282 MR. A. D. MICHAEL ON SOME TJIirDESCKIBEB 



aud a pair of larger spines on the underide of the abdomen, 

 further back and more to the side. 



Male. 



This is quite unlike the female in appearance ; irrespective of 

 the extreme difference in size, and the difference in colour and 

 texture before referred to, the legs and abdomen are quite 

 dissimilar. 



Cephalothorax much like that of the female, but without the 

 hinder of tlie two pairs of spines conspicuous in that sex, and 

 having the front pair very small and exactly at the angle of the 

 epistome. The trophi, particularly th e palpi, seem to be well 

 formed. There is not any true sternum nor any epimera to the 

 second, third, or fourth legs ; but there is an epimeral piece both 

 above and below the first leg, which two are joined at their 

 inner ends, and the lower is also joined to the outer penial 

 sclerites (PI. XXXV. fig. 17). 



Legs short and thick, almost conical, but slightly curved. The 

 two hinder pairs are wholly hidden beneath the body. The 

 femora are somewhat bell-shaped, particularly in the two poste- 

 rior pairs of legs (the two front pairs having an inward curve). 

 The tarsi of the two hind pairs of legs are articulated in the same 

 manner as those of the male of G. platygaster ; but the arrange- 

 ment is not 'quite so conspicuous. The caruncles are propor- 

 tionally shorter and broader than those of the female. 



Abdomen almost shield or spade-shaped, the anterior margin 

 straight for the short distance where it joins the cex^halothorax, 

 then running outward and backward in a double curve on each 

 side. The abdomen is widest at the anterior angle of the lateral 

 margin, and gradually narrows backward. The hind margin is 

 rounded. There is a low broad rounded elevation along the 

 greater part of the median line, with a sulcation round it ; other- 

 wise the notogaster is flat. The abdomen is less thick in j)ropor- 

 tion, from dorsal to ventral surface, than that of tlie female. 

 Eound the edge are six or seven very small straight spines ; the 

 bifid or trifid projections and great curved spines of the female 

 are entirely absent. There are three or four pairs of small 

 spines on the notogaster similar to those round the edge. The 

 anus is also protected by two pairs of spines. 



