(dr. a. C. OUDEMANSÌ. 'NEW LIST OF DUTCH ACARI, I. 163 



forms drawn by Michael (Brit. Orib. II. tab. 28. f. 6) and Berlese 

 (Ac. Myr. Scoi^p. Ital. fase. 77, nr. 5). The hairs on the abdomen 

 are scarcely visible. I don't observe any mooncratershaped organs 

 on the abdomen. The blades at the anterior corners of the abdomen 

 gradually run into the lamellae, and" under these blades the pseu- 

 dostigmata are hidden The pseudostigmatic organs are shorter than 

 delineated by Berlese. 



Eremaeus frisiae Oudms. 



A species very like Eremaeus burroivsl Michael , but instead of 

 thick hairs it bears thin hairs on the dorsum of the abdomen. 

 Further the femora 1 , 2 and 3 are not so swollen as in biirrowsi ; 

 the hears on the legs are not pectinated but smooth , and the tibiae 

 of all the legs bear on their distal end a tactile hair which is as 

 long as or longer than the tarsus. Lamellae above ô of the length 

 of the céphalothorax. Length 0,450 mm. 



Therefore we should change the « key » on page 43 of « Das 

 Tierreich , Oribatidae » as follows : 



j Lam. much broader anteriorly than posteriorly E. giaber. 

 I Lam. acquai width throughout — ^a. 

 Lam. about | of Gephth. ; Triam, rather 

 more than a mere line; legs with pectin- 



ated hairs E. burrowsi. 



Lam. above | of Cephtli. ; Tilam. a blade 

 about as wide as Lam. ; legs with smooth 

 hairs E. frisiae. 



Eremaeus lucorum (C. L. Koch). 



On each side of the obdomen there are three to five moon- 

 crater-shaped organs. — Amongst my specimens there are with 

 an almost round abdomen , resembling perfectly that of Eremaeus 

 pilosus (C. L. Koch). My specimens vary from 0.594 to 0.906 mm. 

 in length, 



Eremaeus confervae (Schrank). 

 My drawing of the pseudostigmatic organs on Plate 40, fig. 2 



