Bd. V: II) THE ACARI. 



Relative length of the joints and the terminal hairs. 



25 



The present species is closely related to B. vulgaris but is easily distinguished 

 from that species by the shape of the mandibles, the situation of the mandibular 

 hairs, the fusion of the 2nd and 3rd joint of the palpi and the number of rostral 

 hairs. 



Locality: X:o 17. Several specimens. 



/. 



II. Erythraeus antarcticus nov. spec. 



(Text-figs. 48. 52.1 



Average length 1,3 mm; breadth 0.75 mm. 



Colour, crimson red (according to the notes made on the specimens when alive 

 by Prof J. G. Andersson). 



52 



3 0. 



Erytkrœiis antarcticus Tgdh. 



Fig. 48. Left mandible seen from the outer side. 230 x. Fig. 49. Crista metopica. 112 x. Fig. 50. Pseudo- 

 capitulum and coxae I, II, ventral view. 56 x. Fig. 51. Coxje III and IV and leg III. 56 x. 



Fig. 52. Leg IV. 56 .X . 



The present species seems to be closely related to E. medioarcolatus Kram. 

 [5, p. 10 — II, figs. 13 — 15] described from Tierra del Fuego. It differs from it in 

 the following respects: 



'"^^o?. Sclnvedische Südpclai-Expedition igo2 — iqoS- 4 



