666 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



Type locality. — Idaho. 



Type slide.— Cat. No. 24030, U.S.N.M. 



Described from individuals on type slide. This species is at once 

 separated from our other two species of Tetrany china, T. harti Ewing 

 (= T. macdonoughi McGregor), and T. apicalis Banks, and also from 

 T. superba (Canestrini) , by the absence of seta-bearing tubercles on 

 the back. According to Mr. Wakeland, who sent in the specimens 

 of this species, it causes very serious injury to wheat. 



EXPLANATION OF PLATE 125. 

 (Drawings were made by the writer.) 



Fig. 1. Oligonychus americanus, new species. End of tarsus IV (camera lucida 

 drawing with oil immersion lens). 



Fig. 2. Oligonychus major, new species. Tarsal claw (camera lucida drawing with 

 oil immersion lens). 



Fig. 3. Bryobia brevicornis, new species. Dorsal view of cephalothorax (drawing 

 from egg-bearing female). 



Fig. 4. Bryobia longicornis, new* species. Dorsal view of cephalothorax (drawing 

 from egg-bearing female). 



Fig. 5. Raphignathus viridis, new species. Seta from dorsum of abdomen. 



Fig. 6. Syncaligus tridentifer, new species. Last three segments of left palpus from 

 below (lj-inch eyepiece and one-sixth ocular used). 



Fig. 7. Syncaligus quercus, new. species. Right palpus from below (drawn with 

 camera). 



Fig. 8. Tetranychina tritici, new species. Right front leg from above (camera 

 drawing). 



Fig. 9. Tetranychina tritici, new species. Tip of tarsus of first leg on right side 

 (camera lucida drawing with oil immersion lens). 



