A. C. OUDEMANS. ACARI. 129 



the geuu, tibia and tarsus. There is, I think, reason enough to consider the base ofthechelae 

 as a fusion of genu and tibia, for (see my fig. 45) on a distance behind the dorsal sense- 

 organ equal to the length of the upper jaw or basitarsus, the base shows a suture or groove 

 exactly like that which demarcates basifemur and telofemur, or basitarsus and telotarsus of 

 the legs. I therefore consider this suture as a démarcation of genu and tibia. BORNER consid- 

 ers the base of the chelae only as a tibia and, adopting the upper jaw as a basitarsus, he 

 calls the immovable pièce ûbiotarsus. I will call the base genutibia. Then this genutibia is prov- 

 ided on its internai side (Fig. 44) with the following appendages : 1. a lanceolate transparent 

 membrane near the condylus of the lower jaw and attached to the genutibia along its whole 

 length; its free edge is smooth ; 2. a second ditto a little more backward and dorsal to the 

 former; 3. a third ditto dorsal to the former and with serrate edge; 4. a row of fine fringe 

 dorsal to the former; 5. a long and somewhat wavy row of extremely fine fringe dorsal to 

 the former and extending forward till the perpendicular level of the tibial sense-organ ; finally 

 6. the radula. On the external side the genutibia is only provided with the sense-organ which 

 is configurate exactly like that of the foregoing species (see fig. 30). The lower jaw or telo- 

 tarsus is internally provided with the following appendages: 1. a little before the angulus 

 mandibuli only three or four transparent teeth on the ventral side of the jaw; 2. three 

 laciniate or feather-like appendages; 3. above the foremost of thèse feathers an extremely 

 thin membrane is attached which extends forward beyond the end-incisor, has a serrate edge 

 and is at least three times curled. The upper jaw or basitarsus is provided with a strong 

 end-incisor behind which a smaller one is visible. Then follows, proceeding backward, a small holè 

 without sense-organ though; then a row of 7 canines of which the second, fifth and seventh 

 are larger than the other ones. Then a little space above which the interior chitinous bar 

 is underbroken, to let entrance a nerve I suppose ; therefore I consider the teeth before this 

 nerve to be canines. Then a row of three canine-shaped molars. The lower jaw or telotarsus 

 is provided with a strong end-incisor, followed by a row of about 8 very low and blunt 

 teeth, then a canine, followed by three lower and one larger molars. Pulvillum only consisting 

 of three small flat teeth, behind which a membrane with a hollow prominence. 



Maxillae. The coxae and the hypostome are exactly like those of the foregoing species 

 (see p. 126), but the hypopharynx is a little shorter than the paraglossae. The trochanter 

 of the palp is dorsally bare, ventrally provided with the usual two hairs and the distal and 

 internai little transparent pin. The fémur is dorsally provided with 4 hairs, one proximally 

 directed outward, and three other ones directed inward; dorsally internally and distally with a 

 little transparent pin ; ventrally with one hair proximally and one knife-shaped hair inter- 

 nally, exactly like that of the foregoing species (Fig. 48). The genu dorsally with four or five 

 hairs, ventrally with only one hair, and internally with two knife-shaped hairs like that of 

 the fémur. The tibia dorsally with about six hairs, ventrally with about four hairs. The tarsus 

 with numerous hairs and ventrally and internally with the usual trifid hair like that of the 

 foregoing species (Fig. 37J. 



Legs like those of the foregoing species. The fémur I is somewhat nodded in its first 

 third portion (Fig. 40J. 



Habitat. - 



Nova Guinea. V. Zoologie. 17 



