258 The University Science Bulletin. 



Chlorotettix spatidatits Osborn and Ball. 



(PI. XXIV, fig. 7; pi. XXXII, fig. 6.) 



Length, 1.5 mm.; greatest width, 0.24 mm. Apical portion much wider than 

 basal portion, tapers caudad at apex; preapical prominence wanting; sHghtly 

 curved, tip rather abruptly narrowed, extreme apex narrowly rounded, chitin- 

 ization medium; strengthening rod extends caudad as far as last primary 

 tooth. Toothed area on dorsal edge occupies the apical two-thirds; teeth 

 twenty-seven to twenty-eight in number, of medium size, rather iiTegular as 

 to shape, some rounded, some triangular and some flat across the top; bear 

 two to seven secondary teeth on the caudal edge and may or may not bear 

 one to three secondary teeth on the cephalic edge; tip notched with small 

 teeth on both edges, not continuous around the tip, nine to ten on ventral 

 edge ; area of ducts conspicuous, granular in appearance though many elongate 

 ducts are visible, duct openings visible; open along ventral apical edge (eight), 

 at extreme apex (one), along dorsal edge of toothed area, and in basal area; 

 the two valves of the pair are joined one to the other by an elongate, rectangu- 

 lar, chitinized connection present on the dorsal edge of the basal area, only 

 slightly more heavily chitinized than the rest of the valve, occupying about 

 one-sixth of entire length. 



Chlorotettix galbanatus Van Duzee. 



(PI. XXIV, fig. 8; PI. XXXII, fig. 7. J 



Length, 1.4 mm.; greatest width, 0.21 mm. About the same width for en- 

 tire length, apical portion very slightly narrower than basal portion, tapers 

 caudad to apex; no preapical prominence; slightly cun^ed, tip gradually nar- 

 rowed, extreme apex bluntly rounded, chitinization medium; strengthening rod 

 extends caudad as far as third dorsal tooth from tip. Toothed area on dorsal 

 edge occupies somewhat less than the apical two-thirds; teeth twenty-eight in 

 number, of medium size, some rounded, others of a general triangular shape, 

 evenly spaced; bear secondary teeth, two to eight on caudal edge and an oc- 

 casional single secondary tooth on the cephalic edge; tip notched with small 

 teeth on both edges, not continuous around the tip, ten present on ventral 

 edge; area of ducts conspicuous, granular in appearance, circular duct open- 

 ings visible; open along ventral apical edge (thirteen), at extreme apex (one), 

 along dorsal edge of toothed area, and in the basal region, where elongate 

 ducts are visible; the two valves of the pair are joined one to the other by a 

 distinct, curved, heavily chitinized connection present on the dorsal edge of 

 the basal area, occupying a little less than a fourth of the entire length. 



Jassus olitorius Say. 



(PI. XXXIII, fig. 2.) 



Length, 3.7 mm.; greatest width, 0.2 mm. Very long, narrow and rodlike, 

 apical portion which bears teeth only slightly if any wider than basal rod,, 

 tapers only at apex; no distinct preapical prominence present; distinctly 

 curved, tip narrowed, rounded at extreme apex, chitinization moderately 

 heavy ; strengthening rod extends caudad as far as sixth dorsal tooth. Toothed 

 area on dorsal edge occupies about the apical fourth; eleven teeth present on 

 each valve with a large median tooth present between teeth one and two; 



