Ninth Report of tee State Entomologist 



365 



T . , Fig. 22. — The grape curculio, Craponius rN.«:QrA 



during tlie lis: a, grape injured by the larva; 6. the larva. 



from several species of insects besides the curculio, and from some of 

 the fungus attacks to which they are liable, it would be well always, 

 to resort to this method of pro- 

 tection wherever the curculio 

 abounds. Where this is not 

 done, perhaps the next best 

 means of relief would be that 

 of jarring the beetles from the 

 vines upon a cloth when they 

 visit the berries 

 month of June for feeding on them and for depositing their eggs. 



The beetle may be recognized by its black color sprinkled Avith 

 grayish spots; its prothorax with four large tubercles of which the 

 outer ones are acute; the alternate interspaces of the wing-covers the 

 more elevated and somewhat uneven; and its rounded form, unlike the 

 oval of most of the curculio tribe. Its length is rather more than one- 

 tenth of an inch. It is represented in Figure 32. 



In August, the larva having attained its growth, drops to the ground 

 and enters it for pupation, where it remains for about a month before 

 changing to the beetle. If during this time the ground beneath the 

 vines could be worked, many of the delicate larvae or pupae would be 

 crushed or injured to a degree sufficient to prevent their maturity. The 

 arsenical spraying so effective against the plum curculio, would not 

 be available, it is thought, for protection against this insect. See 

 Walsh, First Annual Report on the Insects of Illinois, 1878, pp. 13-21, 

 fig. 1. Riley, First Report Insects of Missouri, 1868, pp. 128, 129, 

 figs. 70-72. Saunders, Insects Injurious to Fruit, 1889, pp. 300, 301, 

 figs. 311, 312. Webster, in Insect Life, iii, 1891, pp. 452, 453. 



The Peach-bark Scolytus, PhlcEotribus liminaris {Harris). 



Mr. George C. Snow, of Penn Yan, N. Y., sent on the 7th of May, 

 peach bark infested with the above-named insect, accompanied by the 

 following note: 



I send you by this mail under separate cover a section of peach bark 

 which you will find filled with an insect that is new to me. It may be 

 of interest to you to know that the trees that they are in are literally 

 full of them from collar to branches. 



I find an unusually large number of borers in the trees this spring. I 

 am intending to make a mixture of sludge-oil soap, carbolic acid and 

 lime for a tree- wash, to prevent any eggs from being deposited. Do 

 you know of anything better? 



Answer. — The insects sent in the bark are a destructive bark-borer, 

 one of the Scolytidm, known as Phloeotribus liminaris. Ordinarily it 



