Bd. V: II) THE ACAkl. 35 



Appendix. 



Acari of the Scotch Antarctic Expedition 



by 

 E-L. TROUESSART. 



Paris. 



Penthalodes intermedius nov. spec. 



Shape oval, the sides not parallel; céphalothorax not demarcated from the ab- 

 domen. Rostrum shaped like that of P. Belli, but the palpi and the mandibles are 

 very large. The epistoma ends in a truncated point; the shoulders not marked- 

 rounded. No collarshaped plate, only a thickening of the cuticle at the base of 

 the rostrum. 



The shields bear a great resemblance to those of P. villosits. 



Dorsal side. The epistomatic shield large, triangular, with rounded angles, at 

 the anterior end with a large ridge, which narrows backwards and divides the sur, 

 face of the shield into two oval spaces. The notogastric plate long, rectangular as 

 in P. villosus. 



Ventral side. The sternal shield trapezoidal, excavated at the front margin to 

 receive the camerostomum, with the coxje projecting; the ventral shield large with 

 large, quadrangular genital plate, situated further backward than in P. villosus. 

 Anal aperture low, without tubercle; the hind margin of the abdomen rounded. 

 The legs arranged according to their length, i, 4, 3, 2. The first pair longer than 

 the body without rostrum, with an incision between the ist and 2nd joint; 2nd 

 and 3d joints fused together for ^'3; the fusion well marked; 6th joint as long as 

 the 2nd (without the 3d). Feathered hairs on all the joints and at the hind margin 

 of the body. No velvet hairs on the bod}-. Length 700 f/. Breadth 350 /u. 

 Locality: South-Orkneys, Isle Laurie. In moss. 



