236 



Tvitli greater certainty and it might be wiser to hold these notes for 

 future proof. Experience, however, has shown that it is often inii)ossi- 

 ble to find material for continuous study in any one locality and we 

 hope that the publication of the facts gathered so far may assist in the 

 collection of proof relating to the exact cycles of some of the migra- 

 tory species in this interesting group. We are aware, of course, of the 

 studies of Lichtenstein and others in this field, but only a portion of 

 the papers containing their results are accessible at present, and so far 

 as we know no observations have been made on the particular species 

 here mentioned. So that in any case they may be considered independ- 

 ent observations and, if duplicating work already done, furnish con- 

 firmatory evidence. 



Siplionopliora sp. — Found abundantly on leaves of Hop Hornbeam 

 {Ostrya virginica). It is apparently identical with S. geranii Oestlund, 

 on geranium and we suspect will be found to be migratory between 

 these two plants. 



Bhopalosiplmm nymplicece L. — On Nymphcea odorata^ PondLily. What 

 is apparently the same species occurred also on the Arrow Leaf, Sagit- 

 taria variahilis, and this may doubtless be considered as a host plant. 



Hy (dopier us pruni Fab. — On Plum and Choke Cherry. 



Hyalopterus arundinis Fab. — (= pniniFab. ?). — On Flirag:inites com- 

 munis. At first only the winged form of Hyalopterus pruni was found 

 on the Plum and in no case was the apterous viviparous form found. 

 The blades of Phragmites showed that the Aphidids had been there 

 for some time and probably for the most of the summer. Pupae of both 

 viviparous females and of the males were found in the colonies on 

 Phragmites. There is no difference in structural characters of the 

 winged viviparous forms found on Plum and those found on Phrag- 

 mites. Slight differences may be noted in color, evidently due to age. 

 Hence it seemed more than jDrobable that this Aphidid migrated from 

 the grass to leaves of some of the plum family to deposit the oviparous 

 females, the latter depositing their eggs around the buds. 



Winged forms were taken from the grass and confined on leaves of 

 Plum. These winged forms established colonies of oviparous individ- 

 uals and these deposited eggs around the buds. 



MoneUia caryeUa Fitch. — On Hicoria alha and amara. One sjieci- 

 men listed in previous list, a single specimen from a small colony hav- 

 ing been secured a few years ago. The species was rather common 

 this season, a i)oint of interest, since this species was for some thirty 

 years after its description by Fitch unrecognized by any other ento- 

 mologist, but w^as a few years ago recorded in Minnesota by Mr. Oest- 

 lund about the same time our specimen was taken here. 



Callipterus heUus Walsh. — On Quercus coccinea f In markings this 

 resembles Monellia. 



Callipterus asclepiadis Monell. — On Asclepias cornutum, 



Callipterus discolor Monell. — On Oak. This and the preceding seem 

 to be identical so far as descriptive characters go, even when compared 



