Abdomen isul)jj;lo))o.se, the dorsum l»earing ten pairs of .short, 

 stout, slightl}' curved pectinate bristles; two pairs are situated 

 just alcove the pteromorphie, two pairs on the crown of the dor- 

 sum, two pairs are posterior in position, and four pairs occur 

 around the margin of the abdomen. The pteromorphie are at- 

 tached to the anterior half of the side of the abdomen; are trun- 

 cate in front, and do not extend beyond the anterior margin of 

 the abdomen, (lenital covers about three fourths as long as the 

 anal covers and situated one and a half times their length in 

 fi'ont of the latter. 



Anterior pair of legs about two thirds as long as the body; 

 tarsus and tibia subequal; genual more than half as long as the 

 tibia. The tibia and genual of leg I each bear laterally a very 

 stont, slightly curved enlarged spine, (ienual of leg II with a 

 similar spine. Ungues tridactyle. 



Length. 0.80 mm.; breadth, 0.(50 mm. 



Under old boards. Collected by the writer at Areola, 111. 

 Several specimens. Mr. Banks has confirmed this determina- 

 tion from a specimen sent him by the author. 



Ori/xiid fitr;i'nli( Banks. 

 1906. Oaliiiniui tun/lila, Banks, Proc. Acad. Nat. Sci. Pliila., 1906, p. 493. 



Very light brown; integument smooth. 



Cephalothorax short and wide; lamella? narrow, al)Out 

 half as long as the cephalothorax, broader at the anterior 

 than at the posterior end; trauslamella equal to the lamelLe in 

 width. Ijamellar hairs long, straight and barbed, about one 

 and a third times as long as the lamellae; interlamellar hairs 

 slightly longer than the lamellar hairs; antero-lateral hairs 

 aljout two thirds as long as the lamellar hairs and curved as 

 usual. Pseudostigraatic organ short, subcapitate. 



Abdomen about as broad as long, broadest near the middle, 

 hairless. Pteromorphie small, truncate anteriorly, and not ex- 

 tending beyond the anterior margin of the abdomen. Genital 

 covers slightly over half as long as the anal covers and situ- 

 ated about twice their length in front of the latter. 



