142 (DR. A. C. OUDEMANS). NOTES ON ACARI. 



Legs. (Fig. 31). The remur of all the legs is distinctly divided 

 in two joints (is provided with a profemur). Seen from aside all 

 the tarsi (Fig. 33) are somewliat swollen and falling off distally. 

 There is a little praetarsus with two strong claws and a pulvillum. 

 The legs are provided with feathered hairs ; on the proximal joints 

 the hairs resemble those of the body (Fig. 34) , distally they are much 

 more feathered (Fig. 35^. The tibia and tarsus bear one or two 

 olfactorial hairs (Fig. 36) and one or two tactile ones (Fig. 37). 



The proximal third part of the mandibles (Fig. 31) is swollen 

 and dorsally flat; the remaining two thirds suddenly become narrow. 

 Close to the end they are embraced by the maxillae (Fig. 31, 32 

 and 38), which show there a hyalin somewhat serrated edge. The 

 mandibles have no chelae, nor stylet, hooks, or other appendages. 



The 7naxillae bear or their ventral face two pairs of tactile hairs. 

 (Fig. 32). 



The palps have only 4 free joints (Fig. 38), decreasing in length 

 and in bulk. The third joint ends in an enormous hook and bears 

 ventrally and outward the fourth joint or «appendage». This too 

 ends in a hyalin chitiìioiis claw. 



Habitat: Discocyrtus funestus Butler (an Opilionid). 



Patria : Chili. 



20. Key to the species of Erythraeus Latr. 



Larvae. 



. ( With dorsal shield . , . . E. phalangioides (de Geer). 



( Without dorsal shield ... 2 



I Without crista E. lomatii Oudms. 



2. With crista like that of the 



^ adult E. quisquiliarum (Herm.) 



21. Thrombidium russicum Oudms. nov. sp. 

 (With Plate 12 fig. 39—42). 



Only one larva is known to me, found by Prof. J. Wagner on 

 a Russian bat. 



Length 424 ƒ< without capitulum. Colour pale. — 



