NO. 14 



INSECT ABDOMEN SNODGRASS 



55 



^ ^ gg-S Gpr 



I J .^ 2Gp K 



Fig. 20. — Chilopoda : external genitalia. 



A, Scolopcndra, posterior end of body of embryo, showing two small segments 

 in genital region between last leg-bearing segment and telson (from Heymons, 

 1901). B, Scolopocryptops, male, terminal part of body with penis protracted. 

 C, same, female, genital and anal segments. D, same, male, genital and anal 

 segments, lateral view. E, same, male, posterior end of body, ventral view. 

 F, Lithobius, female, posterior end of body, ventral view. G, same, corresponding 

 segments of male. H, same, female, lateral view of posterior body segments. 

 I, same, male, ventral view of penis and ducts. J, Scutigera forceps, male, 

 posterior end of body, ventral view. K, same, corresponding segments of 

 female, ventral view. 



An, anus ; Cx, coxa ; Cxpd, coxopodite ; Dct, genital duct ; Gp, gonopod : 

 iGp, 2Gp, first and second gonopods ; gS, genital sternum; igS, 2gS, first and 

 second genital sterna ; igSeg, first genital, or pregenital, segment ; sgSeg, 

 second genital, or genital, segment; gT, genital tergum; Pen, penis; Sex, sub- 

 coxa; Stn, sternum; T, tergum; Tel, telson; Tr, trochanter. 



