Genera of the Familt/ Attidce. 2G1 



family, we shall be very glad to receive Attidae from any 

 part of the world, and to send in return spiders of the 

 United States. 

 We give below a brief account of the Attid genera. 



Milicankee, Wisconsin. McorJt, 18S4. 



THE ATTID GE^fERA. 



From Latreille to Walckener, inclusively, the whole fam- 

 ily constitutes but one g-enus, Salticus Latr. or Attus Walck. 

 In 1832 Hentz detached the genera Lyssomanes, Synemosyna, 

 and Epiblemum; Lyssomanes having the eyes in four rows; 

 Sjaiemosyna corresponding in part to Salticus (Latr.) C. 

 Koch, or LeDtorchestes Thorell, 1870; and Epiblemum in 

 part to Calliethera C. Koch, 1837. In 1833 Sundevall divided 

 'Attus Walck. into two genera, Salticus and Attus. Salticus 

 having the cephalic abruptly higher than the thoracic parfc^ 

 and the quadrangle of the eyes nearly square. Between 

 1833 and 1850 twenty-four genera were formed by C. Koch, 

 most of which were so poorly defined by their author that 

 their identification has been difficult or impossible. These 

 genera, however, have been used as a basis of work by later 

 authors who have redefined and united them, so that eighteen 

 out of Koch's twenty-four genera are still used, beside 

 some of his sub-genera which have been raised to the rank 

 of genera by Thorell. A short history of C. Koch's genera 

 would run as follows: Heliophanus, 1833; Euophrys, 1834; 

 Dendryphantes, 1837; Pyrophorus, 1837; (the name Pyro- 

 phorus had already been used, and the genus was identical 

 with Salticus (Latr.) Sund., 1833); Toxeus, 1846; (probably 

 also included in Salticus (Latr.) Sund.; Janus, 1846; (the 

 name Jaiius was preoccupied; the genus is in part Synemo- 

 syna Hentz, 1832, and in part Janigena Karsch, 1880); 

 Philia, 184G, (the name Philia was preoccupied, and for it 

 Thorell substituted, Phiheas in 1870): Hyllus, 1840; (identi- 

 cal with Dineresus AMiite, formed in the same year) ; Thiania, 

 1846; Marpissa, 1846; (the name Marpissa was preoccupied; 



