134 



SOLLFUG.E. 



base of the 4th leg there are five sensory organs, the malleoli — two 

 on the coxa, two on the 1 rochanter, and one on the trochantella. 

 Each consists of a slender basal piece or stalk, and an expanded 

 distal piece, the blade. There is no distinct waist between the 

 cephalothorax and abdomen snch as exists in the Uropygi and 

 Amblypygi. The abdomen consists of ten segments, each of which, 

 with exception of the last, bears a tergal plate above and a sternal 

 plate below ; the last or anal segment is represented by a single 

 plate marked with a vertical slit, the anal aperture. 



Generative organs open upon or behind the sternum of the 1st 

 abdominal segment, the plate showing modifications in structure 

 according to sex and age. 



Fig. 47. — Lower side of trunk and of bases of appendages of Galcodes. a, man- 

 dibles; h, c, d, e.g, coxaj of palp and of 1st, 2nd, 3rd, and 4th legs ; /, thoracic 

 stigma; h, 1st abdominal sternum; i, k, abdominal stigmata; I, anal 

 segment; m, trochanter, and 11, base of femur of palp; o, trochanter; 

 p, trochantin of 1st leg ; q, trochanter and trochantella of 3rd leg ; r, tro- 

 chanter and trochantella, s, trochantin, and t, base of femur of 4th leg ; 

 u, external malleolus. 



The respiratory organs are in the form of tubular tracheae, the 

 stigmata of which open upon or behind the sterna of the 2nd 

 and 3rd, rareby also of the 4th, abdominal segment. There 

 is, moreover, a pair of large stigmata situated upon the ventral 

 side of the 4th segment of the cephalothorax, one on each side 

 behind the coxa of the appendage. 



Sexual characters. Male with mandibles less strongly toothed and 



(except in one American genus) furnished above at the base of the 



upper jaw with an organ of unknown function, the flagellum. The 



first abdominal sternum in the adult female consists of a single 



plate marked with a median longitudinal groove. In the adult 



