Spiders and Their Near Relatives 



(Fig. 39). The upper finger of the male is without teeth; but there 

 are several teeth on the basal half of the lower finger. 



Only a single species has been 

 described; this is Hemerotrecba cali- 

 fornica. It was found near Pacific 

 Grove, California. The male meas- 

 ures two fifths inch in length. The 

 adult female is unknown as yet. 



Genus AMMOTRECHA 

 (Am-mot're-cha) 



Fig. 3 g. CHELICER/E OF 

 HEMEROTRECHA 



The members of this genus are 

 sharply distinguished from the other 

 two genera found in our fauna by the subconical form of the 

 anterior end of the cephalothorax 

 (Fig. 40). The chelicerae are long 

 and not so stout as in Eremobates. 

 The fixed finger is armed with a row 

 of unequal teeth. 



The name Ammotrecha has been 

 substituted for Cleobis formerly applied 

 to this genus, as the name Cleobis was 

 preoccupied. 



Only three species of Ammotrecha 

 have been found within the United 

 States; these are separated by Banks 

 ('00) as follows: 



A. Lower finger of the chelicerae 

 finely, but distinctly, denticu- 



■Y y ' V - ,IL,V '" Fig. 40. AMMOTRECHA CUB^ 



late beyond the large teeth (after Putnam) 



near its base; a broad dark 



band on the middle of the metatarsus of the palpus. 

 Occurs in California. Ammotrecha californica 



AA. Lower finger not denticulate. 



B. Upper finger with a very plain ridge above at base, below 

 there are several small teeth followed by three large 

 subequal teeth. Occurs in Arizona. 



Ammotrecha peninsulana 



38 



