238 The University Science Bulletin. 



heavy; strengthening rod extends caudad almost to apex. Toothed area on 

 dorsal edge occupies about a fourth, of the apical length ; teeth very few in 

 number, small, flat, somewhat rounded, very irregular in size, shape and 

 spacing, bear no secondary teeth; no teeth present at extreme apex; ducts 

 conspicuous, large, somewhat branching, more numerous apically; open 

 apically, along ventral apical edge, and along dorsal for entire length. 



Xerophloea viridis (Fabricius). 



(PL XXIII, fig. 2; PI. XXIX, fig. 2.) 



Length, 2.88 mm.; greatest width, 0.08 mm. Narrow and rodlike, about the 

 same width for entire length; distinctly curved, tip bluntly rounded, chitiniza- 

 tion medium; strengthening rod extends caudad as far as twentieth dorsal tooth. 

 Toothed area on dorsal edge occupies a little less than the apical third; teeth 

 twenty-four in number, medium in size, rounded, regular in size and shape, 

 the apical four are farther apart than the basal twenty; the apical three bear 

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

 on both dorsal and ventral edge, not continuous around the tip, twelve to 

 thirteen on ventral edge; ducts conspicuous, relatively few in number, most 

 numerous at apex; open apically and along entire dorsal edge, even in basal 

 portion. 



Subfamily JASSIN./E (Amyot and Serville). 



Tribe Acucephalini (Dohrn). 



Stroggylocephalus agrestis (Fallen). 



(PI. XXIX, fig. 3.) 



Length, L88 mm.; greatest width, 0.17 mm. Curved base rather narrow 

 and rodlike, rather broad and flat beyond base, about the same width for 

 entire length, tapers gradually toward apex; curved at base of broadened area, 

 tip greatly narrowed with extreme apex narrowly rounded, chitinization rather 

 light, strengthening rod extends caudad as far as sixth dorsal tooth from apex. 

 Toothed area on dorsal edge occupies a little less than half the entire length, 

 teeth twenty-six to twenty-eight in number, rather small, of a general tri- 

 angular shape, some roimded and some sharply pointed, verj' irregular in size, 

 shape and spacing; bear no secondary teeth; tip notched with a few small, 

 indistinct, irregular teeth on the ventral edge only; ducts conspicuous, elongate ; 

 open along ventral apical edge, at extreme apex, and along entire dorsal edge; 

 the two valves of the pair are joined one to the other by a distinct, elongate, 

 heavily chitinized connection present on the dorsal edge near the base of the 

 broadened area. 



Memnonia consobrina Ball. 



(PI. XXIX, fig. 5.) 



Length, 2.2 mm.; greatest width, 0.25 mm. Gunned basal attachment nar- 

 row and rodlike, beyond base is a rather narrow, lightly chitinized area ex- 

 tending caudad for about a third of the length; caudad of this is a broader, 

 more heavily chitinized portion occupying the rest of the valve; narrows, 

 rather abruptly caudad to apex; only slightly curved beyond base, tip greatly 

 narrowed by broadly cui-ving doi-sal edge; extreme apex ends in sharp, acute- 



