266 



C. ponwndla and Aspidiotiis sp. on apples. From Montana, C. 

 pomonclla in apples, and Hdiothis [Chloridca) obsoleta in green maize. 

 From Oregon, C. pomoneUa in pears and cider apples ; A . perniciosus 

 on pears and apples ; larvae of Aegeria ridilans, Julus sp., Scymnus 

 sp. and a Capsid on strawberry plants ; Hemichionaspis aspidisirae 

 on Aspidistra ; and L. beckii on grapefruit. From Ohio, C. poiiio)iella 

 and A. perniciosus on apples ; Aphis sp., Pantomorus f idler i' and 

 Tetranychus sp. on rose plants ; Pseudococcus sp. on Lantana 

 and geranium ; Coccus hesperidum ; and Saissetia oleae on 

 oleander. From Nevada, C. pomoneUa in apples ; and Heterodera 

 radicicola in potatoes. From New York, C. pomoneUa and A. perni- 

 ciosus on apples ; Lepidopterous larvae in beans ; Silvanus siirina- 

 mensis in dates ; and L. beckii on oranges. From Nicaragua, 

 Bruchus obtectus in beans. From Porto Rico, L. beckii on grapefruit 

 and oranges. From Pennsylvania, C. pomoneUa and A. perniciosus 

 on apples, Aphids on rose bushes and Tetranychus sp. on violet 

 plants. From the Philippines, Sitotroga cerealeUa, Calandra [Sit- 

 ophilus) orvzae, Laemophloeus pusiUus, Cathartus advena, Silvanus 

 surinamensis, Tenebroides mauritanicus, Tribolium castanemn 

 (ferrugineum) and unidentified Coleoptera in maize. From Tahiti. 

 Lepidopterous larvae in castor beans ; Pseudococcus sp. on pine- 

 apples ; Euscepes batatae in sweet potatoes ; Coccids on green 

 coconuts; Lepidosaphes beckii on orange peel; and Hemichionaspis 

 minor on coconuts. From Texas, Cylas formicarlus in sweet 

 potatoes ; and Aleurodes citri on ornamental cuttings and Gardenia. 

 From Utah, C. pomoneUa in apples ; and L. beckii and Parlatoria 

 pergandei on grapefruit. From Washington, A. perniciosus, L. ulmi 

 and eggs of Tetranychus sp. on apples ; C. pomoneUa in apples 

 and pears ; and Dendroctonus sp. in a pine tree. From Scotland, Tetra- 

 morium caespitum, Tribolium castaneum, centipedes and Collembola 

 on ornamental plants. 



Jagger (I. C). A transmissible Mosaic Disease of Lettuce. — //. 

 Agric. Res.. Washington, D.C., xx, no. 10, 15th Februarv 1921, 

 pp. 737-739, 1 plate. 



At Sanford, Florida, a serious infectious disease of lettuce was 

 observed in 1920. It appears to be caused by a parasite that is not 

 capable of isolation through ordinary microbiological or bacteriological 

 technique. Experimental transmission from diseased to healthy 

 plants has been effected by means of Aphids, particularly Myzus 

 persicae, Sulz. From the symptoms and general character of the 

 disease, it should undoubtedly be recognised as a true mosaic disease 

 of lettuce. 



MiuDLETON (W.). Leconte's Sawfly, an Enemy of Yomig Pines.— 

 Jl. Agric. Res.. Washington. D.C., xx, no. 10, 15th Februarv 

 1921, pp. 741-760, 3 figs, 5 plates. 



A detailed description is given of the various stages of Neodiprion 

 lecontei. Fitch, with a summary of its life-history. 



The larva is an important enemy of young pines in the eastern part 

 of the United States, being especially iniurious to nursery stock by 

 defoliating the trees. Even in cases of incomplete defoliations, the 

 tree is often stunted or misshapen. In large natural or artificial areas 

 of forest remedial measures are too expensive, but colonies of the larvae 



