284 Wisconsin Academy of Sciences, Arts, and Letters. 



Illustrations of the palpi and epigyiies of multiformis, hrun- 

 neiis, gcdatJiea (mysfaceus), ruher and morsitans may be found 

 in ILmevtonh Neio England Attidae, PL XVI: of the other 

 species mentioned in this paper, in our North American At- 

 tidae. Plates I and 11. 



The structure of the bulb and tube of the palpus is so similar 

 in califoniicus, Tyrrellii, comatus and variegatus that separate 

 illustrations are not giveoi. 



The species of Phidippus, and especially the females, are ex- 

 ceedingly difficult to identify, and it is possible to do satisfac- 

 tory "^ork only Trhere a large amount of material is accessible. 

 While many of those described by Hentz are comparatively dis- 

 tinct, those of Walckenaer and Koch are frequently variations 

 or immature forms of a single species and must forever remain 

 uncertain. Any one working in this genus must recognize the 

 futility of describing new species without a careful comparison 

 of their relations, illustrated by drawings. We know of no sys- 

 tematic work that is more helpful, in this way, than that of Mr» 

 J. H. Emerton. 



We append a list of the species in our collection, with a key 

 which will be found useful in determining them. 



SPECIES IX OUR collectio:n^. 



Phidippus ardens ne^v, arizonensis P., hardus noAv, calif or- 

 nicus new, comatus new, cardinalis H., carneus P., farneus P., 

 galathea Wlk. (equals mystaceiis H. and alhomaculatus Keys.) 

 Georgii P., Hoivardii P., i7icertus new, insolens H., Johnsonii 

 P., McCoohii P., mexicanus P., miniatus P., montivagus new, 

 morsitans ^Ylh. (equals audax and tripunctatus H.), multifor- 

 mis Tlm..,ohscnriis P., octopunctatus P., opifex McC, otiosus 

 H., princeps P., Putnamii P., Raiderhergii P., rimator Wlk., 

 ruber Keys., rufus H., severus Th. (Megatimus), Tyrellii new, 

 variegatus C. K., Worlcmanii new. 



