52 TERTIARY INSECTS OF NORTH AMERICA. 



Parattus, Tetragnatha, and Nephila certainly present an ensemble the indi- 

 cations of which can not be overlooked. (November, 1881.) 



Since the above was written a notable addition to our knowledge of" 

 the Arachnides of Tertiary Europe has been made by Gourret in a paper 

 on those of Aix, in which among others eighteen species of Araneides 

 are described, including EresoidsE (two species), Lycosoidfe (two species), 

 TheraphosoidiB (one species), Dysderides (one species), Hersilioidse (two 

 species), Urocteoidse (two species), Enyoidaj (one species), none of which 

 families had before been found in European rocks, and the last two not 

 even in amber. (October, 1889.) 



In the measurements of legs in the Araneides the length of the femur 

 is the distance of the apex of the femur beyond the margin of the cephalo- 

 thorax, no account being taken of the coxa, unless it is specially mentioned; 

 so too the first joint of the tarsus, which according to arachnologists is con- 

 solidated with the tibia, is here regarded (in the measurements) as a part of 

 the tibia, and the second and third joints of the tarsi are alone measured as 

 tarsi, except when, as in Tethneus hentzii and Thomisus defossus, separate 

 account is taken of them. 



Suborder SALTIGRAD^ Latreille. 



As in the north temperate zone to-day, so in Tertiary times, the two 

 families of Saltigradf^, Attides and Eresoida^, are very unequally represented 

 in species, only two fossil species of the latter family being known against 

 seventeen of the former. The two Eresoidse are amber species; of the Attides, 

 thirteen are known from amber, one from Aix in Provence, and three from 

 Florissant, Colorado, described below. (November, 1881.) 



Since this was written Gourret has described one species of each of 

 these t\Vo families from Aix. 



Family ATTIDES Koch. 



The fossil species of this family of jumping spiders hitherto recorded 

 are all confined to the Prussian amber excepting one, a species referred to 

 a new genus, Attoides, described by Brongniart from Aix. The amber 

 species are referred to four genera, Euophrys (one), Gorgopis (five). Pro- 

 petes (five), and Steneattus (one), besides an undescribed species referred 

 by Menge to Salticus. The species of Gorgopis were formerly referred 

 to Phidippus, a genus richly represented to-day in North America, and it 



