1913.] NATURAL SCIENCES OF PHILADELPHIA. 177 



NOTES ON THE TYPES OF SOME AMERICAN SPIDERS IN EUROPEAN 

 COLLECTIONS. 



BY NATHAN BANKS. 



During a recent trip in Europe, the author had the opportunity 

 to examine the types of a number of our spiders that are in European 

 ■collections. A considerable number of these, especially those de- 

 scribed by Count Keyserling, have been figured, and of these figures 

 are given of only a few, as in most cases we know his species, and the 

 types of most of his Theridiidse, described from the United States, 

 -are in the Marx collection in the U. S. National Museum. Figures 

 -are given of most of the other types that I was able to find, but in 

 some cases where the species is alread}^ well known to American 

 authors, I have not given figures. 



Few synonyms result from the examination, as in most cases the 

 unknown forms were from the western or southern part of the 

 country. 



The Koch material is dry and on pins; the colors of the Attidse 

 are in most cases well preserved, but the structural characters of 

 palpi and vulva can rarely be seen, unless the specimen could be 

 relaxed. However, most of these are readily recognized, as they come 

 from Pennsylvania, the spiders of which are familiar to Eastern 

 •collectors. I have given the notes as they were made, rather than 

 try to interpret, thus giving, others the same chance in using them. 



Species of Keyserling. 

 Xysticus discursans Keys. 



A small male; the sides of the cephalothorax evenly dark, a large 

 ;spot behind (barely divided) a median mark, and in front brownish, 

 with a white band through the eye-region; femur, patella, and tibia 

 ■of legs I and II evenly dark brown, tibia III and IV more maculate. 

 Abdomen very dark, the three bands going across, leaving only 

 narrow white marks. 

 Xysticus limbatus Keys. 



Two females from Texas labelled type; one (fig. a) has legs pale, 

 and a lyre-shaped pale mark on the cephalothorax; the other (fig. b), 

 with more shrunken abdomen, is much darker, and the legs more 

 mottled. 



