ORIBATOIDEA SINENSIS I 121 



Color. — This species is generally quite opaque and of a 

 dark brown color making it difficult to study in detail. 

 Figures 1 and 2 have therefore been made with the right 

 half as seen by transmitted light in balsam in toto mounts 

 and the left half of the figure has the detail included and 

 shadows from internal structure eliminated. 



Form. — The general shape of the body is broadly 

 pyriform (more the shape of the native Chines^ pear), 

 flattened on ventral side, not at all depressed though very 

 broad for this group. 



Cephalothorax short and broad; frons strikingly convex 

 and rounded, sloping abruptly into the rostrum, with a 

 distinct narrow, well-rounded groove running subparallel to 

 lamellae and its own width from them; rostrum projecting 

 beak-like beyond dome-like bulge of frons; rostral hairs 

 moderately long, distinctly incurved near tip; lamellar hairs 

 subequal to rostral hairs, anterior to lamellae and just 

 lateral to termination of cephalothoracic grooves; inter- 

 lamellar hairs remote from each other, so short as to be 

 difficult to see; lamellae closely appressed to cephalothorax 

 though distinct and protruding as an elongated ridge 

 not reaching far posteriorly, passing onto ventral side of the 

 cephalothorax and curving mesiolly to join the side of the 

 camerostome (see fig. 2), contours rounded; sides of 

 cephalothorax bulging laterally; pseudostigmatic organs 

 medium long, generally not surpassing lateral edge of 

 pteromorphae when viewed from above, strongly elbowed at 

 proximal end, rigid, very slightly sinuous distally, slender, 

 distinctly and gently swollen distally. This portion 

 roughened by dull thorn-like protuberances (see fig. 3), the 

 tip somewhat blunt, often with one or more fine awl-shaped 

 protrusions; pseudostigmata flush with surface, oval, the 

 chamber cylindric but constricted to half the diameter of 

 its aperture; tectopedia small, band-like, extending from 

 postero-lateral angles of cephalothorax down the side of 

 the cephalothorax just posterior to and parallel with the 

 lamellae, tapering to a point half way down the cephalo- 

 thorax, thus closing the space between the lamellae and the 

 pteromorphae. 



Notogaster (fig. 1) high, broad, smooth, anterior ed§e 

 distinct, posterior edge broadly overlapping vertral plate; 

 areas poros© (visible in balsam in toto mounts by transmit- 

 ted light) • adalares medium long, wide at base, constricted 

 behind base and gradually tapering to a blunt point; posterior 

 mesonotal large, decidedly remote from each other, circular, 



