514 



FAMILY VII. TETTIGOXIIDJE. THE KATYDIDS. 



much longer than its basal width, its tip (except in melano- 

 rhinus) narrowly rounded (Fig. 169, a e.) 

 c. Lower surface of fastigium in part or wholly black. 



d. Both lower margins of hind femora armed with spines; un- 

 der surface of fastigium almost wholly shining black 

 (Fig. 169, a d.) 



e. Larger and more robust, length of body, female, 38 or more 



mm. ; of fastigium of female in front of eyes, 5.3 or more 



mm. 234. EXILISCANORUS. 



ee. Smaller and more slender; length of body, female, less 



than 36 mm.; of fastigium rarely more than 4.5 mm. 



Fig. 169. Ventral views of fastigium of males of Neoconocephalus. X 6. a > exilis- 

 canorus; b, nebrascensis; c, lyristes; d, melanorhinus; e, ensiger ; i, robnstns; g. crepitans', 

 h, caudellianus; i, palustris; j, velo.r; k, retusus; 1, triops. (After R. & H.) 



/. Ovipositor distinctly longer than hind femora; tip of 



fastigium narrowly rounded (Fig. 169, b, c.) 

 g. Ovipositor surpassing tips of tegmina 5 7 mm.; form 

 of male slightly more robust; fastigium usually 

 slightly depressed above. 235. NEBRASCENSIS. 



gg. Ovipositor not surpassing tips of tegmina; form of 

 male more slender; fastigium subcylindrical, usually 

 slightly longer, more attenuate. 235a. LYRISTES. 

 ff. Ovipositor shorter than hind femora; fastigium about 

 twice as long as its basal width, its tip subtruncate 

 (Fig. 169, d.) 236. MELANORIIINUS. 



del. Under surface of fastigium with only the sides and tip black 

 (Fig. 169, e}; usually the inner lower carina of hind fe- 

 mora alone armed with spines; ovipositor longer than hind 

 femora. 237. ENSIGER. 



cc. Lower surface of fastigium without black markings; form ro- 

 bust; both lower margins of hind femora usually spinose; 

 ovipositor about as long as hind femora. 238. ROBUSTUS. 

 &&. Fastigium narrowing but little if at all from near base to apex, 



its tip rounded or subtruncate (Fig. 169, g ?.) 

 h. Ovipositor but little if any shorter than hind femora; form 



robust. 



i. Lower surface of fastigium immaculate. 238a. CREPITANS. 

 ii. Lower surface of fastigium with black margins (Fig. 169, h.) 



239. CAUDELLIANUS. 



Jih. Ovipositor distinctly shorter than hind femora; form more 

 slender; under surface of fastigium immaculate (Fig. 

 169, i, j.) 



