1877.] 69 [Emerton. 



Hentz approaches equally near to E. quaclrata, some females being 

 only distinguishable by differences in the epigynum. 



Epeira displicata Hentz is related to E. cucurbitina and E. ivest- 

 ringii, but is never colored green, but sometimes, especially in young 

 individuals, red. 



Epeira acalypha of Europe has two North American allies, 

 E. gibberosa and E. placida Hentz. 



Epeira carbonaria of the Alps is closely related to E. packqrdii of 

 Labrador and the White Mountains. 



Epeira sclopetaria and E. palagiata are equally common in both 

 countries, but the latter seems to be more common about houses and 

 less on bushes in America than in Europe. E. cornuta has not been 

 found in America, but is replaced by E. strix Hentz, a species seldom 

 living near houses. E. umbratica is not found in America. 



Zilla x-notata and Sing a heerii are both represented by very close 

 allies, of which only females have been collected. 



Mela menardi is found in caves and damp cellars in Europe, and 

 also in the caves in Kentucky, Indiana and Virginia, and in Maine 

 and Massachusetts. No species are found in America analogous to 

 M. segmentata and M. meriance. 



Epeira conica =z E. caudata Hentz is common in both countries. 



Epeira spinea Hentz is found as far north as Massachusetts, but 

 belongs to a southern group, Acrosoma, not found in Europe. E. 

 rugosa and E. mitrata of Hentz belong to the same group, and are 

 found as far north as Connecticut. 



The genus Tetragnatha, represented in Europe by T. extensa, and 

 several other species of uncertain limits, has in America numerous 

 species as difficult to classify. 



Linyphia marginata =. L. marmorala Hentz, and L. phrygiana — 

 L. conferta Hentz are common in both countries. L. bucculenta and 

 L. socialis are occasionally found in America, and L. hortensis and 

 L. pusilla are represented by allied species. The group to which 

 belongs L. crypticola has numerous species in both countries. Eri- 

 gone viaria is common to both. Erigone alra and E. cristata have 

 been identified by Mr. Cambridge among American spiders. 



Pachygnatha has in America P. tristriata Koch., allied to P. 

 clerckii, but no species have been found resembling the European 

 P. listeri and P. degeerii. 



Eucharia bipunctata, a very common house spider in Europe, is 

 represented in America by Theridwn boreale Hentz, a species so 



