464 



me no reason to doubt. Ar. Mouffeti Scop, is probably tbe male to 

 Ar. Solandri Scop. 



Mr Cambridge bas been kind enougb to inform me, that in 

 England the most common form is T. externa L. Koch, but that T. 

 obscura Menge occurs there also. Blackwall's figures appear to me 

 indeed to represent these two forms: fig. 265 a and c, T. Solandri; 

 fig. b and cZ, T. obscura. The true T. externa or T. Nowickii L. 

 Koch can scarcely be wanting in England: Mr Cambridge, to whom 

 I sent a couple of that form, says that he cannot distinguish them 

 ,from T. extensa L. Koch or T. Solandri. 



Of T. Solandri I have specimens from Italy, Germany and the \ 

 more southerly and westerly parts of Sweden (Skane, Smaland, Bo- 

 huslan). Of T. pinicola I captured a couple of specimens at Satra 

 in Westmanland, and I also possess a c? ad. from Niirnberg, fur- 

 nished me by the kindness of Dr L. Koch. T. extensa (Linn.) or T. 

 Noivickii L. Koch seems to be common over the whole of Scandi- 

 navia. Dr Koch has favoured me with a few specimens of this 

 form also (from Galizia). Similarly T. obtusa seems to be met with 

 throughout all Sweden, from Skane to Lappland; I have also speci- 

 mens of it from Austria, which I have received through the kind- 

 ness of Mr L. v. Kempelen. I suppose that, when adult specimens 

 of T. grcenlandia Thor. shall be found, this spider will appear to 

 belong to T. obtusa, or at least to be most nearly allied with 

 that form. 



The "T. extensa" of some among the above-cited authors, for 

 ex. Walckenaer, no doubt includes, besides T. Solandri, one or 

 more of the other forms; but accurately to define which of them, 

 is what I dare not attempt to do. — It appears to me dubious, 

 whether Tetr. rubra Bisso % which Walckenaer takes up under his 

 T. extensa (Ins. Apt , II, p. 205), ought really to be classed under 

 any of the forms before us. — "Eugnathe chrysochlore Sav." 2 ) , which 

 Walckenaer also cites, is according to Audouin an "espece inedite", 

 which had not either been described or figured. In Ins. Apt., IV, 

 p. 478, Walckenaer gives the name Tetragnatha chrysochlora to very 

 young specimens of a Tetragnatha from the vicinity of Paris. — As 

 regards T. striata L. Koch, vid. sup., p. 42. 



1) H. N. d. princip. prod, de l'Eur. merid. , V, p. 168. 



2) Sav. et Aud. , Descr. de PEgypte, 2« Ed., XXII, p. 324. 



