590 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



Plate 105. 



Tretranychus willamettei. 



Fig. 1. Penis, lateral view (owing to the opaqueneas of body the innermost portion of 

 penis was not clearly revealed). 



2. Right eye and basal portion of subfrontal bristle, from above. 



3. Tarsal extremity, dorsal view. 



4. Collar trachea (viewed from right side). 



5. Tarsal appendages (lateral view), showing onychium, claw, and tenent hairs. 



6. Extremity of right palpus (\dewed from outside) showing "thumb," "fingers," 



claw, and hairs. 

 Figures 1, 2, 3, 4, 5, and 6 drawn with oil-immersion lens and camera lucida, 

 Plate 106. 

 Tetranychus ilicis. 



Fig. 1. Right leg I, ventral view. 



2. Tarsal appendages (lateral view), showing onychium, claw, and tenent haira 



(on Chinaberry from Florida). 



3. Frontal and subfrontal bristles (frontal bristle shown only in part). 



4. Tarsal appendages (lateral view), showing onychium, claw, and tenent haira 



(on holly — Ilex opaca). 



5. Three of dorsal bristles, showing attachment in tubercles. 



6. Extremity of right palpus (viewed from outside), showing "thumb," "fin- 



gers," claw, and hairs. 



7. Collar trachea, from right side. 



Figures 2, 4, 6, and 7 drawn with oil-immersion lens and camera lucida. 



Plate 107. 



Tetranychina rruicdonoughi. 



Fig. 1. Right palpus from outside, showing "thumb," "thumb" spines, claw, and 

 other appendages (lateral view). 



2. Extremity of tarsus, showing claw and its plumose arrangement, onychium, 



and tenent hairs. 



3. Female (dorsal view), showing leg stumps and dorsal appendages. 



4. Extremity of tarsus (ventral view), showing onychium, plumose claw, and 



tenent hairs. 



5. Female (lateral view), showing left foreleg, dorsal and ventral appendages. 



Figures 1,2, and 4 drawn with oil-immersion lens and camera lucida. 



