Bd. V: II) 



THE ACARI. 



II 



Ganiasiphis loricatus Tgdh adult 5. 

 Fig. 15. Right maxillary lobe. 232 x. Fig. 16. Epistoma. 464 x. Fig. 17 



part of sternal shield. 330 y . 



Tugular, genital and anterior 



Parallel with the anterior edge of the sternal shield, behind the anterior pair of 

 hairs there is a pair of light coloured grooves, \\hich, as in the case of Hvdroga- 

 inasiis antarcticits Tgdh I interpret as being remnants of a fusion between a 

 second pair of jugular shields and the sternal shield. This seems all the more 

 probable as in G. pulchelhis there are two pairs of jugular shields. Such light 

 coloured grooves are also to be found running parallel with the edges of the foveolœ 

 pédales. (Text-fig. 17.) Five pairs of hairs on the sternal shield, of which one pair 

 is near to the anterior margin, one on the inner side of coxae II, two pairs on the 

 inner side of coxse III and one pair in the posterolateral angles. 



The. genital aperture large, covered b}- a rounded plate, whose anterior edge projects 

 in a small point: the genital plate is almost entire!}' surrounded by the sternal shield. 

 (Text-fig. 17.) The ventri-anal shield coalesces whith the dorsal shield in the posterior 

 half, but a distinctly demarcated line runs in an even curve inwards from the postero- 

 lateral angles of the peritremata and extends backwards as far as ' 2 of the length 

 of the ventri-anal shield. 



There are about 14 pairs of hairs shaped like those of the dorsal shield. 



Anal aperture small, raised and situated near the posterior margin. 



Stigmata between coxae III and IV; peritremata lateral, raised, extend forward 

 to the level of the anterior margin of coxae I; peritrematic shields discernible on the 

 e.xterior side near the posterior end of the peritremata, not demarcated from the 

 ventri-anal shield at the back. 



The legs richly provided with rather long, fine, bare hairs. Legs I with long, 

 curved coxae, twice as long as the trochanter, which on the dorsal side has a large 

 bristle; femur of the same length as the tarsus, which latter is of even \\idth through- 

 out and narrows ver}' abruptly at the end; genu nearly of equal length with the tibia, 

 which is -'s of the tarsus; tarsus very richl}' provided with hairs, especiall}- at the 

 end, on the exterior side; claws small with semicircular caruncle. 



Legs II, large and thick; femur with calcar femoralis (PI. I, fig. 7) rather long, 

 fingershaped, with constricted base and rounded tip; there is no processus genualis 



