atid Classification of the Opiliones. 509 



The Palpatores or Plngiostethous Opiliones may be classified 

 tlien as follows ; — 



a. Anterior sternal plate {labium) small, wedj^-ed 

 in between the sterno-coxal or maxillary 

 processes of the appendages of the third 

 pair (first pair of legs) ; p.)sterior eternal 

 plate with its long axis longitudinal, nar- 

 row iu front, where it lies between the 

 coxiB of the appendages of the third pair, 

 expanding posteriorly and sending out a 

 right and left process, against which the 

 coxae of the fifth and sixth appendages 

 (third and fourth legs) abut, its posterior 

 border being strongly or moderately emar- 

 ginate ; the proximal end of the coxte of 

 the sixth appendage narrowed and not 

 overlapping that of the fifth towards the 

 middle line ; coxa of the fourth appendage 

 without a movable sterno-coxal process. 

 Dentition of digits of chelicerse evenly 

 serrulate. Penis of male without movable 

 terminal sclerite beyond the orifice (sec. 



Simon) '. Eupagosterni. 



a}. Sternites of opisthosoma free, over- 

 lapping, without median divisional sul- 

 cus ; first and second (genital and tra- 

 cheal) narrowed anteriorly and conically 

 produced between the coxae of the pro- 

 soma, and only overlapping the poste- 

 rior two pairs to a relatively small 

 extent ; eighth or penultimate terpite 

 large, greatly expanded laterallv, the 

 ninth or anal considerably larger than 

 the anal sternite and than the lateral 

 anal valves ; labrum elevated, subacute ; 

 legs lougish, with protarsi distally slen- 

 der, not wider than the tarsi, whicli are 

 multiarticulated. 

 a^. Ocular tubercle normal, bearing the 

 tw^o eyes and situated a little distance 

 behind the anterior border of the 

 carapace ; sternum thickly chitinized, 



inversely Y-shaped Fam. Nem^stomid.?5. 



b"^. Ocular tubercle absent, its place taken 

 by a pair of horizontally arched fron- 

 tal processes, bearing the eyes near 

 the middle of their length and over- 

 hanging the cheliceroe ; sternum less 

 strongly chitinized, very narrow in 



fi'ont, broadly triangular behind .... Fam. Dicraxolasmid.?-:. 

 h^. Sternites of opisthosoma, except the 

 genital and anal, fused, not overlapping, 

 and marked by a median longitudinal 

 sulcus ; first and second (genital and 

 tracheal) widely rounded anteriorly and 



