Order Araneida 



AA. With only one pair of book-lungs. 



B. With a cribellum and a calamistrum. 

 C. Eyes all dark in colour; lateral eyes on each side farther 

 apart than the two pairs of median eyes; posterior 

 metatarsi armed below with spines which are usually 

 arranged serially. 

 D. Posterior median eyes very large. P. 273. 



Deinopid^e 

 DD. Posterior median eyes of moderate size. P. 262. 



Uloborid^e 

 CC. Some of the eyes pearly white; posterior metatarsi not 

 armed below with a series of spines. 

 D. Anterior median and posterior lateral eyes dark in 

 colour; group of eyes near the middle of the 

 cephalothorax; posterior median eyes not cir- 

 cular. P. 287. CEcobiid^e 

 DD. Anterior median eyes dark in colour, all others 

 pearly white. 

 E. Eyes not massed in a small group; chelicerae 

 robust and furnished with a lateral condyle. 



P. 274. DlCTYNID/E 



EE. Eyes massed in a small group; chelicerae small and 

 without a lateral condyle. P. 289. Filistatid/e 

 BB. Without a cribellum and calamistrum. 

 C. Tarsi with only two claws. 

 D. With only six eyes. 



E. With a pair of tracheal spiracles behind the lung- 

 slits. 

 F. Coxae of the four pairs of legs similar and sub- 

 globose. P. 302. Oonopid^e 

 FF. Coxae of the first two pairs of legs much longer 

 than the other and cylindrical. P. 298. 



Dysderid^e 

 EE. With a single tracheal spiracle near the spin- 

 nerets. P. 303. SCYTODID^E 



DD. With eight eyes. 



E. First and second pairs of legs stouter and longer 

 than the third and fourth pairs, and extending 

 sidewise ("Crab-spiders"). 

 F. Lower margin of the furrow of the chelicerae 



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