252 The University Science Bulletin. 



Euscelis bicolor (Van Duzee). 



(PI. XXXI. fig. 6; pi. XXIII, fig. 14.) 



Length, 0.92 mm.; greatest width, 0.11 mm. Apical portion shghtly wider 

 than basal portion, tapers caiidad to apex; no preapical prominence; distinctly 

 curved, tip gradually narrowed, ends in naiTowly rounded extreme apex, 

 chitinization rather light; strengthenuig rod extends caudad as far as next 

 to last dorsal tooth. Toothed area on dorsal edge occupies apical two-fifths 

 of length; teeth twelve to thirteen in number, small, rounded, fairly regular 

 in size, shape and spacing; bear a few small secondaiy teeth on caudal edge, 

 margin of valve also notched with small secondar>' teeth; tip notched with 

 small teeth on ventral edge only, eight to ten in number; area of ducts con- 

 spicuous, granular in appearance, duct openings visible; open along ventral 

 apical edge, at extreme -apex, along dorsal edge of toothed area, and in basal 

 region, where elongate ducts are visible; the two valves of the pair are joined 

 one to the other by an elongate connection only slightly more* heavily 

 chitinized than the rest of the basal area, occupying about one-sixth of the 

 entire length. 



Genus Eutettix Van Duzee. 



The ovipositors of two species of this genus have been examined 

 and found to be generally similar, though possessing many differ- 

 ences. In each case the basal half is somewhat narrower than the 

 apical half, which narrows toward the apex and bears teeth along 

 its dorsal edge. The teeth vary in number, size, shape, and posses- 

 sion of secondary teeth in the two species. The tip is notched with 

 small teeth on one or both edges. The area of ducts is conspicuous, 

 granular in appearance, with the duct openings visible. The two 

 valves of the pair are joined one to the other by a chitinous con- 

 nection present on the dorsal edge of the basal area. 



Eutettix cinctus Osborn and Ball. 



(PI. XXIV, fig. 1; pi. XXXI, fig. 8.) 



Length, 1.5 mm.; greatest width, 0.17 mm. Apical portion but slightly wider 

 than basal portion, narrowed caudad toward apex; no preapical prominence; 

 distinctly curved, tip narrowed, extreme apex broadly rounded, chitinization 

 moderately heavy; strengthening rod extends caudad as far as fourth dorsal 

 tooth from apex. Toothed area on dorsal edge occupies apical half of valve; 

 teeth fourteen in number, of medium size, rounded, fairly regular in size, shape 

 and spacing; bear secondary teeth, one to four on caudal edge; cephalic edge 

 may also bear a single secondary tooth ; margin of valve is notched with small 

 secondary teeth between primary teeth; a few faintly visible teeth are present 

 on the ventral edge of the tip, the dorsal edge is devoid of teeth at the extreme 

 apex, about nine present on,; the ventral edge; area of ducts conspicuous, 

 granular in appearance, duct openings easily visible; open along ventral apical 

 edge (seventeen to nineteen), at extreme apex (three), along dorsal edge 

 of toothed area, and in the basal region where elongate ducts are visible; the 



