Studies on Arthropods. I. 



broad ; the proximal process at its front margin protrudes before 

 the middle of the segment, is long, broad at the base and tapers 

 towards the broadly obtuse end. The most distal part of the 

 segment has a moderately long, curved, distally slender process 

 and besides a pair of short, triangular processes; the compli- 

 cated shape may be judged from the two figures. 



Length of the body 6.6 mm., of second leg 10 mm. 



Immature Specimens. 



Specimens not far from full-grown differ as usual from the 

 adult female in the colour; the cephalothorax is yellowish ferru- 

 gineous, the abdomen greyish arid the legs brownish yellow; 

 furthermore, in the palps the femoral part is more slender, the 

 tibial part has the subbasal portion conspicuously thicker 

 than the middle, and it increases scarcely in thickness from 

 the middle to the end. 



A younger specimen, which has only four joints in the tarsi 

 of fourth pair but the full number in the other pairs, is 4.1 mm. 

 long, with second leg 5.6 mm. ; it has the palps more slender 

 than in older specimens, and the sublateral impressions on the 

 cucullus are scarcely discernible. 



One of the smallest specimens (the real larvae excepted) 

 is 3.1 mm. long with second leg 4.2 mm. It has only four joints 

 in second tarsus, three joints in third, and two joints in fourth 

 tarsus. Cephalothorax has the median groove well developed 

 excepting towards the anterior margin, but some of the other 

 grooves are partly or wholly indistinct, and the cucullus has no 

 sublateral impressions. The animal is more yellowish than older 

 specimens. 



The larva with three pairs of legs has been described above 



(p. 22). 



Remarks. As already mentioned C. Fece is allied to 

 C. Afzelii, but it is much smaller, the granules on body and 



