Figure 34 in Etudes on iurids, II. Revision of genus Calchas Birula, 1899, with the description of two new species (Scorpiones: Iuridae)

Figure 34: External surface of the chela highlighting trichobothria positional differences in Calchas species. Four specific areas (A–D) are delineated showing major trichobothrial location differences between species C. gruberi as compared to C. birulai and C. nordmanni. A: in C. gruberi trichobothrium eb is placed considerably more distally on finger than in the other two species. B: in C. gruberi the pattern formed by trichobothria Et3–Et5–db essentially forms a straight line with db more distally placed, situated parallel to the finger juncture; in addition, trichobothrium Et4 is located considerably dorsally of Et3. C & D: in C. gruberi trichobothrium Dt and Db are positioned considerably more distally than in the other two species.