234 GEO. H. HORN, M. I). 



Male. — Antennal club shorter than the stein. Abdomen flat- 

 tened at middle, penultimate segment with a straight, transverse, 

 rugulose carina, behind which the segment is imj)ressed, so that the 

 carina seems to overhang. Last segment irregularly concave and 

 sparsely granulate, the anterior margin elevated and often extended, 

 forming an oblique carina each side of the median depression. Inner 

 spur of hind tibia long, slender and acute, extending in the axis of 

 the tibia ; outer spur slender and slightly longer. 



Female. — Antennal club shorter than the funiculus. Last ven- 

 tral segment moderately deeply and broadly emarginate, the face of 

 the segment either deeply impressed or irregularly eroded. Hind 

 tarsi distinctly shorter than in the male. 



Variations. — In the tyj^ical form the elytral costse are entirely 

 obliterated, excepting the sutural, but specimens do occur with the 

 discal costffi faintly indicated. The punctuation of the thorax is 

 somewhat variable — from a comi)aratively regular distribution of the 

 punctures to those where it is decidedly irregular and smoother spaces 

 exist. The male antennal club varies a little in length, in some 

 specimens being nearly as long as the stem. The last ventral of the 

 female may have a deep semicircular depression, but every variation 

 from this to an eroded space exists. 



This species resembles some of the feebler forms of corrosa and 

 rugosa, but the sexual characters in either sex will enable them to 

 be separated. 



Occurs in Kansas, Colorado, Indian Territory and Texas. 



22. Li. pruiiiua Lee. — Oblong-ovate, facies moderately robust, castaueous to 

 piceous, surface pruinose in well preserved specimens; when the pruinosity is 

 removed the surface is feebly shining. Clypeus broadly emarginate, margin 

 narrowly reflexed, surface densely punctured, the front more coarsely and 

 roughly punctured. Thorax narrowed in front, sides behind nearly parallel, iu 

 front oblique, margin coarsely serrate, sparsely ciliate, basal marginal injpressioii 

 indistinct, disc with very coarse (sometimes variolate) punctures, closely placed, 

 dense near the front angles, median line u.sually smoother. Elytral punctures 

 fine, indistinct, usually sparsely placed, the costfe always moderately distinct. 

 Pygidium finely punctate, nearly smooth in the female. Metasternuni densely 

 punctured, the hair moderately long and dense % or sparser and much shorter 

 J . Abdomen sparsely indistinctly punctate, the last two segments more coarsely. 

 Claws curved, strongly toothed at middle in both sexes. Last joint of maxillary 

 palpi elongate fusiform, not impressed. Length .67 — .74 inch; 17 — 18.5 mm. 



Male. — Antennal club a little longer than the funiculus. Abdo- 

 men flattened at middle, penultimate segment (fig. 27 ) with a strongly 

 elevated, transverse, rugulose ridge, behind which the segment is 



