398 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



Riley's account testifies. That they migrate to water shoots of apple; 

 to mountain ash (Pyrus species) and to hawthorns {Cratcegus species), 

 there producing progeny known as the woolly aphid of the apple, I 

 have had definite and repeated proof. 



The woolly colonies (mostly hidden under rough bark) are this 

 season more abundant upon the elm than upon the apple in this vicin- 

 ity, comparatively few of the apples being colonized, the mountain 

 ash being here conspicuously a favorite summer host for Schizoneura 

 lanigera (americana) . 



A bulletin of the Maine Agricultural Experiment Station (No. 203) 

 now in press treats of certain phases of this problem not touched upon 

 in the present paper. 



An especial study of the antennal variation of this species is under 

 way, it being purposed to tabulate at least 1000 antennae, with camera 

 lucida sketches of the more significant variations. The two extremes 

 of the variable series show a difference wide enough to ''separate 

 lanigera from americana on good antennal characters." However, a 

 large series renders a separation on this basis impossible. Although 

 the discussion of this important point is postponed until the requisite 

 data are tabulated, it may be of interest in this connection to state 

 that a single collection of elm leaf migrants made at Orono show a 

 range of from 19 to 32 annular sensoria on antennal joint III, 4 to 9 

 on IV, 2 to 10 on V, to 2 on VI. 



White Grubs {Lachnosterna species). These common pests were excessively 

 abundant the past summer, at least in Albany, Ck)lumbia and Rensselaer counties, 

 N. Y., they being so very numerous in many fields as to destroy practically all 

 the grass roots so that large patches were badly pulled by the horse rake. Straw- 

 berry beds and corn were also seriously affected, especially when planted on sod. 

 The greatest damage was confined to old seedings or meadows and usually to moister 

 portions of the fields. These grubs were probably a little over a year old and may 

 be those of Lachnosterna fusca Froh., since this was one of the species abundant 

 in May and June 1911. In addition to these two, L. grandis Sm., L. hirlicula Knoch 

 and L. hirsuta Knoch were observed in abundance last year. Several species of 

 June beetles were numerous last spring so that a continuance of the above noted 

 depredations, probably on a more limited scale, may be expected in 1913. 



E. P. Felt. 



