Bd V: II). THE ACARI. 9 



obliquely and backwardly directed projection, nearly cylindrical in form, which seems 

 to be the orifice of a duct. The projection is supported by a strong sharply pointed 

 bristle, situated close to the anterior margin of the basitarsus. Furthermore there 

 are two sharp ridges on the internal side of the telotarsus extending one in front 

 of the other along a line drawn from the top of the projection obliquely towards a 

 large hair, situated near the ventral (inner) edge of the telotarsus. 



Legs III and IV slender, with tarsi narrowing gradually towards the end; 

 tarsi IV longer and provided with longer hairs. 



Female. 



The epistoma and Iiypostoina are correctly delineated by Trouessart with the 

 exception, that there are four pairs of hypostomatic hairs instead of the two pairs 

 delineated by him. The second free joint of the palpi thick, but without a distinct 

 ventral projection. 



The mandibles (PL II, fig. lO); the lower jaw slightly shorter than the upper 

 one, for the two distal thirds of its length curved upwards, with large terminal tooth 

 and three others of which the posterior one is the largest. The upper jaw is straight 

 and has, besides the terminal tooth, five others of which two small ones are situated 

 opposite the terminal tooth of the lower jaw and the 3rd and 4th opposite the first 

 and second of the lower jaw. 



The legs (Text-figs 11 & 12). The exterior dorsal edge of trochanter IV bears 

 two straight projections of which the anterior one is twice as long as the posterior 

 one. The telofemur, on the ventral side, close to the proximal edge provided with 

 a third projection directed obliquely outward. TROUESSART has not delineated the 

 smaller one of the processi trochanteralis, which is indeed easily overlooked if the 

 leg be not cut off and examined from both sides. The cuticle of trochanter IV has 

 distally a it)unded elongate area, striated transversally (Te.xt-fig. 12). 



The above described species ditters from the other members of the genus 

 through the peculiar shape of tarsus II of the male. As however a structure of 

 tarsus II cf very similar to that of G. Racovitzai occurs in a member of quite 

 another genus viz. Hydrogamasiis which will be described below it appears to be of 

 no generic nor even of subgeneric value. 



A processus tarsalis of o^ leg II has, as far as I am aware, as yet only been 

 found in Parasitiis magnus Kr. and in Halolcelaps glabriusciiliis Berl. & TROUES- 

 SART. In both these species they are however differently shaped and situated on 

 the ventral side of the tarsus, not on the dorsal side as in G. Racovitzai and 

 Hydrogamasiis antarcticiis Processi trochanteralis and femoralis of leg IV $ have 

 only been found in the female of Cyrtolœlaps Capreoliis BerleSE from Java. 



Locality: No. 2. Several males, females and nymphas. 



'"^V"? Schwedische Siidpolar- Expedition igoi — igoj. 2 



