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

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

or larger, sometimes very prominent lateral spines. Ultimate tergite large, penultimate sternite with points or spines at the postero-lateral angles. Forceps subcontiguous, strongly bowed, apically hooked. Male genitalia elongated, a little expanded apically, virga within genital lobe of Ancistrogaster-type, characteristically curved basally, or straight. Distribution : Neotropical Region. IDENTIFICATION KEY TO THE SPECIES 1 (6) Tegmina abbreviated, with posterior margin straight, truncate; wings absent. 2 (5) Sides of abdominal tergites 4-7 with comparatively smaller spines. 3 (4) Male forceps elongated, slender, more or less straight at lateral view; inner margins with some small teeth (Fig.l). Male genitalia a little expanded apically, virga within genital lobe of Ancistrogaster-iypz, characteristically curved apically (Fig. 2) robusta (BORELLI, 1911) 4 (3) Male forceps fully developed, strongly curved at lateral view; inner margins with one large tooth medially (Fig. 3). Male genitalia not of Ancistrogaster-Xype, virga within genital lobe straight (Fig. 4) biolleyi BORELLI, 1907 5 (2) Sides of abdominal tergites 4-7 with large laminated spines. Male forceps oval, inner margins with specific denticulations medially (Fig. 5). Male genitalia characteristic, virga within genital lobe not of Ancistrogaster-Xype, hooked basally (Fig. 6) alfari BORELLI, 1906 6 (1) Tegmina and wings fully developed. 7 (8) Sides of abdominal tergites 4-7 with comparatively small spines, as in fig. 7. Male forceps slender, elongated, inner margins with two small teeth at median section championi BORMANS, 1893 8 (7) Sides of abdominal tergites 4-7 with prominent lateral spines. 9 (10) Lateral spines of abdominal tergites 4-7 very large and broad, as in fig, 8. Male forceps oval, specific; inner margins trigonal, and ventral keel of inner margin crenulate. Male genitalia narrow apically, external parameres moderately small, virga within genital lobe as in fig. 9 variegata (DOHRN, 1865) 10 (9) Lateral spines of abdominal tergites 4-7 large and acute. Male forceps curved at basal or median sections. 11 (16) Male forceps without prominent, but small tooth at inner margins basally. 12 (13) Lateral spines of abdominal tergites 4-7 rounded laterally. Inner margins of male forceps slightly crenulated, as in fig. 10 uncinata (BORELLI, 1915) 13 (12) Lateral spines of abdominal tergites 4-7 straight laterally. Inner margins of male forceps smooth or with very fine serrations. 14 (15) Pronotum slightly longer than broad. Tegmina bicolour, dark brown with humeral patch yellow. Lateral spines of abdominal tergites 4-7 tapering, pointed, as in fig. 11. Male genitalia comparatively large, virga within genital lobe with strongly sclerotized curvature basally (Fig. 12) significans sp. n. 15 (14) Pronotum quadrate, as long as broad. Tegmina unicolour. Lateral spines of abdominal tergites 4-7 broad, laminated, as in fig. 13 mendesi MOREIRA, 1930 16 (11) Male forceps with prominent, but small tooth at inner margins basally. 17 (18) Inner margins of male forceps with two teeth basally. Lateral spines of abdominal