4 
The wheat bulb-worm (Meromyza americana Fitch) .....-.-.---------------- 
Distribution’ 2 <.. oosc8 site See eee See Pees ee ee 
Remedies; -(... . 2.252. des - See ioe sae enc Soriahhe ne ene ee eee 
The army worms ( Leucania unipuncta Haw. and Laphygma frugiperda 8. & A.) - 
The army worm (Levcania wnipuncta Haw.): -22.- .2qecenaces- eee eeeoee 
Deseription: 5. Soscis SoeGud os tobe see e cece ee ee ee eee 
The larvyies o..3 oss ncecls seas sk ewes Sesto Sein ae De eka eee 
Number of generations. - ~~ -- RSE eG see pee ont hed eee dees Sel se 
Preventives:and remedies... 252% 5 Mo 2 2 Se oe oe eee 
Spraying 2.2.20. atssseece sede SS ee oe ee ee eee 
Distribution of poison across their line of march........---.-------- 
Natural enemies” <2 22 32205225322 see atec asus eee pene ee 
The grass worm, or fall army worm (Laphygma frugiperda 8. & A.)...--- 
Remediesand precautions =... 22.222. 222 2 ot see ae ee 
The wheat sawflies..-22 3.2. ses 55052 ck ee ee eee Note 
The 'stem-boring sawiies: 27.22). geese ee onscee cee ae Oe a eee 
How they pass the:wimter.....22 22.25) See ee oe ee 35 
Breéeda:in «wheat. oc cc sincck cee eee Ce Cee oe Oe Ane gan 36 : 
Western wheat sawfly (Cephus occidentalis Marlatt)........--.----------- 36 
Leaf-feedine pawilies 0.22.28. dete pe eet eee eae oe eens 36 
Grass sawfly (Pachynematus extensicornis Nort.) .....--.-..-------------- 37 . 
Damage inconsiderable |... - 003-2. s-seSecce sae aee pe a eee 38 
Special precautions not necessary </<. 255200 Ji< ews ese el wer aoe 38 | 

LEEUS ECA PON: 
Fic. 1. The chinch bug: common form of long-winged adult..........----- 7 
2. Map showing distribution of chinch bug in the United States. ..-..--- 8 
3.. The chinch bug: adults of short-winged form . .- 1... 2-5. .-s- 2-50 9 
4. The chinch bug: eggs, nymphs, and adults -..-...-.....-...-.--.-- 10 
5. The Hessian fly: male and detaila. 2.25.22. 22. saeco eee 14 
6. The Hessian fly: female, eggs, larva, flaxseed pupa, and infested 
wheat stem s< A: 2 55293. he ee ete Oe ee ee ee 15 
7. Hessian fly: wheat plant illustrating injury with views of different 
forms of the insect in different stages and of a parasite........---- 16 
8. Map showing distribution of Hessian fly in America. .......--.----- 18 
9, Egg and larvaiol Hessian fly ..2 2... seince 3-5 ne soa = so eee 19 
10, Wheat midge \( Diplosis tritici)... Bee a eee ce eee ee ee ee 22 
11. Wheat plant-louse (Nectarophora cerealis)..---.------ Lae eee 25 
12. “Wheat joint- worm (Jsosoma triG)' 22S eS oe ee 26 
3. Wheat stems showing injury by joint-worm.-..-....--..------------ 26 
14; Wheat straw-worm (Jsosome grande): -)--~- =. oe ee 27 
15. Wheat straw-worm (Isosoma grande) -...-.--.-----------------+--- 28 
16. Wheat straw-worm (Jsosoma grande, form minutum), with adults .... 28 
17. Wheat bulb-worm (Meromyza americana) ....-----------------+---- 29 
18. The army worm (Leucania unipuncia) larva. -.-.-...----.------------ 31 
19. The army worm, moth, pupa; and eggs. 2... 62.5. + ace se< sae eee 31 
20. Parasite. of the army worl. -hossan cacecn- caee eine 2 > eee 33 
21. The fall army worm (Laphygma frugiperda) ..-.-.----------------- 34 
22. European wheat sawfly (Cephus pygmxus) -.-....------------------ 35 
23. The western wheat sawfly (Cephus occidentalis) ....-...------------- 36 
24, Leaf-feeding sawfly (Dolerus arvensis)... ..<-s- oo eae e-e eo a= === aS See 37 
25. Grass'sawily (Pachynematus extensicornts) ..2.225- ese ese. 4 see eee 7 
132 
