76 



twigs were quite covered with a thin coating of the fungicide, this 

 may have in some measure acted as a deterrent to the locusts. 1 would 

 not like to make the assertion that Bordeaux mixture will deter this 

 insect from oviposition, but the fact observed warrants one in suggest- 

 ing that it will be an interesting experiment to make when opportunity 

 again presents itself. Other orchards near us were very badly 

 punctured by the female insects. 



It occurred to me that it would be an interesting matter to collect 

 data on the various plants chosen by the female insects for deposition 

 of their eggs, consequently I had one of my students follow this 

 matter up quite closely, and he collected the following list of plants, 

 all of which showed the characteristic oviposition of this cicada: 



List of Plants Punctured by the Cicada (Cicada septendecim). 



1. CoNiFER.E — Pine Family. — Red Cedar {Janiperus virg'miana). 



2. Cornace.e — Dogwood Family. — Dogwood {Cornus Florida) . 



3. CUPULIFERJ5 — Oak Family. — Alder {Alnus viridiii)-^ Beech (Fagiis ferrugin.rm); 



Birch {Betnla spp. ) ; Chestnut ( CasUmca amcncami ) ; Red Oak ( Qncrnis nifirum ) ; 

 White Oak {Q. alba). 



4. Ebenace.e — Ebony Family. — Persimmon {Diof<pyriis rirgiuiana). 



5. Ericaceae— Heath Family. — Blueberry {Vacci.niu)ii spp.); Huckleberry {Gag- 



lussacia spp.); Laurel {Rhododendron maximum). 



6. Hamamelidi.e— Witchhazel Family.— Gum {Lupiuhaiilxir dyraciftua) . 



7. Juglandace.f,— Walnut Family.— Black Walnut (.JnglamnUjra) ; Hickory {Carga 



alba). 



8. Leguminos.e — Pulse Family.— Locust {Robinia p.^eudacacia) . 



9. Ole.\ce^ — Olive Family. — Ash {Fraxinus americana); Lilac {Syringa ridgnri.^). 



10. Platanace^.— Plane Tree Family. — Sycamore [Plat anus occidentalis). 



11. RosACE.E— Rose Family.— Apple {Pgrus mains); Blackberry {Rubus occidentalis); 



Hawthorn {Crahvgus spp.); Peach {Prurms jwr-vca); Plum [Pninus spp.); 

 Quince {Pgrus cgdonla); Raspberry, red {Rnbnx .slrigoxn.^); Raspberry, black 

 {R. occidentalis); Wild Cherry {Prunns fero(iva). 



12. SALiCACE.E--Willow Family.— Poplar {Po/>?(//(.s spp. ); Willow {Salix spi^.) . 



13. Sapindac^— Soapberry Family.— Maple (.hrr ndiriun); Sycamore maple {Acer 



j)seudo-platanHs) . 



14. TiLiACE^— Linden Family.— Basswood (Tilla amcncana); European IJnden 



{T. cnropxa). 



This list shows that 14 botanical f ami lies, comprising 30 genera and 

 33 species of plants, were used ])y tii<^ female cicadas as a nidus for 

 their eggs at our place. 



In the discussion of this paper Mr. Schwarz stated that he consid- 

 ered the seventeen-year locust to be one of the most interesting insects 

 we had in this country, and desired that the economic entomologists 

 should bear this in mind in their reconmiendations for the destruction 

 of the insect. He did not consider the injury done by this species of 

 any particular significance. He thought it to be the duty of economic 

 entomologists to carefully map out the extent and number of broods 



