WARBURTON— THE ACARINA OF THE SEYCHELLES 353 



rods. No divisiou between cephalothorax and abdomen. Abdomen oval, truncated 

 behind, o-lossy but finely punctate ; pteromorphsB roundly prominent in front, moveable, 

 the external border notched at its anterior third. Legs with broad flattened femora, 

 tridactyle. 



Numerous specimens mounted on card by Mr Scott. Mare aux Cochons district, 

 about 1500 ft. and near Pot-a-eau, Silhouette. 



7. Oribata seychellensis, n. sp. (PI. 17, %• 3). 

 Length about "5 nam. 



Cephalothorax rather long, fairly pointed. Lamellar ridges long, with blunt cusps 

 ^ from anterior end, then continuing and converging nearly to the anterior border ; no 

 translamella. Pseudostigmatic organs short thick clavate rods. Abdomen with elegant 

 contour, recalling 0. gracilis; pteromorphse rather short and deep, folded well downwards, 

 and hardly visible dorsally. Texture glossy, but with very fine shallow punctations. 

 Tridactyle. 



Numerous specimens mounted on card. Cascade Estate, about 1000 ft. Also from 

 moss, Mt Alphonse. 



8. Oribata lata, n. sp. (PL 17, fig. 2). 

 Length about "85 mm. 



Texture duU, with minute punctations and rugosities. Cephalothorax broad and 

 short ; lamellas strong converging ridges extending about half the length of the cephalo- 

 thorax and with very slight blunt cusps bearing strong lamellar hairs, and continued as 

 fainter ridges ; a strong translamella. Pseudostigmatic organs fairly long, rather strong 

 curved rods. A slight carina extends backwards from the middle of the translamella. 

 Abdomen as broad as long, presenting a shagreened appearance, with two or three 

 longitudinal strias in the median anterior portion. Pteromorphas moderately long but 

 shallow, deepest anteriorly, rounded in front. Legs tridactyle. 



One specimen, mounted on card, taken in the forest above the Cascade Estate. 



Notaspidinse. 



11. Liacarus piriformis, n. .sp. (PI. 17, fig. 8). 



Length about '8 mm. 



Pear-shaped, with fairly long, tapering cephalothorax and nearly circular glossy 

 abdomen. Lamellse and translamella ridge-like, making the letter A on the cephalothorax 

 with the cross-bar rather anterior. Strong lamellar and inter-lamellar hairs. Pseudo- 

 stigmatic organs fairly long, stout, curved rods with oval tip. Legs long. Femora of legs 

 2 with slight antero-inferior prolongation. Tridactyle. No division between cephalo- 

 thorax and abdomen. 



One specimen (mounted on card) from Mahe, near Morne Blanc ; one .specimen, fioiu 

 moss, over 2400 ft. and four from Mare aux Cochons, both Silhouette. 



4.5—2 



