66 Trans. Acad. Sci. of St. Louis. 
unmodified, the slit of the sixth very narrow and deep, nearly four 
times as deep as wide, its sides straight and parallel, the bottom evenly 
-and circularly rounded, the edges finely beaded; female unknown. 
Length 4.8 mm.; width 0.8mm. Iowa.............----iOWensSiS 0. sp. 
Elytra with the basal angles widely exposed at base; body stouter, the 
head almost semicircularly rounded behind the eyes and slightly nar- 
rower ‘than the eClytra a. oes oes cre tner caves acienvoacsaieupascdewesehakD 
10 —Body subparallel; head very slightly loager than wide, the eyes rather 
well developed but only moderately prominent, at about one-half more 
than their own length from the base, the portion behind them semi- 
circularly rounded from eye to eye, with feeble truncation at the neck; 
prothorax slightly elongate and a little narrower than the head; widest 
at about a third from the apex, the sides broadly arcuate; base four- 
fifths of the maximum width; elytra quadrate, parallel, scarcely longer 
than wide, equal in length to the prothorax and a fifth wider; abdomen 
parallel, distinctly narrower than the elytra. Male with the slit of the 
sixth ventral only moderately narrow, scarcely three times as deep as 
wide, with its sides straight and parallel but arcuately converging in 
anterior two-fifths, the bottom evenly, parabolically rounded; edges 
finely beaded throughout; sixth ventral in the female strongly impressed 
along the middle. Length 4.2-5.6 mm.; width 0.78-1.0 mm. New York, 
Virginia, North Carolina and Iowa.......+.....+. ---- littorarius Grav. 
Body, head and eyes throughout nearly as in littorarius, the sides of the 
head behind the eyes more unevenly arcuate, becoming straighter near 
the eyes; prothorax narrower, smaller andrelatively more elongate, much 
narrower than the head, the sides strongly, evenly arcuate, the base 
narrower, three-fourths of the maximum width, the Jatter at fully two- 
fifths from the apex; elytra slightly longer than wide, parallel, a fourth 
wider than the prothorax and evidently a little longer; abdomen as wide 
as the elytra. Male with the slit of the sixth ventral about three times 
as deep as wide, having the form of a very narrow deep parabola, its 
sides becoming almost parallel behind, the edges finely beaded and the 
surface of the segment adjoining anteriorly slightly flattened; female 
unknown. Length 5.2 mm.; width 0.9mm. Washington State. 
pugetensis n. sp. 
11— Form slender, nearly parallel, the head rather narrow and elongate, 
the eyes moderate in size, at about two-thirds more than their own 
length from the base and only moderately prominent, the sides behind 
them distinctly convergent to the neck, at first nearly straight, then 
rather broadly rounded through the basal angles, the base moderately 
broadly truncate, the head similar throughout in the sexes; prothorax 
distinctly elongate-oval, a little narrower than the head, widest before 
the middle, with the sides broadly arcuate; elytra slightly wider than 
the head, the sides subparallel, the apex rather distinctly and angularly 
emarginate, not quite as long as wide and scarcely as long as the pro- 
thorax in the male, quadrate and equal in length to the latter in the 
female; abdomen as wide as the elytra. Male with the slit of the sixth 
ventral fully three times as deep as wide, parallel, its sides nearly 
straight but gradually and parabolically converging anteriorly, the 
edges finely and strongly beaded, the bead bounded externally bya fine 
