50 WILLIAM G. DIETZ, M. D. 



wider than base of thorax, sides and convexity less densely scaly, iiiflexed por- 

 tion covered with scaly pubescence ; scales light brown, a few subquadrate spots 

 and some fasciaform patches of the convexity, of whitish scales; scaly pubes- 

 cence reddish brown, having a somewhat cupreous lustre, and is especially dense 

 along the suture. Underside, legs and tarsi same as in mirabUis. Length 5 mm. ; 

 .•20 inch. Plate I, fig. 16. 



% . Apex of last ventral segment flattened, scarcely impressed. 



9 . Last ventral with large, quadrate, sliarply defined fovea, ex- 

 tending whole length of segment, but not emarginate. 



Hab. — Wyoming, Nebraska. Stouter and of darker color than 

 the preceding species. 



M. Iiiiiniliiii Gyll.— Smaller and narrower than vittaticollis, which it resem- 

 bles, and to which it is very closely related ; beak longer and less stout, a trifle 

 wider at apex than at base and almost as long as the thorax, latter less transverse 

 and less than one-half wider than long, sides less rounded, median carina broader, 

 irregular, and generally abbreviated at either end, never concealed by scales; an 

 obscure fovea in front of scutellum, covered with whitish scales ; median vitta 

 absent; pubescence of head, rostrum and thorax much finer, grayish white, 

 rarely of metallic lustre. Elytra: humeri less prominent, rounded and not sub- 

 angulate posteriorly ; scaly pubescence much finer and less dense, whitish, 

 slightly metallic in scutellar region and along the suture ; scales whitish. Length 

 4-4.5 ram. ; .16-.18 inch. 



S . Same as in vittaticollis. 



9 . Last ventral segment with a large subquadrate, but not 

 sharply defined fovea. 



M. maculicollis Kirby, is a variety, with the lateral thoracic vitta 

 obsolete in its anterior half, thereby giving the appearance of three 

 basal spots. 



Hab. — Eastern and Western States. 



fl. calilV>riii<'ii»>> n. sp. — Elongate-elliptical ; dark piceous, densely clothed 

 above with brown and rather coarse pubescence. Rostrum stout, subconvex, 

 tricarinate ; median carina prominent, entire, lateral carinse abbreviated ante- 

 riorly and not very evident, rugulosepunctate ; finely pubescent, transversely 

 impressed at base. Head convex, slightly wider than rostrum at base and densely 

 pubescent. Thorax a trifle wider than long, apex scarcely narrower than the 

 base ; sides regularly and broadly rounded, apex feebly constricted, anterior 

 margin slightly rounded. Surface densely punctate, obliquely indented each 

 side in front and very obscnirely impressed at the sides; median elevated line 

 very fine, linear; disc clothed with rather coarse, yellow pubescence, side and 

 antescutellar spot with whitish scales; a dark, lateral thoracic spot, visible when 

 viewed from above. Elytra about one-third wider than the thorax, slightly 

 emarginate at base, humeri prominent, rounded, sides subparallel for two-thirds, 

 then gradually narrowed to and rounded at tip, latter slightly compressed. 

 Striae well impressed, with longitudinal, approximate punctures: interstices flat, 

 si'tiB short, slender and inc()ns])icuous : pubescence rather coarse, dense, scale 



