Preventive measures 169 



Proclamation of Gov. Hardin 213 



Promachus apivora 127 



Prospective injury from locusts. .. 230 



Pupa of spretus, description of 20 



Purslane, great abundance follows 

 locust injury Ill 



Q 



Quiscalus versicolor 114 



R 



Rains, advantage of heavy 43 



Rate of flight of locusts 56 



Rate of flight of locusts, variable.. 96 



Rate of spread 95 



Rate of travel of young 100 



Ravages of locusts east of Missis- 

 sippi 187 



Red-eyed Vireo 114 



Red-headed Woodpecker 113 



Red - legged locust common in 



United States 14 



Remedies against locusts 139 



Results arrived at by experiments 



on eggs of locusts 151 



Return migration to British 



America : 47 



Return migration to British 

 America, theory of, strengthened 



by occurrences in 1876 50, 51 



Rocky Mountain Locust purely 



American 28 



Root crops, what ones safe 175 



S 



Salvia trichostemmoides 92 



Sai-copkaga earn aria 123, 135 



" sarracenice 132 



Side ditches and drains as traps for 



locusts 160 



Signal Service, availability of, in 

 communicating information as to 



locust invasions 172 



Silky Mite 115 



Skunk, enemy of spretus 114 



Smudging and smoking 168 



Soldier-bug, feeds on locusts 128 



Species, geographical range of 202 



Species, failure of people to dis- 

 criminate between 20 1 



Species, variation in 25 



Species vs. Variety and Race 23: 



Species, what constitutes a 24 



Specific distinctions arbitrary 25 



Spines on legs of locusts, possible 



use of 76 



Spretus and Atlanis probable races 



of f emur-rubrum 26 



Starvation caused by locust inva- 

 sions— cases of, not well attested. 46- 



Slenopogon consanguineus ... 127 



Striped Squirrel, eats locust-eggs.. 114 



Summer vs. Fall swarms 58 



Sulphur, use of, in protecting trees 167 

 T 



Tachina anonyma 1.31 



" flamcauda 134- 



Temperature at St. Louis in winter 



of 1876-7, table of 152 



Tendency of hatching locusts to 



push upwards 78 



Tettix gro.aulata 230 



Texas, early locust invasion of 34 



Time of appearance of invading 



swarms 94 



Time of hatching of eggs 97 



Tin, use of, in protecting trees 166 



Tragocephala viridifasciata 228 



Tramping ground infested with 



locust-eggs 154 



Transformations of spretus 69 



Trapping young locusts 157 



Trees, what usually avoided by 



spretus 91 



Trombidium scabrum 115 



" sericewn 115 



" holocericeum 115 



Two-striped locust 194 



V 



Vernonia novaiboracensis ... 02 



Vilfa vaginaiflora Ill 



W 



Water, efficacy of, in ditches for 



trapping locusts « 160 



White-lined Morning Sphinx 112 



Wind, its influence in determining 

 course of locust swarms.. 57, 104, 217 

 Y 



Yellow-tailed Tachina-fly 134 



Yellow-billed Cuckoo 114 



Young locusts, how destroyed 155- 



