263 



1805. Thomisus jejttnus Walck., Tabl. d. Aran., p. 35. 

 ?1830. Philodkomus jejunus id., Faune Franc., Arachn., p. 97. 

 1845. Aetamus jejunus C. Koch, Die Arachn., XII, p. 83, Tab. CCCCXV, 



figg. 1015, 1016. 



As I have already stated in my Eec. crit., I cannot consider 

 Art. jejunus as a different species from Art. margaritatus , as these 

 two forms differ only in the colour, which is very variable in both 

 of them. Aran, margaritatus Cleeck, Ar. levipe.s Linn, and Ar. ti- 

 grina De Geee all beyond a doubt indicate one and the same, here 

 in Upland very common, species, the last name however expressing 

 a variety, which is identical with Art. jejunus (Panz.), C. Koch. 

 Conf. the preceding species, Phil, tigrinns Westr. — Of Phil, pallidus 

 Blackw., or Phil, ambiguus, as Blackwall renamed it after finding 

 that it is not identical with the real Ph. pallidus Walck. (Thorn, 

 grixeus Hahn), Cambridge has favoured me with full-grown English 

 specimens of both sexes. 



The pars femoralis of the palpus in cf is evidently shorter 

 than the patella of the 1 st pair of legs, cylindrical, and almost as 

 thick as the tibia; the pars patellaris is hardly '/ 3 as long, but 

 little slenderer, cylindrical, about half as long again as it is broad; 

 the tibial joint is somewhat slenderer, but equally long and also 

 cylindrical, only somewhat constricted at the apex, and there, on 

 the outer side, furnished with two processes situated close together: 

 the outermost, situated at the apex itself, is straight, somewhat 

 pointed, and has the form of a short conical tooth lying close to 

 the lamina; the other, posited a little lower down, is something 

 longer, of almost uniform thickness, and slightly curved in the form 

 of ani-o, with its point directed a little outwards. The lamina bulbi 

 is somewhat broader than the diameter. of the thighs of the first 

 pair, scarcely longer than it is broad, much dilated inwards, to- 

 wards the base, shortly egg- or pear-formed. The vulva seems to 

 me to have the form of a pretty large, rounded fovea pointed in 

 front, with two small dark points behind (?). — Walckenaer erro- 

 neously states that the 3 rd pair of legs is longer than the 1 st : in both 

 cf and £ of both the forms "levipes" and "tigrinus", the lenghts of 

 the pairs of legs are in the order: 2, 1, 3, 4, the 3 rd and 4 th pairs 

 being however nearly equal. 



Art. margaritatus, as has already been said, varies greatly in 

 colour. The ground is grey, from the lightest shades approaching 

 blue or white, to greyish black. The cephalothorax is sometimes en- 



