KXi LRNO AM) llAMII/rON. 



Tarsi % witli scariroly a trace of spon^ry ]Mil)(;siL'iK'e on any of Die Joints ; 

 tliorax coarsely punctured, the lateral Ki>iiie moderately lon^' and acute. 



fori*'. 



7. Thorax sparsely i)unctn red, without trace of lateral tubercle; elytra coarsely 



punctured ; hind tarsi with a small spongy pubescent spot at the apex 

 of the first Joint, the second and third joints entirely spongy i)ul)es- 

 ccnt ^iubriiKOMiiin. 



8. Intercoxal process of mesosternuni rather deeply grooved in its entire linglii ; 



elytra variegatcMl with a network of very fine ])ubescence in at least 

 one sex. 

 Elytra distinctly wider at base than the thorax, the humeri slightly promi- 

 luait; thorax with very few jiunctures, and the.se placed along the base 



and apex ; pultescence of elytra white Illkd. 



Klytni not wi<ler at l)ase than the thorax, the humeri roundiMl ; thorax with 

 nniiicrons piinclnreson the disc; j)ube8cence of elytra fulvous. 



vai*i4»l»rv. 

 Intercoxal process of niesoslcrnuni nearly Hat, not grooved ; elytra not pubes- 

 cent eraswiiiii. 



The sexes of Moinlciim are distinguislied by the foi-in ol' tlu- lust 

 ventiiil se<iiiient broadly einar<>;inate in the male and oval at tip in 

 the leniale. The femora ai'e stroiio'ly (^lavate in the male, eompara- 

 tively slendei' in the femah;. The pygidium is usually eoncealed in 

 the male, exposed in the female. 



J am indebted to Mr. Henry IJlUc! for a statement of the s^ex oi' 

 his specimen of .1/. ohivatim, of which .species it is the type, and ,so 

 far as 1 know the only reprowentative. 



BIBLIOGRAPHY. 



M. annulatum Say, 1821. Journ. Ac. Phil. p. 101; rjet-'onte, ed. ii, 1«7; Lee, 

 1H,')2, Journ. Ac. Phil. ser. 2, ii, p. I(i7 ; Lacord, (iren. Atl. x, pi. 97, fig. 2. 

 Length .48. 72 inch.; 12-18 mm. //rt/<//«^ — Arizona, New Mexico, Texas, 

 Kansas, Mis.sourl. Nebraska, Colorado, Montana. 

 M. appressum Lee. 18.^)2, 1. c. ]). 1()8; Col. Kan. 1859, p. 21, pi. 2, fig. 17. 



Length .56-1. IG inch.; 11 29 mm. Hnbitat. — Arizona, New Mexico. 

 M. g-lg-as liCC, 187.'{, New Sjiecies, S. M. ('. 2G1, ]>. 2:?(); spinicolle Cas., 1891, 1. c. 



Length 1.20~1.:{() inch.; :}0-34 mm. 7/«6/Va^— Arizona, rare. 

 M. semipunctaturn Fjec, 18r>2, .Journ. Ac. Phil. ser. 2, ii, p. 1G7. 



Length .71-1. tM» inch.; 18..V2r> mm. llahilat. — Cape San Lucas, Lower Cali- 

 fornia. I'are. 

 M. leevigratum Bland, I8(i2, Pmc Lnt. Soc. Phil, i, p. 2()7. 



Length .84-.88 inch. ; 21 22 mm. Jlahitat. — New Mexico, Kansas. 

 M. armafcutn Lee. 1853, Proc. Ac Phil, vi, )). 234; Acan. Nat. 18,W, p. 128. pi. 

 13, lig. 2. 

 lA'iigth .(!(} 1.00 inch.; 1(5.5-25 mm. Habitat. — New Mexico, Texas, Colorado. 



M. obtusum Lee, 1873. New Si)ecies. S. M. C. 264. \\. 230. 



Length .75 inch. ; 19 mm. llnhital. — Utah, very rare. One siiecimen known. 



