106 APHID NOTES 



against the bottom; otherwise the specimens may lose their 

 appendages. Credit will be given in all cases. 



Note. — In the June, 1914, number of the Entomological News, 

 an aphis from sugar cane was described as new by myself. Mr. 

 T. E. HoUoway, of the U. S. Bureau of Entomology, should have 

 received credit for collecting the specimens. 



EXPLANATION OF PLATES 



Plate V 



Fig. 1. — Prociphilus fraxini-dipelalae Essig. Antenna and wings of spring 

 migrant from ash. 



Fig. 2.— Prociphilus fraxini-dipelalae Essig. Antenna and wings of fall 

 migrant from Douglas fir. 



Plate VI 



Microsiphum canadensis Williams, alate viviparous female: fig. 1, an- 

 tenna; fig. 2, third antennal segment (much enlarged) ; fig. 4, nectary (enlarged) ; 

 fig. 5, Cauda. Apterous viviparous female: fig. 3, third antennal segment 

 (much enlarged) ; fig. 6, specialized setae on frons; figs. 7, setae on body. 



Microsiphum artemesiae Gillette, alate viviparous female: fig. 8, antenna; 

 fig. 9, third antennal segment (much enlarged), Colo, specimens; fig. 13, do., 

 Oregon specimens; fig. 11, nectary; fig. 12, setae; fig. 15, frons; fig. 16, cauda. 

 Apterous viviparous female: fig. 10, third antennal segment, Colorado speci- 

 mens; fig. 14, do., Oregon specimens. 



Microsiphum oregonensis new species ?, apterous viviparous female: fig. 

 17, antenna; fig. 18, third segment (much enlarged) ; fig. 19, two views of body 

 setae; fig. 20, frons; fig. 21, portion of abdomen showing nectaries and cau a. 



Chaitophorus tridentatae new species, alate viviparous female : fig. 22, head 

 with antenna and a diagrammatic sketch of the arrangement of the special- 

 ized setae; fig. 23, nectary; fig. 24, speciahzed seta (much enlarged); fig. 25, 

 Cauda. 



Plate VII 



Aphis reticulata new species, alate viviparous female: fig. 1, antenna; fig. 

 2, third antennal segment (much enlarged) ; fig. 5, nectary; fig. 6, cauda. Apte- 

 rous viviparous female: fig. 3, prothoracic tubercle; fig. 4, nectary; fig. 7, 

 reticulations on body. 



Aphis oregonensis new species, alate viviparous female: fig. 8, antenna; 

 fig. 9, third antennal segment (much enlarged) ; fig. 10, tubercles on abdomen 

 between cauda and nectaries; fig. 12, cauda; fig. 14, prothoracic tubercle; fig. 



16, nectary. Apterous viviparous female: fig. 11, abdominal tubercles be- 

 tween cauda and nectaries; fig. 13, cauda; fig. 15, prothoracic tubercle; fig. 



17, nectary. 



