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The colour ill Blackwall's Ag. montana, according both to the 

 descriptions aud the figures, appears to me to suit Westring's spider 

 now before us better than does the colour of Ag. nava Blackw., nor has 

 Blackwall, as far as I can understand, mentioned any dissimilarity in 

 form between these two species (the statement, that A. nava differs 

 from A. montana in having only two claws on the tarsi, is of course 

 a mistake), and I therefore accepted (loc. cit.) the name H. montana 

 for this spider; but specimens of A. nava, with which I have been 

 favoured by Cambbidge, show that H. pusilla Westb. is identical with 

 the last named species, and not with A. montana. 



As to Hahnia pusilla C. Koch, that species has been made syno- 

 nymous with three different species: by Blackwall with his A. mon- 

 tana, by Westeing and Menge with the H. pusilla of these writers 

 or Ag. nava Blackw., by Ohlebt (Aran. d. Prov. Preuss., p. 86) again 

 with a third species, which I conceive to be the real H. pusilla C. Koch, 

 and therefore entitled to retain this name, although it seems to me 

 probable, that C. Koch had also before him specimens of Ag. nava 

 (e. g. the cT figured by him, fig. 637) Of H. pusilla C. Koch et Ohl., 

 Ohlebt has sent me specimens, among which is a cf ad. This spe- 

 cies is smaller than H. nava (pusilla Westb.) — Koch even says of 

 his H. pusilla, that it is "the smallest species of spider known" — ; 

 its cephalothorax , legs and palpi are of a pale broionish yellow colour, 

 the cephalothorax is without any black side-border, something shorter, 

 but more convex than in H. nava: the abdomen is brown or greyish 

 yellow with small transverse, angular, paler stripes. In H. nava the 

 cephalothorax is dark, greyish brown ivith blackish radiating side spots and 

 a black edge; most of the joints of the legs are dark, paler towards 

 the ends, the abdomen blackish or greyish brown with small transverse, 

 angular, pale stripes, which however sometimes are wanting, espe- 

 cially in cf • In both species the short patellar joint of the male's 

 palpi has on its under side, outwards, a long, slender projection; the 

 still shorter, transverse tibial joint is on the under side , at its extre- 

 mity, drawn out into a long, fine, almost circularly curved spine, 

 and the bulbus is surrounded by a similar, still longer spine, which 

 however often in H. nava is only visible when the palpus is pressed. 

 In H. pusilla C. Koch et Ohl. cf the palpi appear to me shorter than 

 in H. nava; the process on the patellar joint is almost straight, 

 as long as the femoral joint, and directed downwards, with a 

 slight inclination backwards, so that, in the usually curved position 

 of the palpus, it lies parallel with that joint; the clava is visibly 



