LIST OF PLATES xv 



PI. XXXVII. Attacks of CryptorJiyiulnis braitdisi, Sleb., in Piiiiis 



lo/igi/olia To face page i\,io 



PI. XXXVIII. Cyrtotrachclits longipes, Fabr., egg, larva, beetle, young 



J/<7<;(V?//;/rt: /^^zw/^z/.v/tf/V/^-.v shoot, and pupal coverings... ,, ,, 440 



PI. .\XXIX. 7'<v;//(7/.v /■//'/'('///-'v//, Steb., in spruce bari< „ „ 462 



PI. XL. Egg-galleries of 7V'w/V//'.v -'77'/5<7z//v^// in sapwood of spruce „ „ 466 



PI. XLl. Bark of Piiius grrardiana showing the "weeping" pro- 

 duced by resin oozing from the entrance-holes of 

 Polygraph ns t row hi, Steb ,, „ 47° 



PI. XLII. Galleries of Sphaerotrypes globulus, I>]andford, in Tcrmi- 



ualia to)nc)itosa ... ... ... ... ... ... ., ,, 47^ 



PI. XLl 1 1. Entrance and exit holes of Sphacrot)y pes globulus, Hland- 



ford, in sal bark ... ... ... ... ... ... „ „ 487 



PI. XLIV. (Galleries of .S'/>/i</r;7;/;7/fj- ^Z^?/;// ///J-, Blandford, in sal ... „ ,, 488 



PI. XL\'. 1-3. Sphaerotrypes querci, Steb., larva, beetle, and larval 

 galleries. 4. Chratnesus globulus, Steb. 5. Diapus 

 itnpressus, lanson. 6. Crossolarsus fairmairei, 

 Chap.,var „ „ 494 



PI. XLVl. I. Polygraphus major, Steb. 2. Polygraplius pint, Steb. 



3. Tomicus ribbentropi, Steb., larva, pupa, beetle ... „ „ 501 



PI. XL\'II. A;/j'^^;-rt;^//;/j- w^yV;;-, Steb., in deodar bark „ „ 504 



PI. xXLVIlI. I. Polygraphus frenchi, Steb., larva, pupa, beetle. 2. 

 Phloeosinus zhobi, Steb., egg and beetle. 3. Pityo- 

 iftv/^.f c7;////(:?rrt:^, Steb., female and male beetles ... „ „ 511 



PI. XLIX. Galleries of Polygraphus treuclii, Steb.. in the bark of 



Pinus gerardiana ... ... ... ... ... ,, ,, 5^^ 



PI. L. Galleries of Polygraphus piiii, Steb.. in the bark of blue 



pine „ „ 524 



PL LI. Polygraphus lougifolia, Steb., larva, pup-i, beetle, and 

 entrance-holes and larval galleries in bark of Pinus 

 lougifolia ... ... ... ... ... ,, „ 526 



Galleries of Dryocoetes lieiuetti, Steb., in (h/ereus incana „ ,, 546 



Galleries of Tomicus ribbejitropi, Steb., in spruce bark 



(coloured) ... ... ... ... ... ••• ••• ,, „ 552 



Egg and larval galleries of Tomicus ribbentropi, Steb., in 



blue pine bark ... ... ... ... „ ,, 554 



Tomicus lougifolia, Steb., larva, pupa, beetle, entrance- 

 holes in bark, and a pairing-chamber in the sapwood 

 q{ Pinus hmgifolia „ ,. 557 



PL LVI. Galleries of Tomicus lougifolia, Steb., in the sapwood of 



Pinus lougifolia ... ... ,» » 55^ 



PL L\'1I. I. Scoly/us major, Steb., larva, pupa, and beetle. 2. 



Scolylus minor, Sieb., larva, pupa, and beetle ... „ „ 568 



