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dictyospermi and Diaspis boisduvalii on orchids. From Pennsylvania : 

 Cerataphis lataniae on palms. From Idaho : larvae of Cydia pomonella 

 on apples. From New Jersey : Chrysomphahis aonidum, C. scuti- 

 formis, Cerataphis Jataniae and Pseudococais sp. on orchids ; Pseudo- 

 coccus longispinus on ferns ; Parlatoria pergandii on orchids. From 

 New York : Pseudococcus sp. on Cape jessamine. From Ohio : 

 Aspidiotus perniciosus on apples. From Washington : Cydia 

 pomonella on apples. From Iowa : crown gall on nursery stock. 



Patch (Edith M.). Woolly Aphid of Elm and Juneberry {Schizoneura 

 americana, in part, of authors). — Maine Agric. Expt. Sla., Orono, 

 Bull. no. 241, August 1915, 8 pp., 2 fig^. [Received 15th February 

 1916.] 



This bulletin contains an account of the common Aphid causing 

 leaf-curl of the American elm and records the migration of this pest to 

 the Juneberry {Amelanchier). The name Eriosoma (Schizonevra) 

 americanum was, until recently, commonly applied to two distinct 

 species by American entomologists. The first of these is the rosette 

 species of the American elm, which migrates to apple, several varieties 

 of mountain ash [Pyrus sp.) and to hawthorn [Crataegus), where it 

 was known as E. (S.) hinigeruni long before its identity with the Aphid 

 of the elm rosette was suspected. The name E. (S.) americanum seems, 

 therefore, to be left free for the species here dealt with. The earlier 

 members of the family, including the stem-mother, are all wingless, 

 but late in June winged generations occur. These take flight and 

 seek fresh food-plants for the establishment of summer colonies. They 

 fly distances of at least f of a mile if they do not find suitable plants 

 near at hand. They migrate to an entirely different habitat, the 

 Juneberry, which is common in Maine and A^ariously known as shad 

 bush, service berry, etc. When the migrant reaches one of these 

 bushes, it settles upon a leaf and creeps to the underside where it 

 usually remains quiescent for the rest of its life. In a few hours it 

 begins to give birth to young and continues to do so for several days. 

 The young Aphids cling to the underside for a short time without 

 feeding and then migrate to the underground stems of the Juneberry, 

 where they settle in groups. In the autumn a generation of winged 

 females is developed from these, which migrates to the American elm. 

 There each female lays a single egg from which the stem-mother 

 hatches in the spring. Several predaceous insects frequent the elm 

 leaf -curls of this Aphid. In Maine the most common ones are a Capsid, 

 Camptobrochus nitens, the flocculent larva of a Coccinellid, and Syrphid 

 larvae. Where Amelanchier is planted for park or (ornamental pur- 

 poses within the limits of this Aphid's flight from American elm, it 

 would seem desirable to drench the soil at the base of the shrub with 

 Black Leaf 40 or some other good tobacco decoction. This should be 

 done when the colonies are 3^oung and susceptible and likely to be 

 nearer the surface than later in the season. Young elms can be pro- 

 tected by spring sprays of tobacco decoction before the leaves become 

 curled. Where large power sprayers are available, old elms sprayed 

 with drive nozzles could probably be cleaned of most of the infestation. 

 Dormant sprays of lime-sulphur heavily coating the elm bark should 

 be tested as to their efficiency in killing the over-wintering egg. 



