44 WILLIAM G. DIETZ, M. 1). 



with paler spots ; humeral spots and scutelliini white. Abdomen glabrous, finely 

 punctate, each puncture bearing a short, white hair. Legs moderately long and 

 slender; third joint of anterior tarsi dilated, much wider than posterior tarsi 

 in the %, . Length 4.5-5 mm. ; .18 .20 inch. Plate I, fig. 12. 



% . Last ventral not impressed. 



9 . Last ventral transversely concave. 



M. lineatulas Say, is the form, densely covered with grayish scales, 

 completelv concealing the punctures, and the tlioracic furrows more 

 distinct. 



Hab. — Eastern and Western States. 



M. loilguliis n. sp. ^Closely resembling the former in size and form, from 

 which it diti'ers as follows : Body piceous black. Antennse, elytra and legs ferru- 

 ginous ; glabrous, with a few inconspicuous scales. Thorax rounded at the sides, 

 not impressed, median groove absent, more distinctly transverse than in sparsics ; 

 punctures a trifle finer. 



% . As in sparsus 



9 . Last ventral with a large, transverse fovea. 



A very distinct species, easily recognized by its shining, ferrugin- 

 ous elytra. It might be confounded with abraded, immature speci- 

 mens of spai'sus, when the above characters will determine the species. 



Hab. — Dakota (Dr. Horn), Wyoming (Butler). Three specimens. 



i?I. rot iiil«li<*<»llis n. s]). — Oljloug, black ; antennae, tibia? and tarsi fuscous, 

 clothed with dark piceous scales. Rostrum as in the preceding species; as wide 

 as the head, subsulcate. Prothorax transversely suborbicular, base and sides 

 equally rounded, hind angles obsolete, feebly constricted at tip; moderately con- 

 vex, surface finely and densely punctate ; an obscure median line and sides 

 whitish, latter enclosing an oblong, dark spot. Elytra scarcely one-third wider 

 than the thorax and strongly emarginate at base, imperceptibly narrowed for 

 three fourths their length and rather rapidly rounded to the apex, latter scarcely 

 compressed. Strire broad, feebly imjiressed, with large, subquadrate, approximate 

 punctures, latter about as wide as the interstices and not concealed by the scales ; 

 interstices a trifle convex, alternate ones slightly more elevated toward the base, 

 each bearing a row of slender, not very conspicuous setae. The scales are rather 

 large and appear to be matted together; when removed the surface is very shin 

 ing; scutellum, humeri and a few irregular spots near the convexity whitish. 

 Underside coarsely punctate; pectus moderately covered with scales. Legs and 

 tarsi similar to the preceding species; anterior tarsi of % less dilated. Length 

 4 mm. ; .16 inch. Plate 1, fig. 13. 



% . Last ventral segment faintly in)j)ressed. 



9 . Apex of last ventral segment deeply and sharply foveate, 

 emarginate. 



]Iab. — Texas. Five sj)ecimens ; Dr. Horn and jNIr. Ulke's coll. 



