384 Transactions of the Society. 



homhi, has abandoned its parasitic life, and has lost the need for 

 the hair-holding claw, which has become obsolete, but has not yet 

 lost the hypopial form. I fear that the course of development will 

 hardly assist in this inquiry, as the hypopial form is only present 

 in the adult, even in lonibi, and is quite absent both from the male 

 and the immature stages. 



The male and the nymph of the present species will be found 

 sufficiently curious. 



Glyciphagus (Dermaoakus) Cbameei n. s. 

 PI. X. and PI. XL figs. 13-19. 



Average length, about 

 breadth „ 



length of legs, 1st pair, about 

 „ 2nd „ „ 

 )} 3j uru. „ „ 



Colour dull reddish-brown, of medium depth of tint; the 

 male a trifle darker than the female. When the creature has just 

 emerged from the nymphal skin the hinder part of the abdomen of 

 the female is lighter than the anterior portion ; at this time, in 

 both sexes, there is a pinkish shade, and the tint of course is 

 hghter. 



Texture dull and rough, rather granular, the female more 

 strongly so than the male. 



Female (figs. 1 and 2). 



Cephalothorax as seen from above, about one-fifth of the 

 total length ; narrow ; lateral margin (behind the rostram) con- 

 cave ; the posterior part of the cephalothorax is, however, as wide 

 as the anterior margin of the abdomen, or nearly so. Eostrum 

 slightly truncated, or concave anteriorly. There are two very 

 short rostral hairs. A narrow, raised, longitudinal ridge starts 

 from near the rostral hair on each side, and, after following the 

 line of the rostrum for a short distance, curves toward the median 

 line, and after the middle of the cephalothorax curves outward 

 again and runs as far as the abdomen. Mandibles short, powerful, 

 chelate ; tridentate on each limb of the chela. The mandibles do 

 not usually project beyond the rostrum when not in use. There is 

 a strongly chitinized concavity at each side of the cephalothorax 

 near the base, which holds air when the creature is immersed in 

 liquid. It appears to be partly closed by a membrane, and to have 

 a nerve running to it, possibly it may be a sense organ. It is found 

 in both sexes. The chitiuous skeletal pieces of the under surface of 



