494 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol.3 



Mar. 4, '91. Aphis pasiinaci on celery, Washington (State?). Insect Life, Vol. 



IV, p. 213. 

 [Oct. 1, '08. On Zizia aurea, Chicago, 111. Apt. and winged.] 



The following average measurements from three collections maj' be 

 of interest : 



In his description of the winged male and wingless oviparous female 

 of H. salicis in Transactions of the American Entomological Society, 

 Vol. XX (1893), p. 297, Weed mentions the characteristic abdominal 

 tubercles referred to above. Camera lucida drawings of the tuber- 

 cles or ''horns" are given in Plate 32, figure 20 from the wingless 

 viviparous female (a = tubercle; b = style) and figure 21 from the 

 winged viviparous female, both drawn to the same scale. 



Oestlund's H. {Siphocoryne) archangelicce may also prove to be a 

 synonym of pastinacce. 



*Hyalopterus arundinis Fabr.: Oestlund, loc. cit. p. 44 {phragmiti- 

 dicola). This species is exceedingly common in northern Illinois, 

 where it thickly colonizes the leaves, usually on the upper surfaces, 

 and along the mid-rib of Phragmitis phragmitis, which grows abun- 

 dantly along country roadsides. 



Rhopalosiphum berheridis Fitch: Davis, Annals Ent. Soc. Amer. 

 Vol, I (1908), p. 254, figs. A common and often abundant species, 

 occasionally in such numbers as to injure the barberry (Berberis 

 vulgaris), a useful shrub in ornamental plantings. First reported by 

 the writer. 



R. nymphaece Linn.: Jackson, Ohio Naturalist, Vol. 8 (1908), p. 

 243, 1 plate. (Aphis aquaticus). In conservatories it often becomes 

 quite troublesome on Philotria canadense and calla. Out-of-doors 

 it is a common aphid on water plants such as NymphcBa, Sagittaria 

 and Lemna. First reported by the writer. 



*R. rhois Monk: Sanborn, Kans. Univ. Sci. Bulk, Vol. Ill, No. 1 

 (1904), p. 64, figs. Often becoming exceedingly abundant on orna- 

 mental sumach, seriously disfiguring and weakening the plants. 



