uüi LIBR AB 

 65 \-/:\ 



as most ol Steckers in need of furtlier verification, before il can he acce])tecl. The 

 front margin is either and most often serrated as in Cht. Kayi L. K. and C. dioph- 

 (almiis Dad. (11. Tah. IV, fig. 21), or provided witli a well marked tooth or 

 eminence; this eminence is in C. Wlassicsi Dad. (14. lab. XI, fig. 2) placed in the 

 middle of a notch and terminally provided with a small tooth as well as a pair 

 of long slender hairs, while it in (^li. lerrihilis n. sp. bears several small teeth and 

 a hair on each side (fig. 10, p. 70). The eyes are either present in a number of 

 2 — 4 or are completely wanting. The abdominal tergites as well as the sternites 

 are never longitudinally divided; the hairs are usually pointed (cf. Megathis Steck. 

 4. p. 522, taf. IV, fig. 4) and at least at the tip of the abdomen of C. terrihilis n. sp. 

 are very similar to real tactile hairs, being exceedingly long and slender and 

 placed in wide cavities. The genital area has a very complicated structure, and 

 provides the most surprising differences within the species (cf C. terrihilis n. sp. 

 pi. 1, fig. 1 b and C. Rayi L. K., Menge. 153. tab. Ill, fig. 7 in CJühonius macnlatiis 

 Menge). The stigmata are very different from tliose of Chelifer Geof., bearing simi- 

 larity to those of Ohisiiim C. K. 



The antennae are large, a character which is especially well marked in 

 C terrihilis n. sp. (PI. I, fig. 1 a) in which their size compete with that of Micro- 

 cremjris ijigas Balz. (12. pi. 12, fig. 34 a). The fiagellum consists of pinnate bristles 

 placed in one or two tufts (PI. I, fig. Ic and 49. tab. V, fig. 12 f); they are only 

 simple in Lechytia Balz. The serrulae are free in their distal two thirds and com- 

 ]josed of rather few teeth (PI. I, figs. Ic-d); the galea is represented by a more or 

 less marked little eminence, into which the delicate ducts of the spinning glands 

 discharge. The labrum is provided with a fairly long and slender backwards 

 directed plate-shaped projection (PI. I, flg. 1 e, p), and the maxillae with a large 

 lamina superior and a smaller lamina inferior (PI. I, figs. If— 2 a, Is and // ). The 

 circular lyriform fissure at the ventral surface .seems to be wanting. With regard 

 to the details of the structure I refer to p. 25. 



The slender palps are best characterized by their short calyci-formed tibia, and 

 long and slender fingers, armed with distinct teeth (PI. I, fig. 1 a and fig. 11, p. 71). 

 The hand is almost always provided with one pair of dorsal tactile hairs placed 

 near to the base of the joint as well as to each other (cf PI. I, fig. 1 a and L. Bal- 

 zan's figures 46. tav. XVII, figs. 25 — 27 as well as 12. pi. 12, fig. 35). I am only 

 aware of one exception to this rule, namely Chthonius chtiioniiformis Balz., if this 

 species ought really to be referred to this genus'). 



The coxae are placed on a lower level than the maxillae; they are at least 

 in .some species provided with a remarkable kind of bristles, placed near the inner 

 corner of the coxae of the second and third pair of legs. These hairs were first 

 discovered and described by Tulk (30. ji. 56) in C. orihodactylus Leach and had 



') Balzan describes this species as a Roncus (4(>. p. 445 and tav. .W'll. lig. 24), but the shape of the 

 tibia and his reniarl< "I tarsi dei piedi sono di diif artitoli", arc not in favour of this determination, and 

 sliow, tliat it ouglit to l)e referred to the ('.hllioiiiiniie Dad. Tlie hand bears four tactile hairs at least. 

 U. K. D. \'iciensk. Selsk. Skr., 7. Hække, naturvldensk. og matiieiii. -Mil. Ml. 1. 9 



