PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 75 



each puncture with a short decurved yellow hair. Antennal club not 

 abruptly formed, ninth joint evidently not quite as wide as the 

 eleventh, the latter transverse. 



Pronotum as wide as long, widest at middle where the sides are 

 subangulately prominent at end of the antennal fossae, thence strongly 

 convergent and nearly straight to the apex, feebly convergent and 

 slightly arcuate or feebly bisinuate to the basal angles, which are 

 rectangular or feebly prominent laterally and slightly blunt; apex 

 feebly emarginate and the angles obtuse and not prominent anteri- 

 orly; base broadly arcuate, sinuate near the angles; disk very 

 moderately convex, impressed along the middle, often more or less 

 obscurely so posteriorly; rather broadly and arcuately impressed and 

 smooth behind the antennal fossae with the lateral margin quite 

 strongly reflexed, anteriorly slightly less so and forming the inner mar- 

 gin of the antennal fossa ; surface coarsely but not densely tuberculose 



Figure l.— Diagrams showing relation between the fifth and seventh costate intervals 



OF THE ELYTRA IN USECHUS: a-a, SUMMIT OF THE APICAL DECLIVITY; A, LACERTA MOTSCHULSKY; 

 B. HORNI N. VAR.; C. SANTACLARAE N. VAR.; D, TRINITATI3 N. VAR.; E, NUCLEATUS CASEY 



and with an elongate-oval pitlike depression at middle near the base, 

 and an antebasal transverse impression extending from near the 

 basal angle to the side of the median impression. 



Prosternum with coarse tubercles like those of the upper surface, 

 each tubercle with a stiff yellow hair. Intercoxal process short, hor- 

 izontal, truncate, and feebly bisinuate at apex, scarcely extending 

 beyond the posterior border of the acetabula; surface impressed at 

 middle of apex and within the lateral margins against the acetabula. 



Elytra about one-half longer than wide, a little wider than the 

 pronotum; sides parallel to feebly arcuate, broadly sinuate between 

 the tubercle on the lateral margin of the declivity and the apical 

 tumescence. Surface coarsely punctate, punctures in single rows 

 and the alternate intervals costate as follows: Intervals 3, 5, and 9, 

 distinctly costate, the seventh feebly so, but not joining the fifth at 



