126 A. C. OUDEMANS. ACARI. 



Maxillae. Viewed with a ventral aspect (Fig. 25) the maxillae show the following par- 

 ticulars : the coxae are fused to constitute the underside of the rostrum ; they bear the usual 

 4 pairs of hairs of which one pair posteriorly, submedian and nearly in the middle and the 

 three other pairs near the médian prolongations or inner malae (see also fig. 32). The onter 

 malae or horns (see also fig. 33) are of the usual type and strength, dark chitinous, and intern- 

 ally and in the middle provided with a tooth directed inward. The inner malae (Fig. 32) 

 are each longitudinally divided in two lobes. The outer lobes are membranaceous long slips, 

 diminishing in width distalward, and finely fringed in their distal half. The inner lobes, at- 

 tached on the underside (ventral surface) of the outer lobes, are narrow slips, slightly longer 

 than the outer lobes, and like thèse finely fringed in their distal half. The trochanter (of the 

 palp) is bare on its dorsal side and provided with the usual two hairs or bristles on its 

 ventral side (Fig. 24 and 25). Distally and internally it ends in a little transparent pin. The 

 fémur is dorsally provided with three hairs, one proximally, one a little more forward and 

 one distally; ventrally with one hair proximally; internally with a long knife-shaped hair 

 (Fig. 36) of which the posterior edge is blunt and provided in its distal half with two rows 

 of fine fringe. Dorsally and internally it ends in a little transparent pin. The genit is dorsally 

 provided with only one distal hair; ventrally with only one hair in the middle; externally 

 with one hair in the middle ; and internally with two knife-shaped hairs, like those of the 

 fémur, but smaller. The tibia is dorsally densely haired and ventrally provided with three 

 hairs. The tarsus is wholly covered with hairs, moreover its bears ventrally, proximally and 

 internally the usual trifid hair (Fig. 37) of which one tooth is smaller than the two other ones. 



When we dissect the maxillae to view them with a dorsal aspect, we meet with very 

 complicate particulars. I hâve delineated thèse interior pièces in fig. 34 : a a are the two 

 outer lobes of the inner malae; b b are the inner lobes of the inner malae; c is one of the 

 outer malae or horns; d is the lingna or hypopharynx, distally sharply pointed, proximally 

 a perpendicular blade densely covered with membranaceous teeth; e is one of the two para- 

 glossae (the other is covered by the lingua, folded by pressure of the covering-glass) densely 

 covered with lax membranaceous teeth and united along their whole length with the base 

 of the inner malae; //are two stylet-shaped and curve things which I will call parepipha- 

 rynges as they stand aside the epipharynx g. The parepipharynges are densely covered with 

 extremely minute hairs (only discernible with immersion System). Finally g is the epipharynx, 

 a strong chitinous proximally blade-like, distally sharply pointed pièce, internally armed with 

 4 teeth. In fig. 35 I hâve ventured to reconstruct the mouth parts; purposely I use for the 

 greater part the same signs : a are the outer lobes of the inner malae; b are the inner lobes 

 of the inner malae; c are the outer malae or horns; d is the lingua or hypopharynx; e are 

 the paraglossae; / are the parepipharynges; g is the epipharynx; it is clear that the blade- 

 like portion of the epipharynx and the opposite blade-like portion of the hypopharynx divide 

 the entrance of the oesophagus in two canals h ; i are the strong chitinizations visible be- 

 tween the hypostome and the palpi with a ventral aspect (see fig. 25); k are the bases of 

 the palpi ; /, where I put a +> are the places whefe the styli should be drawn if they were 

 présent; m is the epistome; n are the sheath-shaped trochanterofemora of the mandibles; o 

 are the parts of the mandibles hidden in the sheath when retracted : their genu-tibio-tarsus; 

 p is the crista of the epistome. 



