456 Annals Entomological Society of America [Vol. VI, 



In the case of the palpal characters I find the same claw, 

 thumb, finger, and sense hair; and each with the same form, 

 relative size, and position as in our species. The thumb also 

 bears the same three bristles; and one of the terminal spines is 

 present. I find difficulty in getting a specimen in the right 

 attitude to show both of the terminal spines properly. 



The females show the structures of the genital and anal areas 

 to be the same as in our species. The plate in front of the vulva 

 is the same, and has the common two bristles. The anal papilla 

 is the same as in our species, and is flanked on each side by two 

 bristles as in our species. These bristles are of the same size, 

 and are situated as in our species. 



In this country Mr. Banks and others have recognized a 

 form which has passed under the name of T. telarius Linn. I 

 have compared our American forms of T. telarius Linn, with 

 our T. bimaculatus Harvey, and I will state that after examining 

 hundreds of specimens of both supposedly distinct species from 

 many States (East, West and Middle) in this country, I can 

 find no structural difference between the two. Mr. Banks, in 

 his "Red Spiders of the United States," represents the thumb 

 of the palpus of T. bimaculatus Harvey as bearing but one distal 

 digit, a long seta, and a basilar spine; the thumb of T. telarius 

 Linn, as bearing three distal digits, two small setae, and no 

 basilar spine. By means of treatment with chloral hydrate 

 solution or other clearing agencies, and by use of magnifications 

 of over 2000 diameters, I find that there are more appendages 

 to the thumb in both cases than Banks has represented. I find 

 in both cases that the palpal thumb bears a large stout digit at 

 its tip, above this two small, diverging spines or digits. Near the 

 base in both cases is the spine which Banks has figured for T. 

 bimaculatus Harvey. Toward the tip of the thumb and below 

 the big finger is a large, curved seta also shown in Banks' figure of 

 T. bimaculatus Harvey. Behind the basilar spine I find in all 

 instances two more prominent bristles not figured in either 

 Bank's drawing of T. bimaculattis Harvey or his drawing of T. 

 telarius Linn.! Also I find that the tarsal claw in both cases is 

 six-cleft instead of being four cleft as stated in Bank's paper! 



There are some other points which I should like to mention 

 in regard to the synonymy of these two species, but for the pres- 

 ent I shall stop with these. 



