106 PSYCHE [December 



Orihata albida n. sp. 

 (Figs. 4, 5.) 



Very pale yellowish hroAvn; inteo-ument finely j)iiiKtate, especially on the 

 pteromorphae. 



Cephalothorax two-thirds as broad as long; lamellae long and narrow, two- 

 thirds as long as cephalothorax; without cusps, broadest in the middle; no trans- 

 lamella. Lateral lamellae present ; very narrow and al)out two-thirds as long as 

 lamellae, each bearing a long, stout, curved, pectinate bristle. Lamellar hairs 

 rather short, one-half as long as lamellae, and extending almost to the tip of rostrum 

 Interlamellar hairs situated in approximation to the base of the lamellae and slightly 

 longer than the lamellar hairs. Pseudostigmatic organ strongly recurved with long 

 peduncle and slightly pectinate, clavate head. 



Abdomen two-thirds as broad as long; pteromorphae not extending beyond 

 the anterior margin of abdomen; triangular, anterior free edge concave. Genital 

 covers small, about two-thirds as long as anal covers, situated about two and one- 

 half times their length in front of the latter. Abdomen hairless. 



Anterior pair of legs almost as long as abdomen. Unguis tridactyle. 



This species resembles 0. clavij)ectinaia Ewing somewhat, but it is of a much 

 lighter color; the pseudostigmatic organs are very slightly pectinate, instead of 

 being strongly pectinate, and the interlamellar hairs are approximate to the base of 

 the lamellae, instead of being in the normal position. 



Length, 0.44 mm.; breadth, 0.28 mm. 



Under old boa-nls. Collected by writer at Tuscola, Illinois. ]\Iany specimens. 



Orihata corpiisriila n. sp. 

 (Figs. (), 7.) 



Dark brown; integument heavily chitinized, surface smooth. 



Cephalothorax very long, being about one-half as long as the abdomen and 

 almost hidden above by the laige lamellae, which extend the entire length of the 

 cephalothorax and project slightly beyond the tip of the rostrum. Lamellae about 

 one-third as broad as long, being broadest across the middle; lamellae usually con- 

 tiguous. The lamellar hairs arise fro:-n the corners of the lamellae next the median 

 line and are short, straight, and pectinate. Pseudostigmata cylindrical; pseudo- 

 stigmatic organ clavate, two-thirds as long as the cephalothorax. 



