Vol. XXlx] ENTOMOLOGICAL NEWS. 89 



Peak are most closely related to those found in lower altitudes 

 of the Coast Range Mountains. Seven of the 18 forms were 

 found at lower altitudes, and in two other cases a slightly 

 different variety was recorded for the lower altitudes. It 

 would be interesting to know how closely the beetle mites from 

 Mary's Peak are related to those of the South Pacific and A.sia, 

 but at present we know very little of the mite fauna of these 

 latter regions. 



SOME DISTINCTIVE FEATURES OF THE FAUNA OF THE HIGHER 



ALTITUDES OF MARY'S PEAK. 



One of the most distinctive features of the beetle mite fauna 

 of the eastern part of the United States is the very large 

 number of shiny species in proportion to the rough ones. In 

 this respect we find the fauna of Mary's Peak in harmony with 

 that of the eastern United States. Thirteen of the 18 forms re- 

 corded from the top of the mountain are shiny. We note, 

 among other things, 3 species of Liacarus, all new. We find 

 4 varieties of Hermanniella punctuhita Berlese, the largest 

 number recorded from any one locality. We note the occur- 

 rence of a species of the genus Jitgatala Ewing, a genus in 

 which the pteromorphae are united by a shelf-like chitinous 

 projection from the anterior margin of the abdomen. We note 

 the absence of species belonging to the family Hypochthonidae, 

 and the record of only one species of Hoplodermatidae. 



EXPLANATION OF PLATE III. 



Fig. I. Envelops monticolus n. sp. Left pseudostigmatic organ 

 from above. 



Fig. 2. Eupelops monticolus n. sp. var. siibborealii n. var. Left 

 pseudostigmatic organ from above. 



F%- 3- Achipteria orcgonensis n. sp. Left pseudostigmatic or.nan 

 from above. 



Fig. 9. Oribatclla aciita n. sp. Left lamella from above. 



Fig. 10. Liacarus bidcntatus n. sp. Tip of left lamella and its 

 lamellar hair from above. 



Fig. ii. Liacants robustvs n. sp. Left pseudostigmatic organ from 

 above. 



Fig. 12. Liacarus acquidentatus n. sp. Left pseudostigmatic organ 

 from above. 



