Ib6 (l)R. A. C. OUDEMANS). NKW LIST OF DUTCH ACARI, I. 



C. lam. present; Tibial — 2 almost globular; 



Dors. of Abd. arched in centre with a 



19. / flattened margin E. monilipes. 



No G lam.; Tibia 1 — 2 not globular; no 



flattened margin to Dors, of Abd. — 19a. 



( Four longitudinal ridges on Dors, of Abd. E. quadricarinatus. 

 19ü. \ 



* ! No ridges on Dors, of Abd E. lanceolatus. 



Eremaeus subtrigonus Oudms. 



Length 0,300 m.m. 



This species is intermediate to Eremaeus clavlpect'matus (Michael) 

 and Eremaeus trigonus (Michael). 



Its pseudostigmatic organ has a fusiform head on a straight , 

 thin , smooth peduncle ; the fusiform head has a lateral pectinated 

 membrane (fig. 7). The markings on the cephalo thorax resemble 

 however strongly those of Eremaeus trigomis (Michael). The legs 

 have the common pyriform femora and pyriform tibiae and nearly 

 fusiform tarsi , like Eremaeus longilamellatus (Michael) , Eremaeus 

 lanceolatus (Michael) and Eremaeus splendeiis (C. L. Koch). The 

 abdomen is smooth, its circumference eggshaped, with the point 

 directed backward ; it bears 4 rows of 5 smooth fine hairs each , 

 of about I of the abdomen's breadth. 



Change of the « key » on page 44 of « Das Tierreich, Oribatidae » : 

 Psstg. org. not davate neither fusiform , with 



a setiform distal end E. pectinatus. 



Psstg. org. davate or fusiform with a smooth 

 peduncle — 21a 



I Head of Psstg. org, a pectinated club . .E.clavipectinatus. 

 Head of Psstg. org. fusiform with pectinated 

 membrane E. subtrigonus. 



Eremaeus subpectinatus Oudms. 



Stature (Fig. 5) like that of Eremaeus lanceolatus (Michael), 

 but somewhat stouter, being lanceolatus 0,297 mm., and subpectinatus 

 0,313 mm. (both dutch specimens). Abdomen and céphalothorax 



21. 



