213 



Deseription. 



Larva. The larvae of this species are iminediately recognizable 

 from those of Gl. domesticus by their lacking the crista or ru- 

 diment of a dorsal shield, and by their having the subtarsal scale. 

 Colour white; length from 160 to 200 M. Texture like that of 

 the adult. 



Nymphs. Like the adults, but without the genital openings. 

 Yet internally the genital suckers are already formed. Colour 

 white; length from 200 to 240 yi.. Texture like that of the adult, 

 but, wheu a n) mph is in the period of changiug in a hypopus, 

 its skin becomes large, more or less hexagon wrinkles. So we 

 may meet with nymphs of which a great part of the skin shows 

 hexagons, whilst the rest is punctured. 



Hypopial case (Fig. 16). It is almost equal width throughout, 

 blunt posteriorly, and here provided with two angles. So it dif- 

 fers from that of Gl. michaeli Oudms., which is almost piriform 

 or spool-shaped. Length from 320—360 M. 



Hypopus (Fig. 17 — 20). I found two forms of hypopus. The 

 larger I consider as a younger stadium. Both were dissected by 

 me from hypopial cases which decidedly belonged to this species. 

 The larger (Fig. 17), younger one, is almost circular with a 

 semi-circular cephalic lobe, and has no dorsal line of demarcation 

 between cephalothorax and abdomen. Ventrallly it shows the 

 epimera I joined distally, not forming however a sternum. Epi- 

 mera II are curved inward. The coxal plates II are outward and 

 backward sharply demarcated by a chitinous, epimeralike bar, which 

 is curved inward and far backward, reaching nearly the epimera 

 IV. Epimera III is the smallest; epimera IV about twice larger. The 

 genital aperture rather large, distinctly shut by two valves and 

 inwardly provided with 4 suckers, 2 on each side. I did not 

 observe any anal opening. Legs I, II, III are provided distally 

 with 3 claw-like hairs (Fig. 18). Legs IV lack these. — The 

 smaller (Fig. 19) older and most probably final form has the usual 

 hypopus-forra, is almost pentagonal, with almost triangular cepha- 



