Bd. V: II) THE ACARI. 3 1 



Legs rather short; tarsi II — IV flattened, on the ventral side with a longitudinal, 

 knife-shaped ridge. Femora I and II slightly longer than the tibise; femora III and 

 IV slightly shorter. The median halves of epimera III and IV coalesced. 



Claws monodactyle. , 



Abdonieii oval, well rounded at the hind end. Notogaster not very arched. The 

 pteromorphae extend backwards to the middle of the abdomen, gradually narrowing 

 (Text-fig. 56). 



The anterior, slightly concave and the lateral margin form a nearly right angle, 

 well rounded. 



On the dorsal side, on the border between the central and the marginal portion 

 is a band of irregular, rounded, white depressions, where the cuticle is thinner and 

 where most probably some excretory pores are situated. Outside this band are 

 situated 6 pairs of week hairs and on the hind margin are two pairs of setiform, 

 flexible hairs. 



The genital aperture is small, oval, the ratio of length to breadth being as 5 

 to 3, situated far forward, between the epimera III and IV and projecting only with 

 the last V 4 beyond epimera IV. 



The anal aperture large, quadrangular, with rounded angles, situated far back. 



The above described species seems to be most closely related to Oribatula 

 similis, the only other member of the genus which is monodactyle; but it is easily 

 recognized through its more elongated shape, the abdomen not being distinctly 

 demarcated from the cephalothora.x and the crateriform depressions of the abdomen. 



Localities : No. 1 and 14. 



21. Damaeus curtipes nov. spec") 



(PI. Ill, figs. 3 and 7.) 



Length 0,55 mm. 



Shape oval, pointed anteriorly, rounded posteriorly. 



Céphalothorax long, being about ^/s of the entire length. Rostrum broad, 

 bluntly pointed at the tip; dorsovertex arched, leaving a depressed, well demarcated 

 band between it and the abdomen. Pseudostigmata dorsal, near together. Pseu- 

 dostigmatic organs rather long (PI. Ill, fig. 7), slightly recurved, with long, slender 

 peduncles and lanceolate, hairy heads. No interlamellar hairs. Lamellar hairs 

 persisting near the anterior margin of dorsoverte.x, although there are not any 



') After a sketch had been made with the help of the camera lucida the only specimen got smashed 

 to pieces through an accident; this has prevented me from giving a more detailed description; at any rate 

 the present description will be sufficient for purposes of identification. 



