CHELIFERID^ MiB GARYPID^ IN THE BRITISH MUSEUM. 81 



similar to that usually found in CJielifh^ Geoff., and consists o£ nine completely- 

 fused rounded teeth, of which the basal is much the longest and distinctly 

 widened out (fig. 57). The Jlagellum is similar to that of Ch. museorum. 

 Leach, but the anterior marginally-serrated hairs are less slender (fig. 57) : 

 the lamina interior has beyond the large plate-shaped portion a single or two 

 scarcely dentated lobes, in addition to the simple spine. The femur of the 

 fourth pair of legs shows no trace of a basal trochantin, but in the first 

 pair we find posteriorly a fairly well-marked basal suture which bounds 

 a triangle, the acute angle of which is one-fourth removed from the base ; 

 this suture is continued anteriorly, and there placed very near to the base ; 

 the whole structure shows a marked similarity to that found in most species 

 of Chelifer. Geoff. 



2. Ideoroncus Cambridgei (//. Koch). (Plate 10. fig. 58.) 



1873. jRoncus Camhridgei, li. Koch, (1) pp. 45-46. 



1879. Obisium luhricum, Simon, (2) pp. 63-64, pi. 18. fig. 22. 



1892. Ronciis Camhridgei, Cambridge, (7) p. 217, pi. B. figs. 9-9 6. 



Of this species I have examined a single female and two young specimens, 

 collected in Argyll (Scotland) and determined by R. Godfrey. I only mention 

 this well-characterized species, which is certainly identical with that originally 

 described by L. Koch from England, on account of the presence of a well- 

 developed galea, a structure hitherto completely overlooked *. The galea 

 is divided into five branches, as shown in the figure (58) ; the serrula 

 exterior., which is free in its distal two-fifths, has at least the distal teeth 

 rounded and dentated, providing similarity to that of Ideobisium crassimanum, 

 Balzan (cf. Hansen, 8. tab. 5. fig. 7) ; the Jiagellum has also a structure 

 completely like that of the species mentioned {cf. 8. tab. 5. fig. 6), consisting 

 of seven slender unilaterally pinnate hairs ; the serrula interior has also 

 a similar structure {cf. 8. tab. v. fig. 6), but its teiQiinal spine is completely 

 fused with the main portion, not placed on a lower level. 



The suhterminal hairs of the legs are not well pronounced, bearing only 

 a few indistinct teeth. The tarsal joints, of which the second is scarcely 

 twice as long as the first, are in the first pair of legs somewhat longer than 

 the tibise, but in the fourth pair much shorter. The articular membrane 

 between the two parts of the femur of the fourth pair of legs, of which the 

 distal is distinctly the longer, is better developed than is usually the case, 

 being somewhat widened out ventrally. 



The presence of a w^ell-developed galea in at least the female of this species, 

 which to all appearance is nearly related to R. lubricus, L. Koch, which has, 

 according to Ellingsen, no galea, makes the value of this character in the 



* This remark is not quite correct, as Mr. H. Wallis Kew, in a private letter received 

 several months after the writing of this passage, says : " I noticed in January 1904 that 

 ' Honcus '' Cambridgei, L. Koch, is an Ideoroncus with a distally toothed galea. . . ." 



