240 Trans. Acad. Sci. of St. Louis. 



arcuate sides extending almost throughout the width of the segmental 

 apex, with the edge not beaded but broadly beveled, the apical angle 

 not as acute as in the preceding and the opening width twice the depth. 

 Length 3.7 mm.; width 0.53 mm. Mississippi (Vicksburg). 



ortiatellus n. sp. 



13 — Elytra small, subequal in length and width to the prothorax. Form 

 very slender and linear, almost perfectly parallel, pale ochreo-iesta- 

 ceous in color, the head and the last two to three of the abdominal 

 segments black; head of the usual form, distinctly longer than wide, 

 well developed and distinctly wider than the elytra, the eyes moderate 

 in size and prominence; prothorax relatively large, longer than wide, 

 sensibly narrower than the head, the sides rather broadly rounded at 

 apical third or fourth, thence strongly converging and nearly straight 

 to the basal angles; elytra small, slightly elongate, only very slightly 

 narrowed at apex, equal in width to the prothorax and only just visibly 

 longer; abdomen rather broad, at base equal in width to tne elytral 

 apex, and, posteriorly, wider than any part of the elytra. Male with 

 the fifth ventral narrowly and very feebly impressed along the middle, 

 the notch of the sixth moderately large, its sides broadly flaring, arcuate 

 and broadly beveled, its opening equaling half of the segmental width 

 and its apical angle moderately acute. Length 3.0-3.7 mm.; width 

 0.5-0.52 mm. Iowa brevipeimis Aust. 



Elytra larger, much wider and longer than the prothorax. Form stouter, 

 subparallel, pale ochreo-testaceous, the head and last two abdominal 

 segments black or blackish; head smaller, not quite as wide as the 

 elytra, the eyes much less convex and scarcely at all prominent, at 

 barely their own length from the base, the converging sides short be- 

 hind them, the angles broadly rounded; prothorax distinctly narrower 

 than the head, only slightly elongate, the sides rather broadly rounded 

 at apical fourth, thence but moderately converging and nearly straight 

 to the broadly arcuate basal angles; elytra slightly elongate, sensibly 

 narrowed near the apex, about a third wider and longer than the pro- 

 thorax; abdomen unusually broad, slightly wider posteriorly but 

 everywhere narrower than the elytra, rather finely, closely asperulate. 

 Male unknown. Length 3.4 mm. ; width 0.6 mm. Virginia (Norfolk). 



fusciceps n. sp. 



14 Form very slender, subparallel, pale ochreo-testaceous throughout, 



except the last two abdominal segments, which are black; head rather 

 small, elongate, distinctly narrower than the elytra, the eyes convex, 

 prominent and at distinctly more than their own length from the base, 

 the sides behind them rather strongly converging to the moderately 

 rounded basal angles; prothorax but slightly elongate, obviously nar- 

 rower than the head, the sides rather broadly rounded somewhat 

 behind apical fourth, thence moderately converging and nearly straight 

 to the broadly rounded basal angles; elytra much elongated, distinctly 

 and gradually narrowed toward tip, a third or fourth wider and two- 

 fifths longer than the prothorax; abdomen moderately slender, at base 

 slightly narrower than the elytral apex and but little wider near the tip. 

 Male sensibly more slender than the female throughout the body and 

 head, the fifth ventral unmodified, the sixth with a very acute cusp- 



