b CONTEXTS. 
The (listrihution of the periodical Cicada — Continued. Page 
Thi'tanji^f of the \s'ell-established broods, taken in numerical order — Cont'd. 
Broods of the 13-year race — Continued. 
Brood XXlII—Tredecim—ldU 71 
Brood XXIY—Tredecim— 1912 7:) 
Brood XXY— Trededm— 1913 74 
Brood XXVI— Tredeam— 1914 74 
Brood XXVIl—Tredecim— 191b 75 
Brood XXVUI—Tredecim—1916 75 
Brood XXIX— Tredecim— 1917 75 
Brood XXX— Tredecim— 191S 7(; 
Systematic position and structural details 77 
The mouth parts, or beak 79 
The ovipositor 81 
The musical apparatus 82 
The song notes of the periodical Cicada 84 
The so-called sting of the Cicada 86 
Transformation to the adult stage 88 
Period of emergence 88 
Duration of the adult stage 90 
Method of emergence 91 
Cicada huts, or cones 91 
The act of transformation 98 
The adult insect and its habits _. 99 
Numbers and local distribution 99 
The food habits of the adult insect ] 01 
The Cicada as an article of food 102 
Oviposition and its effect on the plant 104 
Plants selected 105 
Result to the plant of oviposition 1 06 
Method of inserting the eggs 109 
The gi-owth and hatching of the eggs MO 
The underground life of the Cicada 112 
Experimental proofs of the long underground Yiic 112 
A successful 17-year breeding record 1 114 
History of the larval and pupal stages 116 
Technical description of the different stages 118 
First larval stage 1 1<S 
Second larval stage 110 
Third larval stage 119 
Fourth larval stage 1 20 
First pupal stage 121 
Second pupal stage 121 
The habits of the larva and pupa 122 
The food of the larva and pupa 1 22 
The location in the soil 12-1 
The method of burrowing 1 25 
Damage occasioned by larva? and pupa? 126 
The natural enemies of the Cicada - 1 27 
Insect parasites 129 
Dipterous enemies 129 
Hemipterous enemies 130 
