NORTH AMERICAN COLEOPTERA. 



239 



T^Iale.— Antennal club (fig. 4) a little longer than the stem. Ab- 

 domen flattened at middle, the i)enultimate segment with a feebly 

 elevated, transverse ridge near the posterior border, sometimes merely 

 a slight rugulose convexity, the last segment with a smooth, moder- 

 ately deep fovea. Inner spur of hind tibia slender, half the length 

 of the outer. 



Female.— Antennal club nearly as long as the funiculus. Last 

 ventral segment broadly and moderately deeply emarginate. Py- 

 gidium gibbous, and very smooth at apex. Hind tarsi distinctly 

 shorter than the male. 



Variations.— Specimens vary from the normal type of thoracic 

 punctuation in having the punctures rather coar.ser and less dense 

 and the costaj, especially the first discal, more developed, and the 

 entire surface more rugulose. 



This species is one of the most broadly ovate in our fauna, ap- 

 proaching farda, but less ventricose. Recent specimens are probably 

 decidedly iridescent, several in my cabinet show it faintly, but the 

 usual alcoholic collecting seems to deprive the surface of the lustre. 



With this species robmta and obesa must be united ; the former 

 was placed among the species with 9-jointed antenna?, but this is 

 purelv an error of observation, but the measurement given, .92 inch, 

 is possibly a typographical error. 



Occurs from Kansas to Texas. 



'^o. 



,.,. L,. subpruinosa Casey.— Oval, slightly oblong, castaneous, feebly 

 pruinose, slightly shining. Clypeus very feebly sinuate at middle, the margin 

 moderately reflexed, punctures moderately coarse not dense, frontal punctures 

 slightly coarser and less close. Thorax narrowed from base to apex, sides feebly 

 arcuate, more oblique in front, margin entire, sparsely ciliate, punctures moder- 

 ately coarse, regularly not closely placed, a slight impression of the base each 

 side. Elytral punctures as coarse as those of the thorax and rather more closely 

 placed, sutural costa distinct, but narrow, the discal costs scarcely visible, the 

 submarginal faintly indicated. Pygidium convex, smooth and shining, except a 

 few i>unctures each side % . Metasternum densely punctured, the hair moder- 

 ately long, but not dense. Abdomen sparsely indistinctly punctured, opaque. 

 Claws feeWy curved, the tooth quite small and median. Last joint of maxillary 

 palpus fusiform, acute, not impressed. Length .60 inch ; 15 mm. 



Male.— Antennal club as long as the stem. Abdomen slightly 

 flattened at middle, penultimate segment slightly gibbous at the mid- 

 dle of the posterior border and somewhat granulate. Last segment 

 with a smooth cupuliform depression, .slightly emarginate at apex. 

 Inner spur of hind tibia two-thirds the length of outer, both slender. 

 Variations.— Eight si)ecimcns have been seen not diflering even 

 in color. 



