496 PROCEEDINGS OF THE ACADEMY OF [NoV., 



Notaspis castanea n. sp. 



Color, red brown, legs paler. Cephalothorax with a broad lamella 

 each side, nearly touching before the tip, the tip deeply excavate, 

 leaving a sharp point each side, from middle of tip arises a long simple 

 bristle; superior bristles short, erect; pseud ostigmatic organ short and 

 fusiform, with a pointed tip, in length not more than one-third the 

 width of the cephalothorax. Abdomen somewhat longer than broad, 

 broadest in middle, dorsum minutely punctate, without bristles. 

 Wliole under surface of body strongly punctate, and uniformly so; 

 genital aperture twice its length in front of the larger anal opening, 

 the latter longer than broad. Sternal plate transversely divided by a 

 furrow much nearer to the posterior than to the anterior margin. Legs 

 rather slender, IV longer than wddth of body at that point; tarsus I 

 shorter than the tibia; a sharp-pointed tectopedium behind coxa I. 



Length .95 mm. 



One specimen from Humboldt, Cal. 



Notaspis cartonaria n. sp. 



Color, shining jet black, legs yellowish. Cephalothorax with a 

 broad lamella each side, extending beyond head, tip excavate, but the 

 inner point much longer than outer, from middle of tip arises a long 

 simple bristle; superior bristles as long as cephalothorax, simple; 

 pseudostigmatic organ slender, simple, rather longer than one-half the 

 width of cephalothorax. Abdomen elongate, more than three times 

 as long as cephalothorax, and tapering behind; densely pitted above 

 and below. Venter with a curved ridge behind, extending forward each 

 side in front of anal aperture, and almost traceable to hind coxae. 

 Genital apertiu-e with hind border about as far forward as hind margin 

 of hind coxfe, fully three times its length in front of the anal aperture, 

 the latter nearly twice as broad and twice as long as genital opening. 

 Sternal plate divided by a transverse furrow. Legs short and weak, 

 IV not more than two-thirds of width of body at that place; all tarsi 

 short, the first much shorter than tibia I, and bearing a hair beyond 

 its middle more than one-half longer than joint; claws three. 



Length 1.4 mm. 



One specimen from Humboldt, Cal. 



Oppia spinipes n. sp. 



Color, pale yellowish brown, legs paler, lamellse blackish. Cephalo- 

 thorax with a pair of low, submedian lamellae, the apical third free, and 

 terminating in a long barbed bristle; a short lamella each side near apex 

 of head, and ending in a short bristle; superior bristles long, porrect, 



