AMERICAN COLKOPTERA. 469 



soniewlmt constricted, sides subiiaiallcl heliind tlie middle, rounded before, lateral 

 tubercles prominent, acute, anterior cusps distinct, acute and ratlier distant, dorsal 

 channel ill-defined, entire, expanding anteriorly into a trianjrular. not dee))ly 

 impressed fossa, surface densely punctured, punctures rather larjie, each bearing 

 a small scale, sides densely clothed with whitish scales ; scutel very small, scarcely 

 visible. Elytra trapezoidal, two-fifths wider at the base than the prothorax, 

 humeri prominent, sides nearly straight and narrowed posteriorly for three- 

 fourths their length, rather suddenly rounded to the apex, strije rather wide, 

 more deeply impressed )iear the base, punctured, punctures small and more or 

 less concealed by the scales, alternate intersjjaces a trifle more convex, punctured, 

 outer inters]>aces with a row of distant, very small, acute granules, each bearing 

 a short, recurved seta : pygidium densely punctured, underside as in the pre- 

 ceding species; ante-coxal ridges distinct. Legs slender, third tarsal joint nearly 

 twice the width of the second, fourth sliorter than the two jireceding joints 

 together, claws divergent. Length 2.75 mm. ; 0.11 incli. 



% . First and second ventral segments impressed, tibise not unguiculate. 



Hab. — Nevada. 



Four specimens in Dr. Horn's coll. are before nie. Its nearest 

 aljy is ceneosquamosiis. 



M. jeiieosqiiaiiiO!iiiiN n. sp. — Oval, convex, dark piceons, antennse and 

 legs ferruginous, above not dense clothed with small scales having a brassy lustre 

 indistinctly mottled with pale spots. Beak, antennae and head as in the preced- 

 ing species ; prothorax one-half wider than long, nearly straight on the sides 

 behind, rather suddenly narrowed in front and broadly constricted at the apex, 

 constriction not extending upon the disc, lateral tubercles prominent, acute, an- 

 terior cusps about as large, rather distant, dorsal channel broad, exi)anding ante- 

 riorly into a triangular fossa, an oblicpie im])ression in front of the lateral tuber, 

 cles, surface densely punctured, sides densely clothed with yellowish gray scales: 

 scutel very small. Elytra oval, convex, two-fifths wider' at the base than the 

 prothorax, humeri prominent, sides rounded, striai not deeply impressed, punc- 

 tures small, not closely ajijiroximate, inters]><vces feebly convex, alternate ones a 

 trifle more so. outer interspaces with a row of very small, acute granules, each 

 bearing a short recurved Keta, : pygidium closely and finely punctured; ante- 

 coxal ridges distinct, underside densely punctured and sc<ily. Legs and tarsi as 

 in the preceding. I>e!)gtli 2.25 2.75 mm.; 0.09-0.11 inch. 



%. Second venft-al segment segment with a small, longitudinal fovea, sur- 

 rounded anteriorly by a i>atch of large yellow scales. 



Hab. — Oregon, Texas. Dr. Horn's and Nat. Mu.s. collections. 



Three males and six females are before me. This species closely 

 resembles obHCurefasciatus in appearance, but is more convex, the 

 scalQs have a decided brassy lustre, the elytra rounded on the sides, 

 legs entirely ferniginou.s, femora dusky at the base, and lastly the 

 sexual differences of the males. The single specimen from Texas is 

 a little longer than the Oregon specimens but does not differ other- 

 wise. Also closely related to the next species. 



TRANS. AM. KNT. SOC. XXIII. DECEMBER. IHHti. 



