8 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



transverse ridge; pseudostigmatic organ large, spatulate, semi-erect, and 

 projecting forward. Abdomen globose, without hairs, wings large and 

 deep, projecting forward, but not very long. Venter with the genital 

 aperture scarcely its length in front of the barely larger anal opening: 

 the genital broader than long and the anal also, but broadest behind. 

 Coxal plate with two short lines each side, hind margin of coxa IV not 

 distinct. Legs short, with simple hairs; three unequal claws. 



Length, 0.3 mm. 

 Falls Church, Virginia. 



The large pseudostigmatic organ reminds one of t>\ <inni- 

 pes, but it is otherwise quite different. 



Galumna pterota, new species. 



Pale yellowish. Elongate; cephalothorax rather large and long, no 

 trace of lamella on side, superior and inferior bristles distinct and quite 

 long; pseudostigmatic long and capitate. Abdomen smooth, without 

 hairs. Wings very large, elongate, evenly rounded beneath. Venter 

 smooth, genital aperture nearly twice its length in front of the much 

 larger anal aperture, the latter with an angulate mark in front of it; 

 sternal plate with three short lines each side, the middle one the long- 

 est, no posterior edge. Legs rather slender ; no thickened hairs, tarsi 

 very hairy, the penultimate joint rather swollen above near tip; hind 

 tibia- slightly curved above. 



Length, 0.4 mm. 



Falls Church, Virginia, under chips in woods, August 11. 



Oribatella valida, new species. 



Color dark red-brown, a prominent yellow spot at base of abdomen. 

 Cephalothorax with a broad lamella each side, truncate and close to- 

 gether at tip, the outer tip sharp-pointed and down-curved, but without 

 an apical bristle, inner with a very stout, thickened bristle; superior 

 bristles also heavy, arising from near the middle of cephalothorax; 

 pseudostigmatic organ long, clavate near the tip. Abdomen rather 

 elongate, narrowed behind, without hairs; wings large, inrolled, evenly 

 rounded below; a distinct tectopedium behind coxa I; genital aperture 

 fully once and a half its length in front of the much larger anal aper- 

 ture, the latter broader than long-; coxal plate with three lines each side, 

 the posterior one much shorter than the others. Legs rather slender, with 

 long, fine hairs; patella II with a very stout spine on the outer side 

 near tip, as long as the joint: claws three, unequal. 



Length, 0.5 mm. 

 Great Falls, Virginia. 



Related to (). si^uala. but the pseudostigmatic organ is 

 longer, and there is no bristle at the outer tip of lamella. 



