280 



ME. A. D. MICHAEL ON SOME UNDESCBIBED 



round the periphery, instead of being separated by spaces and 

 absent from the hind margin, as in the adult, form an almost 

 continuous line round the lateral and posterior margins. It is 

 evident that the spikes carried by these projections will tbus 

 afford greater protection to the creature during growth, and at 

 the period of life when the object of the straight hind margin of 

 the adult has not arisen. 



The Larva. 



This has much the same characters as the nymph, except that 

 it is smaller, more transparent and compact, with the raised edge 

 less strongly marked, and it is, of course, hexapod. 



GrLTCiPHAGFS DisPAE, n. sp. (Plate XXXY. figs. 6-17.) 



Colour, when just emerged white ; afterwards the female is 

 light reddish brown, darker and redder than that of G. platy- 

 gaster. The spaces on the underside enclosed by the sclerites 

 surrounding the genital and anal regions remain pure white. 

 The male is dull light grey, considerably lighter than the female, 

 and entirely without the red tinge. 



Texture of the female very similar to that of G. platy gaster ; 

 the male, however, is diiFerent, being covered with small hemi- 

 spherical bosses or dots, much larger in proportion to the size 

 of the creature, and much rounder and more regular. 



Female. 



Very similar, except in size, to that of G. platygaster, although 

 there are numerous well-marked specific diflierence?, particularly 

 in the abdomen and the epimera and other chitinous pieces of 

 the underside. 



Cephalothorax. — Similar in almost all respects to that of G. pla- 

 tygaster, except that the hairs of the dorso-vertex do not spring 

 from papillae. There is not any true sternum. The vulva of 

 parturition, which is very large, extending from the level of the 

 insertion of the lower edge of the first leg nearly to that of the 



