212 A'Iaine Agricultural Experiment Station. 1919. 



Type in the collection of the Maine Agricultural Experi- 

 ment Station, No. 44-14. 



MACROSIPHUM ONAGRAE N. SP. 



Alate viviparous female : general body color stem green 

 with abdomen immaculate, thorax olive brown, cauda green 

 sometimes dusky at tip, cornicles black, veins in both wings 

 slender and almost black. Frontal tubercles large and strongly 

 divergent. Relative lengths of antennal segments III to VI 

 indicated by 60, 45, 38, 10-I-70, III with about 20 sensoria in a 

 somewhat irregular row, IV without sensoria. Anal vein of 

 fore wing about the same length as antennal III. Cornicle about 

 as long as IV and with its distal one-fourth or more reticulated. 



(153-12.) 



Apterous viviparous female : general body color stem green 

 and immaculate. Relative lengths of antennal segments III to 

 VI indicated by 55, 40, 39, 10+60. Ill with 5 to 8 sensoria 

 in row. Cornicle shorter than III but nearer III than IV. 

 (66-10). 



Apterous oviparous female : relative lengths of antennal 

 segments III to VI indicated by 45, 35, 35, 10+65, HI with 4 

 to 8 sensoria in an uneven row. Cornicle about as long as IV. 

 Hind tibia, at widest part, double the width of the others and 

 excessively crowded with sensoria (119-06). 



This species comes near specimens of Macrosiphum gaurae 

 Williams I have received from the west but is either distinct or 

 the range of variability for the species is unusually great. It 

 is the common Macrosiphum on evening primrose, Oenothera 

 biennis L. in Maine and inhabits the stems of the flower cluster 

 especially. This was taken first in 1905 and has been common 

 ever since. 



Type in the collection of the Maine Agricultural Experi- 

 ment Station. 



MACROSIPHUM PSEUDOCORYLI N. SP. 



Alate viviparous female : general body color green with 

 chestnut brown thorax and dusky antenna and cornicle. Frontal 

 tubercles large. Comparative length of antennal segments III 



