OF WASHINGTON, VOLUME XII, lulu 11 



die, tip broadly rounded; dorsum with a median, oblong, shallow depres- 

 sion, no hairs apparent above; at tip are four clavate hairs and over the 

 base of each outer one is a smaller, inconspicuous one. Legs very 

 stout, especially the basal joints, roughened, all, except tarsal joints, 

 with a long, appressed, clavate, scale-like hair on each side: tarsi with 

 some simple hairs; patella- and tibia? Ill and IV with an irregular 

 swelling below; but one claw. Coxa? all distinct; venter with the geni- 

 tal and anal apertures approximate, the former the larger, much as in 

 N. anauniensis C. and F. 



Length, 0.7 mm. 



From Austin, Texas; in nest of Eriton cwcum (Brues). 



Nothrus carinatus, new species. 



Reddish yellow, legs paler. Cephalothorax narrowed near middle, but 

 blunt in front, with a pair of stiff, curved bristles near tip, a ridge each 

 side extending out to the pseudostigma ; the pseudostigmatic organ is a 

 moderately long bristle, finely serrate, but not clavate. Abdomen about 

 one and one-half times as long as broad, broadest behind the middle, on 

 the posterior side with four curved bristles each side, none clavate; a 

 short clavate humeral bristle, and a submedian row of four simple hairs; 

 two ridges each side on the dorsum; one is sub-median just within the 

 sub-median row of hairs, the other is sub-lateral, and curved outward 

 toward tip. Venter with the genital and anal apertures connate, the 

 latter nearly twice as long as the former; coxae all distinct, that of I and 

 II broad at base, III and IV pointed at base. Legs short, all joints 

 (except tarsi) with curved thickened bristles, but none clavate; tarsi 

 with many long, fine, simple hairs; one large claw. 



Length, 0.7 mm. 



From Great Falls, Virginia, under moss. 



Hypochthonius texanus, new species. 



Body about twice as long as broad, the sides of abdomen nearly par- 

 allel. Cephalothorax scarcely one-half as long as abdomen ; it shows 

 some grooves above and each side five fan-like hairs, one in front, one on 

 middle of lateral margin, one near posterior corner, one in front above 

 the margin, and one near the pseudostigmatic organ ; the latter is a sim- 

 ple bristle, not very long. The abdomen above shows four transverse 

 furrows, two rows each side of four fan-like hairs, one marginal, and the 

 other submarginal and six similar hairs around the posterior margin. 

 The genital aperture is square ; the anal is one and one-half times as long 

 as broad, as wide as the genital opening, and close to it; each flap, or 

 door, has four scale-like hairs upon it, the last the broadest, and each 

 side of the anus are two broad scales. The sternal region is very- 

 broad, so that the legs are widely separate, III pair at corners of a very 

 broad plate, IV pair rather closer together than III pair, and from a 

 plate longer in the middle. All legs short, and with scale-like hairs 



