BULLETIN 270 



EASTERN APHIDS: A FEW SPECIES OF 

 PROCIPHILUS.* 



Edith M. Patch. 



There is evidently still considerable work to be done with 

 the migratory Pemphiginae before we have their life histories 

 in hand. Among the single genus Prociphilus in the Eastern 

 States alone, several unfinished problems are presented. In 

 fact, the complete American food cycle has been ascertained for 

 but two of the species found in New England, — P. tessellata\ 

 and P. venafuscus. 



The second of these, indeed, was not definitely located as to 

 its summer residence until two years ago when the writer se- 

 cured winged material from pupae collected on the roots of 

 young balsam fir, October 19, 191 5 (144-15), though this tree 

 had been under suspicion for several years.! 



P. xylostei, to be sure, has been recorded as a root form on 

 "Fichten" (Tullgren 1909, p. 93) for Europe and its habits in 

 America are not likely to be different. 



Besides P. venafuscus, we have two ash species in the East, 

 P. fraxinifolii and P. approximatus, the alternate host of neither 

 having yet been reported. 



That the several species already mentioned are all easily to 

 be distinguished, a little study of Figure. 5 will show. 



*Papers from the Maine Agricultural Experiment Station : Ento- 

 mology No. 97. 



tl908. Entomological News. p. 484. 



±1913. Maine Agricultural Experiment Station, Bulletin 207, p. 448.. 



