494 



Patch (E. M.). Eastern Apbids, new or little known. Part I. — Jl. 

 Ecoti. Entom., Concord, N.H., x, no. 4, August 1917, pp. 417- 

 420, 1 fig. 



The species described in this paper from the Eastern United States 

 inckide: Ajyhis viburniphila, sp. n., found on many species of Vibur- 

 nmn ; this species is largely parasitised by Hymenoptera ; A. rumexi- 

 colens, sp. n., found on Rmnex acetosella ; A. saliceti, Kalt., found on 

 various Umbelliferae as well as on willow, which was the only previously- 

 known host ; A. davisi, n. n., is proposed for the species recorded by 

 Davis as^. popiilifoliae, Fitch {Journal of Economic EjitomoJogy , Vol. 3, 

 p. 489), as according to Baker, Fitch's insect is a species of Pierocomma ; 

 Procvphilus xylostei, De G., on Lonicera ; and Lachnus rosae, Choi., on 

 wild rose ; this species has not previously been recorded from America. 



Baker (A. C ). Eastern Aphids, new or little known. Part II. — 

 Jl. Econ. Entom., Concord, N.H., x, no. 4, August 1917, pp. 420- 

 433, 1 fig. 



This paper includes the following species : MyzocaJlis punctateUus, 

 Fitch, on oak ; this species has been erroneously treated as a synonym 

 of M. caryella, Oest. ; M. alnifoliae, Fitch, on alder, frequently 

 incorrectly recorded as the European M. alni, F. ; 31. californi- 

 cus, sp. n., on Quercns lohata ; M. famipennellus, Fitch {caryaefoliae, 

 Davis), an apparently rare species for which no host is given ; 

 31. tiliae, L., on Tilia ; 31onellia costalis, Fitch, on hickory leaves; 

 Eucerapihis hetidae, Koch {cerasicolens, Fitch), on Japanese maple ; 

 E. mucidus, Fitch (pinicolens, Fitch), on black birch; E. brevis, sp. n., 

 on white birch; E. lineata, sp. n., and E. deducta, sp. n., on birch; 

 Ccdlipternella annidata, Koch, on various species of birch ; Chaifc- 

 phorus lyropiicta, Kess, on Norway maple, frec[uently recorded 

 as C. aceris, L. ; C. americanus, sp. n., on maples ; C. vimincdis, 

 Mon., on Pojndiis grmididentata ; C. nigrae, Oest. {cordata, Wms.), 

 on M-illow ; C. bruneri, Wms. , on poplar ; and Pierocomma media, sp. n. , 

 on poplar. 



Keys are given to the American species of the various genera. 



EssiG (E. 0.). The Tomato and Laurel Psyllids.— J/. Econ. Entom., 

 Concord, N.H., x, no. 4, August 1917, pp. 433-444, 1 plate, 2 figs. 



Some fifty species of Psyllids occur in California, only two, the tomato 

 Psyllid, Paratrioza cockerelli, Sulc, and the laurel Psyllid, Trioza 

 alacris, Flor, being considered of economic importance. The former 

 is widely distributed in the State, mainly infesting Solanaceous food- 

 plants, but also attacking others. Hibernation takes place in the 

 adult stage on evergreen plants. Oviposition occurs from April until 

 late in the year, so that all stages are found from May to November. 

 When infestation becomes serious, which is seldom the case, care must 

 be taken to use a spray that will not injure the delicate food-plants. 

 Nicotine sulphate or Blackleaf 40 may safely be used at the rate of 

 1 : 1,000 or 1,500. In Colorado, lime-sulphur proved the only successful 

 control on tomatoes ; used in the proportion 1 : 40 the Psyllids were 

 killed without injury to the plants, though potatoes were seriously 

 damaged by this spray. 



