TIIOEELL ON ARANE.E OF COLORADO. 479 



Var. ,3, undulata. — Eyes and palpi of male as in the forma priucip. 

 Cephalotborax dark brownish-jellow, with black margins and the pars 

 cephalica blackish on the sides ; sternum black, with a longitudinal 

 yellowish middle line; abdomen brownish-gray, with a longitudinal, 

 tapering, grayish-white middle band or linesinuated in the margins 

 and geminated by a black line, as also with two large undulated grayish- 

 white bands, one on each side. 



S . — Length of body 9 ?, of cephaloth. 3i ; breadth of same If millim. ; 

 length of mandibles 22, of palpi 4f millim. Legs: I 26f^, II 19J, III 

 10, IV 163; metat. + tars. I 10, pat. -f tib. + metat. + tars. IV lOf 

 millim. 



2 jun.— Length of body 74, of cephaloth. 23, breadth of cephal. 2, 

 length of mandibles nearly 1|, of palpi 3J millim. Legs: I 19J, II 13, 

 III 7, IV 12J- ; metit. + tars. I 72, pat. + tib. + metat. + tars. IV lli 

 millim. 



Var. y, debilis. — Smaller than the former. Interval between the two 

 lateral eyes scarcely less than that between the anterior and posterior 

 central eyes. Tibial joint of the male palpi but little longer than the 

 patellar joint. Sternum often blackish, at least at the sides; abdomen 

 yellowish above, in general with a ramified black middle line, blackish 

 on the sides below ; color for the rest about as in the forma princip. 



$ . — Length of body 5J, of cephaloth. 2, breadth of same nearly 1^ 

 millim. ; length of palpi 2J millim. Legs : 1 17^, II 12, III 5f , IV 11^ ; 

 metat. + tars. I 6^, pat. + tib. 4- metat. + tars. IV 7^^ millim. 



9 jun (?).— Length of body 6|, of cephaloth. 2, breadth of same IJ 

 millim. Legs: I 15, II 9^, III 43, IV 9J millim.; metat. -f tars. I 51, 

 pat. -f tib. + metat. -f- tars. IV nearly Q^ millim. 



The var. y, of which I have seen very many adult males and (young ?) 

 females, appears to me gradually to pass into the principal form, 

 and is therefore probably not a peculiar species, as I at first believed. In 

 the only full-grown male of var. /3 that I have seen, the distance be- 

 tween the first and second teeth of the anterior margin of the claw- 

 furrow is but little greater than that between the second and third teeth. 



The citation from Walckenaer is of course very uncertain, his descrip- 

 tion, like that given by Hentz, being quite insufficient ; but as the species 

 here characterized by me no doubt is the T. (jrallator of Hentz, and this 

 author considers his T. gmllator to be identical with T. elongata Walck., 

 I think I may safely adopt this latter name, which has the priority. T. 

 grallator Keyserl. I consider a tolerably sure synonym, although the 

 specimens described by that author has more teeth on the margins of 

 the mandibles' claw-furrow and longer legs than I have observed in this 

 species; but the number of those teeth, as well as the length of the 

 legs, appear to be pretty variable ; even the relative distances between 

 the eyes, as also those between the teeth of the mandibles' claw-furrow, 

 are not always the same. 



Of T. clonrjafa, which appears to be common in most parts of the United 



