Acarina from Claremont-Laguna Region 
The present list is from specimens collected during the past years. The determina- 
tions are by Dr. Nathan Banks. 
Dermanyssus gallinae Redi. From chickens, some from other situation. 
Parasitus frontalis Bks. From wild mouse. Laguna Beach. 
Farasitus sp. Not mature. Free living, Claremont. 
larasitus sp. Free living, not mature. Chino Swamps. 
Anystis agilis Bks. Claremont, on ground. Abundant in March, 1918, and also in 
other years. Small red. 
Trombidium pacificum Bks. Medium sized dark red, from ant’s nest also from Evey 
canon. 
T. claremonti Bks. Evey canon. 
T. magnificum Leconte Mts. near Claremont, 8,000 ft. elevation. Large dark red mite. 
Johnston Col. 
Trombidium sp. Near Camp Baldy, 4,500 ft. elevation. . Johnston Col. 
Bdella pergrina Bks. Claremont, Calif. Common. Also Chino Swamps. 
Penthaleus bicolor Bks. Spherical, dark body, red legs. Common Claremont in spring. 
Tarsotomus terminalis Bks. Small mites. Head of San Dimas canon. 
Erytheus hiltoni Bks. Claremont. 
Erytheus sp. not mature. Claremont. 
Macrocheles sp. Chino Swamp. 
TICKS 
drgas miniatus Koch. Large ticks, exact location of capture unknown. 
Dermacentor occidentalis Neum. Mts. near Claremont. Pudding stone canon, Evey’s 
canon. 
Heamaphysalis leporis palustris Pack. On rabbit, Claremont. 
ixodes californicus Bks. Laguna Beach. Also on dog, Claremont. W. A. H. 
(Contribution from the Zoological Laboratory of Pomona College) 
