300 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Filament of antennal segment vi not much longer than base of vi. 



Species on barberry berberidis 



II. Species dark brown, wine or green passing part of its life cycle on 



water plants or plants commonly growing in marshy places 



nymphaeae 

 Species on Lonicera xylostei 



Rhopalosiphum Koch. 



R. nymphaeae (Linnaeus). Aphis nymphaeae Linnaeus, Aphis 

 butomi Schrank, Aphis aquaticus Jackson. (Aphis prunorum 

 Dobrowljansky ? Patch I9i4h). Sometimes placed in Sipho- 

 coryne. 



Faun. Suec, Rev. Edn. 260, 1761. 



This aphid winters on plum where it becomes a serious pest 

 during the spring. It migrates to water plants for the summer 

 months. For life history notes see Patch (1915b) and for figures 

 Patch (1914b). 



On Japan plum, Southbury, June 2, 1901. 

 R. prunifoliae (Fitch), (avenae in part of American entomolo- 

 gists) (Aphis fitchii Sanderson). Apple grain aphid. 



Nox. and Ben. Ins. N. Y., i, 122, 1855. 



This is the species most frequently meant when discussed in 

 American literature as Aphis or Siphocoryne avenae. That this 

 species must now be known as prunifoliae is due to the unfortunate 

 preservation of a Fitch type not in accordance with the entire 

 original description of prunifoliae which for the most part is 

 applicable only to cardui (prunifoliae in part of original descrip- 

 tion). 



The apple-grain aphid is treated by Baker and Turner (i9i9g) 

 and Davis (i9i4f ). It is close to Aphis pscudoavenae in structure 

 and habits (Patch 1917b). 

 . On apple, New Haven, 11, 29 Oct., 1909 (A. I. B.). 

 R. serotinae Oestlund. (Fig. 28, 15 ; Fig. 31, 4 and 5.) 

 ■ Aphid, Minn., 76, 1887. 



This strongly characterized aphid with robust veins, smooth, 

 peculiar cornicles, and minute hind wings is found on Solidago 

 serotina. Its comparatively abruptly conical cauda bears the same 

 relation to the rest of Rhopalosiphum that the Anur aphis cauda 

 does to that of Aphis. 



On goldenrod, New Haven, 13 July, 1909 (A. I. B.). 



Liosomaphis Walker. 



L. berberidis (Kaltenbach). Aphis berberidis Kaltenbach. 



Mon. der Pflanz., 95, 1843. 



This barberry species has the antennal contradiction of distinct, 

 though short, frontal tubercles in the apterous females which might 



