1918] ECONOMIC ZOOLOGY ENTOMOLOGY. 463 



producing young, hence there are many generations during the summer breed- 

 ing season. The last brood of suuuuer females produces a generation of 

 winged males and wingless females by which the overwintering egg is deposited. 

 At first this egg is greenish but in a few days becomes jet black. 



The adults of this species are somewhat more restless than most other 

 aphids and migrate freely from one place to another, thus field-sprayed plants 

 are highly subject to reinfestation. It is pointed out that the matter of reinfes- 

 tatiun of plants by migrants should receive careful consideration when control 

 measures are being planned. 



In recording its host plants the authors have limited their records to those 

 upon which the female aphid was found producing young. Those heavily 

 infested include t,he potato, tomato, eggplant, pepper, and sunflower. Those 

 commonly but not heavily infested include the jimson weed, ragweed, lamb's- 

 quarter, sweet potato, canna, hollyhock, and matrimony vine. The hosts not 

 commonly infested include corn, beans, moth muUen, plantain, curly dock, 

 smartweed, shepherd's purse, catalpa shoots, ground cherry, and pokeweed. 

 In addition to these Patch has recorded it on Iris sp., Gladiolus sp., red root pig- 

 weed, turnip, garden pea, apple, pepper vine, cultivated aster, cineraria, and 

 Lactuca sp. Thus it appears to be a cosmopolitan feeder, which complicates its 

 control. 



Four species of hymenopterous parasites, namely, Aphidius polygonaphis, 

 Pachyneuron aphidvoruin, and two species of Lygocerus are said to have been 

 remarkably abundant. Nine species of lady beetles in the adult stage were 

 observed feeding upon the aphids, of which Hippodamia convergens was the 

 most common and Cocvinella 9-nntata second in importance. The larvae of three 

 species of Syrphus flies were found commonly feeding upon the aphids, namely, 

 Syrphus americanus, Sphaerophoria cylindrica, and AUoyrapta ohliqua. The 

 chipping sparrow, quail, English sparrow, and domestic fowl were observed 

 actively feeding upon plant lice, and a fungus (Enipusa sp.) was of consider- 

 able importance in reducing their numbers. 



Control work of the year led to the conclusion that nicotin sulphate, 1.5 to 2 

 teaspoonfuls to a gallon of water, or about 1 : 500, with enough soap added to 

 form a suds is the most satisfactory spraying material for the control of this 

 species. Two applications or more may be necessary to control the pest 

 and these applications under conditions such as prevailed during 1917 should 

 not be more than three days apart. Both spraying in the early stages of an 

 outbreak and thoroughness of application are essential to the successful con- 

 trol. Because of the wide range of host plants, clean culture is an important 

 adjunct to control measures. It is stated that with proper equipment, proper 

 material, and thorough work this potato pest may be effectively and economi- 

 cally controlled. 



A list of the Aphididse of Japan, with description of new species and 

 genera, S. Matsumura (Jour. Col. Agr. Tohoku Imp. Univ., 7 {1917), No. 6, 

 pp. 35I-414, pis. 2). — The present list contains 81 species representing 29 

 genera, among which 57 species and 15 genera are described as new to science. 



Contribution to the knowledge of the Aphididae, G. del Guekcio (Redia, 

 12 {1917), No. 1-2, pp. 197-277, pis. S; abs. in Rev. Appl. Ent., Ser. A, 5 {1917), 

 No. 7, pp. 334, 335). — This paper deals with the classification of 22 species of 

 aphids occurring in Europe, Africa, and America, many of which are of 

 economic importance while others are new or insufficiently described. 



Francoa elegaiu n. g. and n. sp., which occurs on I'oses in Italy, was the 

 source of more injury than Macrosiphum rosw or Mysus rosarum when 

 observed in June. The black peach aphis has been observed in Italy on peaches 



