GLYCIPHAGU8 D0MESTICU8 AND a. SPINIPE8. 



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of these cases. I placed some of them iu a cell as before and 

 dissected others ; these, in many instances, contained not the inert 

 legless mass found in the cases of G. domesticiis, but a distinctly 

 formed living Hypopus, which had not assumed the usual brown 

 chitinous colour, and could not be called active, but still was fully 

 formed, and provided with short and stumpy, but thoroughly-deve- 

 loped legs, which it could move about, although only in a feeble 

 manner ; it was not capable of walking (ordinary Hypopi are very 

 active), and it was evidently not in a condition fitted for existence as 

 a free-living creature ; but yet it was undoubtedly alive and fully 

 formed ; its total length was about "19 niillim., its greatest width 

 about "15 miliim. Each tarsus of the first three pairs had an 

 exceedingly long, very slightly curved, blunt claw ; the tarsi of 

 the fourth pair were devoid of claws and hairs. A figure of this 

 Hypopus, carefully drawn from a specimen dissected out of a case 

 in January 1888, is given in PI. XVI. fig. 9. The majority of the 

 Hypopi dissected out of the cases were not capable of any move- 

 ment ; it was only a few which were able to move their legs. T now 

 searched the chafi" and material, and the dust &c. swept from the 

 walls and beams of the cliafi'-house,very carefully in hopes of finding 

 active Hypopi which had emerged and were capable of walking 

 about, but neither on this nor on any other occasion have I been able 

 to discover anything of the kind ; but I did find one or two inactive 

 Hypopi not capable of any movement, which seemed as if, from 

 some accident, the cases had been broken away from them. On 2nd 

 January, 1886, 1 took one of these, and one of the Hypopi dissected 

 out of a ca&e and which could move its legs, and put them in a cell 

 by themselves. I watched them at frequent intervals, but they 

 did not die or shrivel up. On the 15th January I missed one of 

 the Hypopi ; but close to where it ought to have been I saw a 

 nymph of Glyciphagus spinipes, which had evidently just emerged 

 and had some thin membrane attached to it; on detaching this 

 membrane, and examining it with a higher power, I found that it 

 was the cast skin of the Hypopus. I put both the nymph and the 

 cast skin in glycerine for permanent preservation. A few days 

 later I dissected four more of the cases and took out four Hypopi 

 and placed them on a small piece of dried leaf in a separate cell ; 

 the next day I found that two had collapse>l, probably having 

 been injured during the dissection of their cases. The following 

 day I observed that one of the remaining two had moved, and on 

 touching it with a fine hair I saw that it was alive and able to 



