214 ORTHOPTERA OF NOVA SCOTIA. — PIERS. 



flock of poultry, particularly turkeys, the latter of which 

 destroy vast numbers of locusts or grasshoppers, and such 

 fowls command a ready sale. Methods of dealing with 

 Cockroaches in houses and other buildings are described 

 in the following pages where those species are described. 

 A circular (No. 5) on the control of locusts in eastern Canada, 

 by Arthur Gibson, was issued ia 1915 by the Entomological 

 Branch of the Canadian Department of Agriculture, Ottawa, 

 and may be obtained on application to that departmen':; 

 and many thorough state reports on the subject of orthopteran 

 =C3atrol are published by the agricultural experiment stations 

 of the United States. 



Preszrviri] Orthoptera for s-Aentific purposes. — Specimens 

 may be taken with an eatomo'ogical hand-net, or in the 

 manner known as sweeping; but it very frequently happens 

 that they have to be stalked and captured by hand. The 

 notes of many species draw attention to their whereabouts, 

 and then by obtaining two cross-bearings the exact location 

 of the individual can be ascertained, upon which it can be 

 cautiously approached and taken. Further reference to 

 this method will be found in the remarks on Scudderia pis- 

 iillata, which is difficult to get in any other way. Specimens 

 can be killed in a corked bottle of alcohol or in an entomo- 

 logical cj^anide killing-bottle. The former is the safest 

 for beginners to handle. On rexching home the insects 

 should be either preserved in labelled vials in dilute alcohol 

 or formaldehyde, the first of which, while it keeps the parts 

 somewhat flexible for examination and prevents attacks 

 by insect pest.s, will ultimately destroy some of the colours;'" 

 or else pinned with insect pins such as are used for entomo- 

 logical purposes, and afterwards syistematically arranged 



^Libels written ivith Hij^ssins' waterproof drawing in.i, blaci, may be pl.iced into alcohol 

 immediately after beinjj written, and will not run or fade and ine .ery mucii more le.jiblu than 

 pencil-written labels. This I discovered many years ago and liave used it in museum work 

 ever since. So far I have not iie.xrd of otliers usinj t..is watorpr lol \nk to suople.nent the 

 lead-pencil for writin<r such labels, and the matter is one waic i sli ould bo of iniercst to iill 

 who have to deal with specimens preserved in jars where it is ne -essttry to have a label within 

 he jar in case the gummed label on the outside becomes detatc.ied. 



