52 PROC. ENT. SOC. WASH., VOL. 24, NO. 2, FEB., 1922 



MOUNTAIN ASH see Sorbus. 



MUHLENBERGIA DIFFUSA WilldetlOW 



= M. schreberi Gmelin, q. v. 



SCHREBERJ Gmelin Isosomorpha muhlenbergiae Howard. 



OATS see Avena sativa. 



OPULASTES OPULIFOLIUS (Linne) Kuntze . Megastigmus physocarpi Crosby. 



ORCHARD GRASS see Dactylis glomerata. 



ORCHID see'Cattleya. 



PARTHENOCISSUS QUINQUEFOLIA (Linne) 



Planch Prodecatoma phytophaga Crosby. 



PHAJUS SP Eurytoma phytophaga Girault. 



PHLEUM PRATENSE Linne Harmolita albomaculata (Ashmead). 



PHRAGMITES COMMUNIS Trinius . . . . Harmolita sp. (Riibsaamen). 

 PHYLLOTACHYS BAMBUSOIDES Sieb. and 



Zucc Harmolita phyllotachitis Gahan. 



PHYSOCARPUS OPULIFOLIUS (Linne) Maxim 



= Opulastes opulifolius (Linne) Kuntze, q. v. 



PICEA ENGELMANNI (Parry) Engelmann . Megastigmus piceae Rohwer. 

 PARRYANA Andre 



= Picea pungens Engelmann, q. v. 



PUNGENS Engelmann Megastigmus piceae Rohwer. 



SITCHENSIS Bong Megastigmus piceae Rohwer. 



PINE see Pinus. 



PINUS PONDEROSA Dougl Megastigmus albifrons Walker. 



PISTACIA LENTISCUS Linne Megastigmus pistaciae Walker. 



TEREBINTHUS Linne Megastigmus ballestrerii (Rondani). 



VERA Linne Megastigmus ballestrerii (Rondani). 



PLUM see Prunus spp. 



POA LUCIDA Vasey Harmolita poophila Phillips and 



Emery. 



NEMORALIS Linne Harmolita poae (Schlechtendal). 



PRATENSIS Linne Harmolita captiva Howard. 



poacola Gahan. 



PRUNUS AMYGDALUS Stokes Eurytoma amvgdali Enderlein. 



ARMENIACA Linne Eurytoma amygdali Enderlein. 



samsonovi Vassiliev. 



SPP Eurytoma amygdali Enderlein. 



schreineri Schreiner. 



PSEUDOTSUGA MUCRONATA (Raf.) Sudw. . Megastigmus spermotrophus Wachtl. 

 TAXIFOLIA (Poiret) Britton 



= P. mucronata (Rafinesque), q. v. 



PSIDIUM GUAJAVA Linn6 Syntomaspis myrtacearum Costa 



Lima. 



SPP Eurytoma sp. Costa Lima. 



Prodecatoma sp. Costa Lima. 

 PYRUS SPP Syntomaspis druparnm Boheman. 



