46 Trans. Acad. Sci. of St. Levis. 



E. galiobiua (Can.) — Galium verum L., G. lucidum All. 

 E. artemisiae var. suMilis (Nal.) — Artemisia campestrls L., A. vul- 

 garis L. 

 E. centaureae (Nal.) — Centaurea amara L., C. maculosa Lam., C. scv 



biosa L. 

 E. oleivorus Ashmead — On orange and lemon. 



Phyllocoptinae. 



PHYLLOCOPTES Nal. 



Ph. dubius (Nal.) — ^Avena pratensis L., Bromus arvensis L., B. errectus 

 Huds., B. mollis L., B. sterilis L., Dactylis glom- 

 erata L. 



Ph. comatus (typicus) Nal. — Corylus avellana L., C. a. var. fol. lasc. 



Ph. reticulatus Nal. — Populus alba L., P. tremula L. 



Ph. magnirostris Nal. — Salix fragilis L., S. purpurea L., S. alba L. 



Ph. parvus Nal. — Salix alba L., S. purpurea L., S. sp. 



Ph. eurynotus Nal. — Torilis infesta Curt., T. anthriscus (L.). 



Ph. schlcchtendali Nal. — Pirus malus, P. communis L. 



Ph. fockeui Nal. & Trt. — Prunus cerasus L., P. domestica L., P. mar 



haleb L. 



Ph. cytisicola Can. — Cytisus nigricans L., C. laburnum L. 



Ph. anthohius Nal. — Galium sllvaticum L., G. uliginosum L., G. verum L. 



EPITRIMERUS Nal. 



E. salicobius (Nal.) — Salix alba L., S. fragilis L. 



E. heterogaster (Nal.) — Clematis recta L., C. cirrhosa, C. alpina (L.). 



E. trilobus (Nal.) — Sambucus nigra L., S. racemosa L. 



OXYPLEURITES Nal. 

 0. carinatus (Nal.) — Aesculus hippocastanum L., A. rubicunda Lois. 



Of about 250 known species of the Eriophyidae I have 

 listed 59 that have been recorded from more than one host 

 species. Of these 59, 50 are found only upon species of 

 the same genus and the remaining 9 are found only upon 

 closely related genera. Thus Eriophyes tenuis (Nal.) is 

 found only on members of the grass family, E. drabae 

 (Nal.) only on members of the mustard family, and E. 

 piri (Pgst.) Nal. only on related genera of the rose family. 



