140 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



tibiae and patellae thicker and more plumose than others ; tarsi extremely 

 slender. Venter smooth; sternal plate with a line each side, ventral 

 openings distinctly separate, the genital broader but no longer than the 

 anal. 



Length, 0.45 mm. 



From Guelph, Ontario, Canada ; under bark of ironwood, 

 March 6. 



Oribata perolota, new species. 



Yellow-brown. Cephalothorax with a pair of small apical bristles, 

 a median pair of quite long bristles, and a superior pair of short erect 

 bristles ; pseudostigmatic organ moderately long and clavate. Abdo- 

 men a little longer than broad, smooth, bearing above on each side six 

 quite long curved bristles : one near the tip, four near the side-margin, 

 and one sub-median and toward the tip ; genital aperture nearly twice 

 its length in front of the very much larger anal opening; anterior 

 sternal plate divided by a complete line, posterior sternal plate indented 

 by the genital aperture, without marks or lines. Legs long and slender, 

 joints slightly nodose, the short middle joint is not swollen; the tarsi 

 with many fine hairs, a few on the other joints, a long one near tip of 

 penultimate joint of leg I; trochanter of leg III prominent, globose; 

 one claw to tarsus. 



Length, 0.45 mm. 



From Guelph, Ontario, Canada ; in corn stubble, April 26. 

 Related to O. concolor as figured by Berlese, but he shows 

 more bristles on dorsum. 



Oribata neosota, new species. 



Dark yellow-brown, legs paler. The cephalothorax is quite long and 

 humped at base and before the tip, the sides irregularly trilobed; a 

 sub-apical projection each side in front, a pair of short fine apical hairs, 

 a curved bristle each side on middle lobe ; superior bristles very long and 

 simple ; pseudostigmatic organ not very long, sub-clavate. Abdomen 

 longer than broad, nearly smooth, with six curved hairs above on sides 

 and near tip. Legs rather short ; behind coxae I and II are large 

 tectopedia; leg I not near as long as body, leg IV almost as long as 

 body; the middle joint of legs very small and not swollen. Venter 

 smooth ; the genital aperture distinctly separated from the scarcely 

 larger anal opening ; anterior sternal plate with a line each side, the 

 posterior sternal plate undivided, but deeply indented by the genital 

 aperture. 



Length, 0.45 mm. 



Guelph, Ontario, Canada; from among forest leaves; 

 April 28. 



