NORTH AMERICAN COLEOPTEUA. 51 



taceous with darker club. Head convex, without trace of frontal tubercles, 

 coarsely punctate, less densely at middle of clypeus and very closely at the sides ; 

 clypeus very broadly and feebly emarginate, the angles broadly rounded, the 

 sides feebly arcuate, gense. feebly prominent, obtuse. Thorax twice as wide as 

 long, narrower in front, the sides very feebly arcuate, the hind angles distinct, 

 but obtuse; base arcuate, without marginal line, disc convex, the punctures rela- 

 tively coarse and equal and very evenly disposed over the entire surface, scarcely 

 closer at the sides. Elytra as wide at base as thorax, humeri distinct, sides par- 

 allel, the strife not deep, but moderately coarse and close, the intervals flat, very 

 distinctly biseriately punctate. Metasteruum at sides with a few coarse punc- 

 tures, abdomen indistinctly punctate, Mesosternum opaque and alutaceous, an 

 oval smoother space at middle, not carinate between the coxfe. Anterior tibiae 

 smooth in front, tridentate externally and denticulate above, the first tarsal joint 

 shorter than the second. Posterior femora sparsely punctate, the first tarsal 

 joint as long as the next three. Length .12 inch ; 3 mm. 



The unique befin-e nie is probably a male, it has the interior tibial 

 spur rather stout and slightly arcuate. The elytra are very dis- 

 tinctly marked. The sutural interval is piceous. The oblique stripe 

 of the disc is rather broad, begins behind the humeral umbone, ex- 

 tends two-thirds to apex, ends obtusely, its inner edge reaching the 

 second stria. The subapical spot is posterior to the end of the ob- 

 lique band. At the side the piceous space is adjacent to the margin 

 and is not of great extent. 



This is the smallest genuine Aphodius in our fauna, and remark- 

 able in its very distinct and relatively coarse sculpture for so small 

 a species. The absence of a basal marginal line in a species in this 

 part of the series is remarkable. 



One specimen from New Mexico. 



A. teriiiinalis Say. — Oblong oval, moderately convex, black, shining, apex 

 of elytra reddish brown. Antennse and palpi piceous. Head convex, without 

 trace of tubercles, coarsely punctate, slightly rugose at sides and in front. Cly- 

 peus hemihexagoual, feebly emarginate in front, the angles obtuse, sides very 

 feebly arcuate, gense feebly prominent, rounded. Thorax convex, slightly nar- 

 rower in front, sides nearly straight posteriorly and slightly convergent ante- 

 riorly, in front feebly arcuate, hind angles nearly rectangular, somewhat obtuse. 

 Iiase arcuate and with distinct marginal line, disc convex, very sparsely finely 

 punctured at middle, punctures coarser and closer toward the sides, especially 

 near the front angles. Elytra as wide at base as at the thorax, humeri distinct, 

 but obtuse ; strife fine, but moderately deep ; punctures close, not cx)arse; inter- 

 vals very flat, indistintly biseriately i)unctuhite. Mesosternum very opaque, not 

 carinate between the coxae. Metasternum opaque, subgranulate. .\bdomen more 

 shining, alutaceous, sparsely indistinctly punctate. Anterior tibise smooth in 

 front, tridentate externally, crenate above, the first tarsal joint shorter than the 

 second. Posterior femora coarsely sparsely punctate, the first tarsiil joint shorter 

 than the next three. Length .16-.20 inch ; 4-5 mm. 



