236 The University Science Bulletin. 



Pagaronia tripunctata (Fitch). 



(PL XXVII, fig. 6.) 



Length, 1.5 mm.; greatest width. 0.17 mm. Narrow and rodhke at base, 

 apical shaft broad and flat, about the same width for entire length, narrows 

 caudad to aj^ex; preapical prominence wanting; not curved beyond base, tip 

 narrowed, bkmtly rounded at extreme apex, chitinization Hght ; strengthening 

 rod extends caudad as far as last dorsal tooth. Toothed area on dorsal edge 

 occupies entire length of apical shaft, dorsal edge bearing teeth is more heavily 

 chitinized than the rest of the valve; teeth seventeen to twenty in number, 

 medium in size, in the shape of a flattened obtuse triangle with the caudal 

 side much longer than the cephalic, irregular in size, shape and spacing; bear 

 secondary teeth on both outer edges, three to ten on cephalic edge and three to 

 twenty-five on the caudal edge; tip notched with small teeth on both doreal 

 and ventral edges, not continuous around the tip, 30 present on ventral edge; 

 ducts conspicuous, rather numerous, only slightly curved, most numerous 

 apically; open apically, along dorsal edge in and near teeth, and a few in the 

 surface of valve back from edge. 



Errhomenellu.s montanus Baker. 



(PI. XXVII, fig. 4.) 



Length, 2.83 mm.; greatest width, 0.22 mm. About the same width for en- 

 tire length; preapical prominence present, rather indistinct, broadly rounded; 

 only slightly curved beyond curved basal attachment, tip greatly narrowed 

 with the extreme apex rounded, chitinization medium; strengthening rod ex- 

 tends caudad as far as fourth dorsal tooth. Toothed area on dorsal edge oc- 

 cupies less than a fourth of the entire length apically; teeth seven to eight in 

 number, small, inconspicuous, rounded, regular in size and shape, rather far 

 apart, uneven in spacing, bear no secondary teeth; tip bears no teeth; no dis- 

 tinct ducts visible, circular openings plainly visible, of these a number occur 

 on the ventral apical edge, some at the extreme apex, and also along the en- 

 tire dorsal edge. 



Subfamily GYPONINtE (Stal). 

 Genus Gypona Germar. 



The ovipositors of four species of this genus have been examined 

 and found to be similar. The ovipositor of Xerophloea liridis, the 

 only other species of this subfamily examined, is not similar to the 

 ovipositors of the genus Gypona. In this genus the ovipositor is 

 relatively short, stout and broad, usually being rather heavily chi- 

 tinized. The apical portion is not much, if any, wider than the basal 

 portion. Teeth are present along the dorsal edge for from one- 

 fourth to one-half the apical length. The tip may or may not bear 

 teeth on one or both edges. The ducts in every case are conspicuous, 

 large, elongate and numerous. 



