August, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 30^ 



The Apterous female is paler, with the thorax and head j'ellowish-green. 

 The cornicles are short and pale ; legs pale yellow, tarsi dusky ; abdomen pale 

 green ; antennae green, one third as long as the body. There is also a rufus 

 form of the apterous viviparous female. Found during the year on Senecio 

 mikanioides. It infests the younger shoots and leaves. 



Aphis sp. ; 



A small doubtful species found on both Groundsel (Senecio) and 

 Amsinckia. The apterous females are green throughout. The 

 alate form has short black cornicles, black bars and spots on the 

 dorsum of the abdomen and the head and thorax black. 



Rhopalosiplmm dianthi Schrank; Sonchus. 



Taken in the fall on Sonchus oleracea, also on the celestial pepper 

 in a greenhouse. I bred from this insect a very minute wingless 

 dipterous parasite. 



B. violce Pergande; Viola. 



Found on the cultivated blue violet in May. This form seemed to 

 serve as a link between Pergande 's species and that of Essig 

 (Pomona Journal of Entomology No. 1), having the characteris- 

 tics of both, which appear to me like identical species, despite 

 slight differences in descriptions. 



Rhopalosiphum sp. ; Almond. 



On the stems of a young almond in May I found an aphid (ap- 

 parently a Bhapolosiphum) . This is a large red species. 



Hyalopterus arundinis Faber; Plum. 



In large quantities on the plum in May. 



Myzus achyrantes Monell; Malva parviflora. 



Found commonly on mallow (M. parviflora). I bred a small 

 Aphidius from this species. 



M. persicce Sulz. ; Peach. 



On the peach and plum trees in ^May. 

 Drepanosiphum acerifolii Thos. ; Acer saccharinum. 



This beautiful species inhabits the leaves of the soft maple (A. 

 saccharinum). The winged forms are very' active and possess 

 considerable jumping powers. 



SipJiocoryne salicis Monell; Salix. 



Found in both the apterous and alate forms under the leaves of 

 willow in April. 

 S. xylostei Schrank; Lonicera. 



This European species infests the tips of branches of the honey- 



