Rkadu): Ovipositors ok C'kadkllid.io. 'ilil 



lifjhf ; .^trrnst honing rod extends caiidad aliiiosl to ajirx. The toothed area on 

 the dorsal edge oecuijie-s only the narrowed portion of the ai)ex; these teeth 

 are very small, regular, nuintM'ous; the ventral edge bears no teeth at the apex, 

 but somewhat hack from the apex on the widened portion the \entral edge is 

 notehcd with many fine, indistinct teeth; area of ducts conspicuous, granular 

 in ajiiiearance. duct openings \ isihie ; open along ventral apical edge, at ex- 

 treme ajicx, along dorsal ajiical edge, and in basal region; there is no evidence 

 of a chitinous connection between the two valves of the i)air. 



This ovipositor is similar in appearance to the ovipositors of the genus 

 Bnlrlnlha examined. 



Tribe Typhlocybini ( Kirschbaum I . 

 Dikraneura abnorniis (Walsh). 



(PI. XXIV, fig. IS: pi. XXXIII, i\g. 7.) 



Length. 0.7 nun.; greatest width, 0.08 mm. Basal half narrow and rodlike, 

 apical half wider, flat, toothed, tapers caudad to apex; basal portion greatly 

 cm'ved. ajucal portion only slightly ciu'ved; tip greatly narrowed, extreme apex 

 narrowly rounded, chitinization moderately light; strengthening rod extends 

 caudad as far as sixth dorsal tooth from apex. Toothed area on dorsal edge 

 occupies the apical half; the two valves of the pair are not identical as to 

 teeth, the one having few and the other many; the one having more bears 

 twenty-five primar.v teeth, the.se rather small, in the general shape of an obtuse 

 triangle, fairly regular as to size and shape, much reduced in size apically; 

 bear secondary teeth along the caudal edges, three to six in number; the tip is 

 notched with small teeth on both edges, not continuous around the tip. four on 

 the ventral edge; area of ducts inconspicuous, ducts visible, elongate, rather 

 few in number; \isible openings present only along dorsal edge of toothed area 

 and in basiil area; no distinct chitinous connection between the two valves 

 ])resent. 



(tonus Empoasc.\ Walsh. 



The ovipositors of fiv? species of this genus have been examined 

 and found to be very similar. In this genus the two valves of the 

 pair are not identical, but differ in length, width, and size and num- 

 ber of teeth. The shorter, narrower valve bears many very small, 

 regular teeth along its dorsal edge. The longer, broader valve bears 

 comparatively few large teeth, which in turn bear small- secondary 

 teeth. Neither valve in any of the species examined bears teeth for 

 more than the apical fifth of its length. Except in one species the 

 tip of the valve is notched with small teeth. The area of ducts may 

 or may not be conspicuous; ducts elongate, few in number. 



Empoasca trifasciata Ctillette. 



(PI. XXXIII, fig. HI.) 



Length. 0.8 mm.; greatest width. 0.08 nun. Narrow and rodlike, apical 

 toothed i)ortion onlj- slightly wider than basal shaft; di.stinctly curved, tip nar- 

 rowed, extreme apex narrowly rounded, chitinization moderately light; 

 strengthening rod extends caudad as far as second dorsal tooth. Toothed area 



