JOURNAL OF ENTOMOLOGY AND ZOOLOGY 135 



tlie wliole length of the cephalo-thorax. Lamellar hairs short, 

 curved, aud situated on the anterior ends of the lamelljE ahout 

 one-half the distance from the base of the same to their upper 

 edges. Interlamellar hairs absent. Pseudostigmatic organs 

 long, lance-shaped and slightly recurved. Abdomen globular, 

 nude. Pteromorpha? rigid, extending forward almost to the 

 tip of the ce])halo-thorax, notched at their tips. Ventral plate 

 as broad as long, shield-shape. Genital opening at the anterior 

 margin of ventral plate; as broad as long, and situated about 

 twice its length in front of the anal opening; genital covers 

 triangular. Anal opening much larger than genital ojiening 

 and situated about one-half its width from the posterior margin 

 of ventral plate ; anal covers rectangular ; twice as long as broad. 

 Legs moderate ; posterior pair not reaching as far as the pos- 

 terior margin of the abdomen. Total leng-th of body, 0.86 mm. ; 

 width, 0.60 mm. 



From the top of Mt. t'hintimini, Oregon; imder a rotting log; 

 l»y the writer. 



Described from four specimens. I can find no individual vari- 

 ations in any of them. 



Family PIOPLODERMID^ 



Genus Phthiracanis Perty. 



Phthiracarits vuLihinis n. sj). 



(Fig. 6) 



A large dark brown species. Integument granular, of medium 

 thickness. Cejjhalo-thorax about two-thirds as high as long, and 

 bearing dorsally three pairs of large bristles. The posterior pair 

 of bristles is about as long as the cephalo-thorax itself; the 

 middle pair is slightly shorter; the anterior pair is slightly 

 shorter than the middle pair. Pseudostigmata circular, shallow; 

 in diameter about equal to the width of femur of one of the legs. 

 PseudostigTuatic organ small, stoutlj^ setiform. Abdomen about 

 one-half as high as long, and bearing several prominent bristles, 

 including five dorsal pairs. Posterior end of abdomen pointed. 

 Genital covers about two-thirds as long as anal covers. Each of 



