190 REVISTA CHILENA DE HISTORIA XATLKAL 



parentheses and «Op.») the first ñgiire rafers to the imte 

 rior group of setae, the second to the posterior gvoup and 

 the third to the total number. In almost all cases setae are 

 arranged in a bilaterally symmetrical manner. 



CHELIFEKIDAE 



Chelauops (Lamprocheriies)macrochelatus. (Tomos- 

 vary) (Fig. 21 A-G). --C^teli/er macrochelatus. Tom., 1907 

 With, Trans. Zool. Soc. Lond. xviii; 310: figs. 



Material examined and determination. — One adult fe- 

 male from Valle Azapa, Tacna, Chile, CoUected by Dr. 

 Carlos E. Porter in June 1912. The specimen is deposited 

 in my oAVn personal collection. 



The determination is based upon Withs' monograph 

 of 1906 and with the exception of a few minor difieren - 

 ees seems to check in every way Avith his descriptioñ and 

 figures. The following figures and notes are inteuted to 

 supplemeut Withs" descriptioñ, referred to above. The 

 species is one which is apparently rather widespread in 

 South ilm erica. 



Remarks and morplwlogical notes. — ^Although With 

 states in many places in his works, that the genital áreas 

 of these animáis Avill probably furnish characters of great 

 systematic importance, he himself never weut into this 

 phase of his subject to any extent. My experience has 

 confirmed his observations entirely and these parts should 

 never be ueglected in descriptions of these arachnids, 

 particularly in the genus Chelifer in its oíd sense. The 

 dentition of the fingers of the palpi are also of great im- 

 portance and should ahvays be ver}' thoroly and carefu- 

 lly worked out. Sexual differences must ahvays be allo- 

 wed for. The figures with their captions are self expla- 

 natory and nothing need be said concerning them here. 

 The following chaetotaxal formulas will probably prove 



