REPORT OF THE STATE ENTOMOLOGIST 1914 65 



caused by a weak pollination rather than as a result of insect injury. 

 There is, nevertheless, a probability of some injury resulting from 

 the presence of these insects. The biological data given above are 

 of value in indicating what may be possible with allied species on 

 other fruits, even if this form is not a serious enemy of the grape, 

 and the facts are therefore placed on record. 



Spotted winged Idiocerus (Idrocerus maculipennis 

 Fitch). The recently hatched nymphs are small, shining, brownish 

 black and only about one twenty-fifth of an inch long. They 

 were active and abundant on apple trees at Arlington May 14th, 

 though they did not seem to be causing any particular injury. About 

 ten days later the nymphs were still abundant in the field, though 

 in the second stage. At this time the orchard was being sprayed 

 for the control of the red bug and it was noted that these nymphs 

 appeared to be much less susceptible to the insecticide. By June 

 25th the nymphs had attained the adult condition, and by July 8th 

 they were rather common in the orchard and numerous nymphal 

 skins were seen here and there on the leaves. There was no injury 

 which could be definitely associated with the species. Both nymphs 

 and adults are active and not readily captured. 



Messrs Osborn and Ball 1 state that this species occurs very 

 commonly on hawthorn and crabapple trees, the larvae appearing 

 in May. The earlier ones mature by the middle of June and later 

 individuals early in July. The adults were reported by them as 

 common the latter half of June and nearly through July, and as 

 again common the last of August and early in September. This 

 latter would suggest the possibility of a second brood. These 

 authors have figured both the adult and nymph of this species. 



San Jos< scale. The appearance during the summer and fall of 

 1 9 13 of hosts of small, four- winged parasites aroused a lively interest 

 among fruit growers and led many to hope that at last we had a 

 thoroughly effective natural check for the San Jose scale. Investi- 

 gations and observations of last year showed these beneficial species, 

 notably Prospaltella perniciosi Tower and Aphe- 

 linus fuscipcnnis How., to be widely and generally dis- 

 tributed and the more important species in this beneficial work, 

 though Coccophagus immaculatus How. and several 

 associated forms were obtained in smaller numbers. 



Observations upon the San Jose scale and its parasites have been 

 continued during the past season and early in July a circular letter 



Davenport Academy Natural Sciences Proceedings, 8: 73, pi. 3, fig. 4, 1898. 



