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Walsh, B. D. — In the Practical Entomologist, vols. I and II, 1867. 

 Various Authors. — Insect Life, vol. II, 1889. Canadian Entomologist, 

 XXIV, 1892. 



The following artificial key will enable the student to more readily dis- 

 tinguish the different genera of GrylUd.r found in Indiana. 

 a. Fore tibiae broad, fitted for digging. 

 b. Length of body more than one-half of an inch. . . II. Gryllotalpa. 

 i';^. Length of body less than one-half of an inch. ... I. Tridactylus. 

 aa. Fore tibife slender. 



c. Hind femora slender IX. /Ecanthus. 



cc. Hind femora robust. 

 (1. Last segment of the maxillary palpus very nearly 

 of the same length as the one preceding. 

 e. Head as broad as or broader than the posterior 

 margin of the pronotum; color black or dark 



brown III. Gryllus. 



ee. Head narrower than the posterior margin of the 

 pronotum; color light brown or dark yellow. . . 



VII. Orocharis. 



dd. Last segment of the maxillary palpus, very nearly, 



or fully, double the length of the one preceding. 



f. Last segment of the maxillary palpus broadly 



flattened VI. Phylloscirtus. 



//. Last segment of the maxillary palpus club- 

 shaped but not flattened. 

 g. Ovipositor much compressed, curved strongly 



upwards V. Anaxiphus 



gg. Ovipositor of the normal form (cylindrical) 

 curved but slightly upwards. 

 h. Head as broad as, or broader, than the pos- 

 terior margin of pronotum IV. Xemobius. 



Jih. Head narrower than the posterior margin 



of pronotum VIII. Apithe.s. 



Family. Gryllid.k. — The Crickets. 



I. Tridactylu.s, Olivier (1789.) 

 To this genus belong some of the smallest of the Gryllidw, no one of the 

 three species found in the United States being more than 10 mm., or two- 



