ACAET OP THE GENUS GLTCIPHAGUS. 277 



are decidedly, but not strongly, curved ; the others are straighter. 

 In the centre of the hind margin is the projecting "button" 

 characteristic of the females of this genus, and which is really a 

 bursa copulatrix ; it is rather unusually long, and directed 

 slightly upward. Down the back are two rows of fine strong 

 spines, of which the first is directed forward and the others back- 

 ward ; the third of these is the longest and the fourth the 

 shortest. There is also a very long spine between the third and 

 fourth, but nearer to the lateral edge of the abdomen. The 

 underside is much arched and projecting in the centre, the 

 edges being thinner and flatter. 



The sternum is short, and coalesces with a chitinous band 

 behind the labium, to which also the epimera of the first pair of 

 legs are joined. The epimera of the second pair are free, not 

 joined to any other skeletal sclerites. The epimera of the two 

 hind pairs of legs are joined together at their inner ends by a 

 cross-piece ; none of the epimera quite reach the vulval sclerites, 

 although they approach very close. The vulva (of oviposition) 

 (fig. 15) is large, placed far forward, its anterior end being be- 

 tween the cosse of the second pair of legs ; it is protected an- 

 teriorly by a thick chitinous piece of a pointed-arch shape, the 

 point forward, and posteriorly by a more rounded and thinner 

 piece fitting within the arch, so that the whole form a ring with 

 an anterior point and free lateral projections. The labia extend 

 the whole length of this ring ; they bear two pairs of very minute 

 hairs on their exterior. The anal opening is long, almost at the 

 hind margin; it has projecting labia lying together like knife- 

 edges, and is bordered by five pairs of spines of various sizes, of 

 which three form a triangle on each side. 



The alimentary canal (fig. 13) is of the usual type. A short 

 oesophagus (part shown at oe.) leads into a large ventriculus 

 {v.) wider than its length, and furnished with two large, but 

 short, csecal appendages (c.) ; this is sharply divided from an 

 almost globular colon {co), and wide, elongated, funnel-shaped 

 rectum (r). The bursa copulatrix (fig. 14, B) leads by a long, thin, • 

 flexible, hyaline, sperm-duct {d.) into a large yellowish sac, 

 the receptaculum seminis (r.s.), which communicates by two 

 very short but wider ducts with the paired ovaries (o. o.), which 

 again lead into the long much-looped oviducts {pd. od.), in 

 which the eggs may be found in all stages of development. 



