120 



ORIBATOIDEA SINENSIS I 



taken the next day from a coating of fine moss at the foot 

 of a northerly exposed brick wall. 



They differ from the description and drawing of Oude- 

 mans (loco citato), in having a slightly longer and more 

 slender pseudostigmatic organ whose head is more elongate 

 and slender and drawn out to a fine and bristle-like point, in 

 having a pore posterior to the shorter areae porosae adalares 

 and another between the pore mesial to these areae porosae 

 and the large mesial pore, and other minor details. The 

 average length of our specimens is 629. 



Distribution. — England, Netherlands, Italy and probably 

 North China. 



Galumna obvius sinensis ssp. n. 



Diagnosis. — Specific: Body large, 8 mm. long, high, 

 dark and opaque; frons vertical; pseudostigmatic organs 

 medium long, somewhat rigid, slender and slightly fusiform; 

 interlamellar hairs very short and inconspicuous; cephalo- 

 thoracic bristle formula: pst. o. 1, il. h. 4, 1. h. 2, r.h.3; 

 anterior edge of notogaster - distinct; pteromorphal groove 

 wide, strongly accentuated by thickened side, with a pore 

 anterior to it; pteromorphal nervures rather numerous, 

 linear, crenelate. 



Subspecific : Pseudostigmatic organs slender but clavi- 

 form, gently sinuate distally, roughened about the distal end 

 by spine- or thorn-like protuberances, size smaller, .7 mm. 

 long. 



Dimensions. — (Twelve specimens measured) 



Total length of body ... 



Length of notogastral plate ... 



Breadth of notogastral plate ... 



Length of pteromorphae 



Distance between interlamellar hairs 



Length of ventral plate along median line .. 



Length of camerostome 



Breadth of camerostome 



Anterior edge of genital cover to posterior edg 



of ventral plate 

 Length of genital aperture 

 Breadth of genital aperture ... 

 Posterior edge of genital aperture to anterior 



edge of anal aperture 

 Length of anal aperture 

 Breadth of anal aperture 



672(702)747 

 560(564)595 

 510(511)544 

 332(350)353 

 122(136)151 

 484(500)527 

 129(135)144 

 128(133)136 



400(413)433 

 76 ( 83) 93 

 89 ( 91)111 



119(136)153 

 128(138)154 

 145(156)162 



