ANNULOSA. 



63 



(Meade, Monograph of the British Species of Phalangium, Ann. Nat. Hist., 

 1845 ; Dufour, Histoire anatomique et physiologique des Scorpions, 1856 ; 

 Metschnlkoff, Embryologie des Scorpions, Leipzig, 1870 ; Walckenaer and 

 Gervais, Histoire naturelle des Insectes apteres, Paris, 1837-44 ; Packard, 

 Guide to the Study of Insects, Boston, 1878.) 



V 



Fig. 58. Pedipalpi. A, Scorpio afer, viewed from above, and somewhat reduced in size. 

 B, Front portion of the head of the same, viewed from above, and enlarged, c, Btithus 

 Kochii, with the terminal segments and the ends of the appendages on one side omitted. 

 TO, Maxillary palpi (behind these are the four pairs of ambulatory legs) ; c, Chelicerse ; t, 

 Telson ; o, Lateral ocelli ; o', Central, larger ocelli ; y, Opercular plate, covering the opening 

 of the reproductive organs ; r, One of the " combs ; " , One of the stigmatic openings, (c 

 is after Prof. Ray Lankester.) 



ORDER V. ARANEIDA (Spiders). 



Sub-ord. 1. Tetrapneumones. 

 Fam. Mygalidse. Mygale. 



Sub-ord. 2. Dipneumones. 



Section 1. Vagabunda, Salticus, Lycosa. 



