57 G BRITISH ORIBATIDiE. 



the hind margin ; of about even thickness throughout ; 

 amply furnished with fine hairs, chiefly curved, and in 

 whorls. 



Abdomen without markings, but with a slight ridge 

 along the progaster ; oval, rounded, and slightly trun- 

 cated anteriorly; pointed posteriorly; considerably 

 arched. There are about six pairs of strong setiform 

 hairs along the lateral and posterior margins, gradually 

 increasing in length from the progaster to the posterior 

 end ; and there are three pairs of similar but rather 

 smaller, hairs forming two longitudinal lines near the 

 middle of the notogaster. 



Cepheus bifidatus. pi. LII, figs. 2, 3. (Adult de- 

 scribed in vol. i, at page 290.) 



Nymph. 



This singular and beautiful creature is decidedly of 

 the type of the nymphs of Tegeocranus latus and T. 

 dentatus, and strongly resembles them ; but the spines 

 bordering the abdomen are far longer and more slender 

 in the present species ; and the processes from which 

 they spring are much smaller, indeed unimportant, and 

 of entirely different form. 



Colour very light buff or drab, almost white ; legs 

 and rostrum light pink-brown. 



Texture rough, granular, almost glittering. 



Form elliptical ; the ellipse becomes broader at each 

 change of skin ; the edge is rough and broken by 

 granulations. 



Cephalothorax. — Rostrum blunt-pointed ; cephalo- 

 thorax small, conical. Pseudo-stigmata dorsal; pseudo- 

 stigmatic organs setiform, serrated spines. Interla- 

 mellar hairs similar ; rostral hairs short and simple. 



Legs short, of about even thickness throughout ; 

 joints rough and irregular in form. Each of the three 

 central joints of the two front pairs of legs bears a 



