IOWA ACACEMY OF SCIENCES. 93 



Aphis nionardi Oestl. On Monarda punctata (Horse Mint). 



Aphis miniuli Oestl. On Minuilns ringens (Monkey Flower). 



Aphis helianthi Monell. (?) On Ilelianthus gross-serratus. Taken in Tama 

 county and at Ames. 



Aphis sp. On Amaratus albus (?) (Tumble Weed). 



Aphis cardui L. Oa Thistle. 



Aphis sp. Probably A. Asclepiadis Fitch, on Asclepias cornutum (Milkweed). 

 Perhaps the same as S. asclepiadis of last list 



Aphis setaria^ Thos. On Panicum crus-galli (Barnyard grass). 



Aphis eupatorii Oestl. (?; On Eupatorium perfohatum (Boneset). 



Aphis ageratoides Oestl. On Eupatorium Ageratoides. 



Aphis sp-. Probably Aphis lonicera Monell. On cultivated Honey suckles. 



Aphis cenothenc Oestl. On CEneothera biennis (Evening Primrose). 



Aphis maruta? Oestl. (?) On Crataegus coccinea (Hawthorn). 



Aphis frondosie Oestl. On Bidens frondosa (Burr Marigold). 



Aphis euonymi Fab. On Euonymus atropurpurus (Wahoo). Included in prev- 

 ous list under A. rumicis but now considered distinct. It agrees more closely 

 with A. viburni but is given as a distinct species by Buckton. 



Aphis cratnegifbliiis Fitch. On Crataegus tomentosa (Thorn). 



Hyalopteras pruni Fab. On Plum and Choke cherry. 



Hyalopterus arundinis Fab. Pruni Fab. (?) On Phramites communis. At first 

 only the winged form of Hyalopterus pruni was found on the plum, and in no case 

 was the apteious viviparous form found. The blades of Phragmites showed that 

 the Aphids had been there for some time and probably for most of the summer. 

 Pupa; of both the 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 Phragmites. Slight differ- 

 ences may be noted in color evidently due to age. Hence it seemed more than 

 probable that this aphid migrated from the grass to leaves of some of the plum 

 family to deposit the oviparous females; these 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 individuals, and these deposited 

 eggs around the buds. 



Monelliacaryella Fitch. On Hicoria alba and amara. One specimen listed in 

 previous list, a single specimen from a small colony having been secured a few 

 years ago (1889). The species was rather common this season, a point of interest, 

 since this species was for some thirty years after its description by Fitch unrecog- 

 nized by any other entomologist, but was a few years ago recorded in Minnesota 

 by Mr. Oestlund about the same time our speciman was taken here. 



Callioterus bellus Walsh. On Quercus coccinea. (?) In markings this resem- 

 bles Monellia. 



Callipterus asclepiadis Monell. On Asclepias cornutum. 



Callipterus discolor Monell. On Oak. This and the preceding seem to be iden- 

 tical so far as descriptive characters go even when compared side by side in fresh 

 specimens. It seemed possible that they move from Milkweed to Oak in autumn, 

 but egg-laying broods and eggs were found on both plants. 

 Callipterus sp. On Quercus raacrocarpa, and coccinea. 



Callipterus sp. Probably the same as Chaitophorus spinosa Oestlund. On Quer- 

 cus macrocarpa. 



