JOTTINGS ON APHIDES. 211 



same month, and a diligent search revealed but two live alate 

 forms. S. sojichi, Linn., in its apterous form, is one of our com- 

 monest species on Centaiirea nigra in May ; on the 31st I have 

 taken several " stung " females, from which the Braconid, 

 Aphidius (jranarius, Marsh., emerged on June 1st, and sub- 

 sequently several Cynipids ; the same form was found on Cnicus 

 arvensis in August. This species does not attack Sonchus 

 oleraceus, which was abundant in this vicinity till quite the end 

 of July, when the apterous and alate forms, together with their 

 pink (not black, as on knapweed) larvae, are abundant in the 

 heads and on the stems, and have continued so to the present 

 time ; on August 13th last year I observed a female Bassus 

 tarsatoriusy Panz., investigating, without apparently attacking, a 

 brood of these Aphids. There is no Cichorium intybus here, but 

 I have found larvae, pupae, and apterous imagines (a few of which 

 latter were "stung") of S. cichorii, Koch, upon the stem, just 

 below the flower, of this plant near Easton Park, Suffolk, on 

 August 17th ; no winged specimens were seen there nor on the 

 same plant at Dunwich, in Suffolk, where it occurred sparingly 

 in September. Five S. olivata, Buck., were taken on Cnicus 

 palustris in the Bentley Woods, near Ipswich, August 11th, 1904. 

 I have searched in vain (fortunately) for S. lactucce, Kalt., and 

 (unfortunately) for S. convolvuli, Kalt., in my garden. 



The small Phorodon humidi, Schr., was abundant, though I 

 could detect no winged forms and but few apterous imagines 

 covering the under side of leaves of Ilumulus lupulus, near Easton 

 Park on August 17th last ; ■•and a protracted examination of 

 Lamium album in my garden revealed a solitary winged and 

 active P. galeopsidis, Kalt., on the under side of a leaf, on the 

 2nd of the same month. On June 7th, 1907, twenty-three Myzus 

 cerasi, Fab., in all its stages though only two winged, were given 

 me from Prunus cerasus in this parish, where it is doubtless but 

 too common ; and early in August I have found M. ribis, Linn., 

 rarely on the under side, near the midrib, of leaves of Ribes 

 rubrum in my garden — larvae were then the commonest form, and 

 only one alate specimen was seen. Quite suddenly, on August 

 4th last, Drepanosiphum acerina, Walk., appeared commonly be- 

 neath maple-leaves and the adjacent hazel and Cornus sauguinea ; 

 the winged form is always much the commoner, though I have seen 

 three apterous ones beneath a leaf with it and many more singly. 

 It is the most active Aphid I know, and takes flight at once, in 

 sun or shade, upon being disturbed, though more sluggish towards 

 dusk ; it also possesses a feeble power of leaping. Apterous 

 females, larvae, and pupae of the distinct and presumably rare 

 Megoura vicice, Buck., were found very commonly feeding upon 

 the pods and stems of one plant of Lathyrus pratensis in a meadow 

 near Easton Park on August 17th last. Early in June Rhopalo- 

 siphum ribis, Linn., has been found in hundreds in all its stages 



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