Readio: Ovipositors of Cicadellid.e. 245 



caudal edge; tip iiotrliod with tiiuall teeth ou both dorsal and ventral edges, 

 practically continuous around the tip, eighteen present on the ventral edge; 

 area of ducts conspicuous, granular in appearance, circular duct openings vis- 

 ible: open along ventral apical edge, along dorsal edge of toothed area, and 

 irregularly in the basal area of the valve; the two valves of the pair are joined 

 one to the other by a distinct, rectangular, heavily chitinized connection pres- 

 ent on the doi-sal edge at about one-third the length. 



Genus Deltocephalus Burmeister. 

 The u\ipositors of seven species of this genus have been examined 

 and found to be similar. The ovipositor is slightly curved, gradually 

 narrowed toward the apex, with apical half little if any wider than 

 the basal half. The apical half bears teeth along its dorsal edge, 

 usually small, rounded, and bearing a few secondary teeth. The 

 apex may or may not bear small teeth on one or both edges. The 

 area of ducts may or may not be conspicuous ; when visible is gran- 

 ular in appearance with duct openings visible. The two valves of 

 the pair are joined one to the other by a chitinous connection pres- 

 ent on the dorsal edge of the basal area. 



Deltocephalus reflexus Osborn and Ball. 



(PI. XXX, fig. 6.) 



Length, 1.18 mm.; greatest width, 0.09 mm. About the same width for en- 

 tire length; tapers gradually caudad to tip; no preapical prominence; slightly 

 but distinctly curved, tip gradually narrowed, extreme apex sharply pointed, 

 chitinization light; strengthening rod extends caudad as far as tenth doi"sal 

 tooth from tip, nearly meeting dorsal edge. Toothed area on dorsal edge oc- 

 cupies somewhat less than the apical half of the valve; teeth about forty in 

 number, rather small, of various sizes and shapes, presenting an irregular, 

 crenulate margin; a few of the larger teeth bear secondary teeth; the extreme 

 tip bears no teeth ; ducts inconspicuous, invisible except for apices and circular 

 openings; open along ventral apical edge, along dorsal edge of toothed area, 

 and irregularh- in the basal portion of the valve; the two valves of the pair 

 are joined one to the other by a poorly defined, rather elongate, heavily chit- 

 inized connection present on the dorsal edge a little past a third of the length. 



Deltocephalus weedi Van Duzee. 



(PI. XXX, fig. 7.) 



Length, 1.05 mm.; greatest width, 0.13 mm. Narrow and rodlike at base; 

 a somewhat wider, rather heavily chitinized area extends almost to midpoint ; 

 the apical half is occupied by a still wider, less heavily chitinized area which 

 tapers to apex; preapical prominence wanting; slightly curved, tip greatly 

 narrowed, extreme apex rounded, chitinization moderately heavy; heavier than 

 in D. reflexus; strengthening rod extends caudad as far as or beyond last dor- 

 sal tooth. Toothed area on dorsal edge occupies a little more than the apical 

 half of the valve; about thirteen large primary teeth, these are comparatively 



