104 SOME INSECTS INJURIOUS TO FORESTS. 



Page. 



Bird enemies of Dendroctonus brevicomis 27 



Birds beneficial in control of forest insects 86-87 



Black Hills beetle (see also Dendroctonus ponderosse). 



losses therefrom 67 



"Black holes " in timber caused by Corihylus columbianus 61 



"Black tops." definition 19 



Borers, flat-headed, injuries to crude forest products 65 



prevention 80 



roundheaded, injuries to crude forest products 64-65 



prevention 80 



wood of dying and dead hardwood trees 64 



Bracon (Melanobracon) webbi n. sp., parasite of Monohammus titillator, descrip- 

 tion 53-54 



Bridge timbers, injuries by insects 67 



powder-post insects, prevention 83-84 



"Broken tops," definition 19 



Buprestis apricans, injuries to wood of living pines 62 



Burning infested bark of standing and felled trees to control barkbeetles 74 



slabs to control barkbeetles 74 



timber and waste material to control insects which cause 



defects in living wood 78 



worthless wood to destroy locust borer 11-12, 37 



Cannibalism in Cyllene robinise 35 



"Capricorne chatouilleux." (See Monohammus titillator.) 



Carbolic emulsion against locust borer 6, 38 



Carbon bisulphid against insects injurious to log cabins and rustic work 84 



termites 84 



Carpenter worms. (See Prionoxystus.) 



Carriage stock, finished seasoned, injuries by powder-post beetles 66 



prevention. . 82 



Cerambyx carolinensis, bibliographic reference 56 



= Monohammus titillator 42 



titillator, bibliographic reference 56 



= Monohammus titillator 42 



Chestnut, injuries to wood of dying and dead trees by insects 64 



living trees by Lym^xylon sericeum 60-61 



timber worm. (See Lymexylon sericeum.) 

 Click beetle. (See Elaterid.) 



Climatic conditions, beneficial, in control of forest insects 87 



Clytus (Cyllene) robinise, bibliographic reference 15-16 



Coal tar against powder-post insects 83 



Coniferous trees, injuries by insects to the wood of those dying and dead 63-64 



Cordwood, injuries by insects 65 



prevention 81 



Corrosive sublimate against termites 84 



Corthylus columbianus, injuries to wood of living beech 61 



elm 61 



oak, rock and white 61 



poplar, yellow, or whitewood. 61 



Cossus (Prionoxystus) roftmiffi,, bibliographic reference 15 



Creosote against powder-post insects 83 



termites 84 



