fig. 17) • spinax DOHRN, 1862 20 (19) Basal tooth at inner margin of male forceps small, well separated. 21 (22) 4th abdominal tergite of male with spine very broad, slightly broader than the length of forceps (Fig. 18) arthritica SCUDDER, 1876 22 (21) 4th abdominal tergite of male with spine broad, but the segment shorter than the length of forceps. 23 (24) Male forceps with inner margins trigonal, and the keel of inner margin crenulate ventrally, as in fig. 19, similar to variegata DOHRN, but not oval maculifera (DOHRN, 1865) 24 (23) Male forceps with inner margins normal. 25 (26) Lateral spines of abdominal tergites 4-7 rounded laterally. Male forceps slenderer, apical section as in fig. 20. Male genitalia comparatively narrow, basal vesicle of virga within genital lobe as in fig. 21 mixta BORELLI, 1906 26 (25) Lateral spines of abdominal tergites 4-7 well marked laterally. Male forceps with depressed apical section as in fig. 22. Male genitalia with broad central paramereal plate, virga within genital lobe as in fig. 23 luctuosa STÂL, 1855 Ancistrogaster robusta (BORELLI, 1911) comb. n. (Fig. 1—2) Praos robustus BORELLI, 1911, Boll. Musei Zool. Anat. comp. R. Univ. Torino, 26 (Nu. 644): 5. —Holotype male: Museo ed Istituto di Zoológia Sistematica, Torino (gen. prep. No. 746, det. Dr. H. STEINMANN). Male dark brown, head, pronotum, legs and ultimate tergite a little shining. Head depressed, eyes comparatively large, about as long as the length of head behind eyes. First antennái joint very long, longer than distance between antennái bases. Tegmina abbreviated, wings absent. Forceps (Fig. 1) elongated, slender, inner margins with some small and two prominent teeth, apices of branches depressed, pincers. Genitalia elongated, central parameral plate slightly expanded apically, virga within genital lobe (Fig. 2) long, with sclerotized basal vesicle. External paramere well developed, broad, obtuse. Length of body with forceps: 24-27 mm. Female unknown. Distribution : Costa Rica. Ancistrogaster biolleyi BORELLI, 1907 (Figs. 3-4) Ancistrogaster biolleyi BORELLI, 1907, Boll. Musei Zool. Anat. comp. R. Univ. Torino, 22 (Nu. 574): 1. - Holotype male: Museo edIstituto di Zoológia Sistematica, Torino (gen. prep. No. 742, det. Dr. H. STEINMANN). Male general colour reddish-brown. Head rounded; postfrontal and coronal sutures distinct. Eyes large, but a little shorter than the length of head behind eyes. First antennái joint slightly longer than distance between antenna! bases. Pronotum more or less parallel-sided, posterior margin round-