32 INDEX. 



Page. 

 phylloxerie. (See Rhizoglyphus pliylloxerse.) 



Pillows, infested by Tyroglyphidee 5 



Pine cones, infestation by Rhizoglyphus phylloxerse 20 



Plums, rotten, infestation by Tyroglyphus americanus 16 



Pollen of honey bees, food of Carpoglyphus passularum 25 



Potato plants, young, infestation by Rhizoglyphus phylloxerx 20 



Potatoes, rotten and scabby, infestation by Rhizoglyphus phylloxera' 20 



pyri forme. {See Ilistiosloinn j)yriforme.) 



Rhizoglyphus agilis, possibly a synonym of Tyroglyphus heteromorphus 18 



description of genus 19 



descriptions of species 20-22 



ecJiinopus, identity 21 



Rhizoglyphus phylloxern; not a synonym 20 



Robin, synonym of hyacinthi 19 



elongatus n. sp., description and food habits 22 



hyacinthi, bibliographic reference 27 



Boisd. =i?. echinopus Megn 20 



description and food habits 21 



enemy to bulbs and roots 5 



the type species 19 



in decaying matter with Histiostoma americanum 12 



injury to roots of vine, stems of carnation, and wax on grafts ... 5 



longiiarsis n. sp. , description and food habits 22 



megnini, identity 21 



phylloxerie, description and food habits - - - 20 



not a synonym of R. echinopus 20 



rhizophagus n. sp., description and food habits 21-22 



table of species 19 



tarsalis n. sp. , description and food habits 20 



rhizophagus. (See Rhizoglyphus rhizophagus. ) 

 ribis. (See Acarus ribis. ) 



Rice, infestation by Tyroglyphus americanus 16 



robustus. (See Glyciphagus robustus.) 



Roots, food of Tyroglyphidfe 5 



rostroserratus. ( See Histiostoma rostroserratus. ) 



Sap, food of Tyroglyphidfe ■.. 5 



Scale-insects. (See also Aspidiotus, Coccids, and Mytilaspis.) 



food of Tyroglyphidse 5 



Monieziella enemies 5 



oyster-shell, association of Tyroglyphus cocciphilus 17 



San Jose. (See also Aspidiotus. ) 



food of Monieziella breritarsis 24 



parasite 26 



Seeds, food of Tyroglyphidae 5 



infestation by Glyciphagus robustus 13 



Tyroglyphus farinie 14 



siro. ( See Tyroglyphus siro. ) 



Sporotrichum globuliferum, food of Tyroglyphus siro, bibliographic reference ... 27 



Sugar beets. {See Beets, sugar.) 



food of Ty roglyphidae 5 



mites (see also Glyciphagus) 5 



tarsalis. (See Rhizoglyphus tarsalis.) 

 terminalis. (See Tyroglyphxis terminalis. ] 



