Genera of the Familij Attidce. 265 



KEY TO THE GENERA OF THE FAMILY ATTIDAE.' 



1. Eyes in three rows 3 



2 Eyes in four rows 161 



3. -Trochanter I elongated much longer than the others 5 



4. Trochanter I not elongated 13 



5. Trochanter I much longer than coxa, shorter than femur 7 



6. Trochanter I shorter than coxi (especially 2 ), much shorter than 



femur 9 



7. Cephalothorax low; quadrangle of eyes wider than long; tibia I 



slender and parallel ^ I'ara Peckham. 



8. Cephalothorax rather high; quadrangle of eyes almost equal in 



length and breadth; tibia I more or less dilated. . . . Dioleuiiis Tlior. 



9. Quadrangle of eyes much longer than wide, and much longer than 



thoracic part; eyes of second row much nearer lateral than dor- 

 sal eyes Lystrocleisa E. S. 



10. Quadrangle of eyes almost equal in length and brealth; thoracic 



and cephalic parts almost equally long; eyes of second row 

 scarcely further from dorsal than from lateral 11 



11. Legs short; anterior tibia strongly c impressed and dilated, and 



conspicuously furnished below with two rows of strong spines, 

 and in the middle line with thick hairs Discocuemius Tlior. 



12. Legs long; anterior tibia compressed, parallel, not dilate i ; armed 



below with numerous and strong spines in a double row, 



Chalcolecta E. S. 



13. Cephalothorax distinctly wider in the middle than at the ends. 



Ehomhoiiotiis, L. K. 



14. Cephalothorax not distinctly wider in the middle than a^. the 



ends 15 



15. Body slender, autlike; legs weak 17 



16. Body not antlike in form 29 



17. Cephalic part higher than thoracic Salticus Latr. 



18. Cephalic part not higher than thoracic 19 



19. Abdomen with a distinct constriction 21 



20. Abdomen without, or with a very slight constriction 23 



21. Cephalic and thoracic parts separated by a constriction. 



Jaiu'aena Karsch. 



* On account of the vagueness of their definitions, we have been obliged 

 to omit from the Key the genera Phyale, Asaracus, Alcmena, Psecas, ?nd 

 Thiania of C. Koch, and Lycidas, Ligurinus, and Maratus Knrsch. 



-We have here made use of the table liiven by M. Simon in his i\o^e 

 sur le Groujye dps Diolenii. This group, so far as is yet known, is confined 

 to Australian and Malesian islands. 



'"Tara = Atrytone Keyserling, preoccupied. 



