46 WILLIAM G. DIETZ, M. D. 



Head scarcely convex between the eyes ; transverse impression at base of rostrum 

 very distinct. 

 Elytral interstices more convex, setae stouter, more approximate ; tarsi less 



elongate liirtolliis. 



Elytral interstices less convex, setas more slender; tarsi longer. .ooliiiisitlis. 

 Head strongly convex, transverse basal impression almost obsolete. ..obtectus. 



jfl. liirtellllS n. sp. — Oblong, moderately stout, rufopiceous, densely cov- 

 ered above with dark piceous scales, mottled on the elj^tra with pale, brownish 

 spots. Rostrum stout, subangulate at the sides, slightly shorter than the thorax ; 

 narrowed from base to the insertion of the antennse and moderately dilated at 

 tip, strongly tricarinate, median carina entire, spaces between the carinse and 

 the lateral margin subsulcate, each with a row of approximate, erect, stout, club- 

 shaped bristles; surface longitudinally rugose, thinly clothed with fine squami- 

 form hairs. Scrobes profound, directed toward lower half of the eyes. Head 

 short, trapezoidal, scarcely convex, densely punctate and rather densely clothed 

 with yellow, filiform scales; supraorbital sulcus very distinct, separated from the 

 beak by a broad, slightly curved sulcus, the upper edge of which is rather 

 sharply elevated and fringed with stout, erect hairs like those of the beak. 

 Thorax about one-half wider than long, subconvex ; sides broadly rounded ; apex 

 not constricted, narrower than the base; surface densely and coarsely punctate, 

 punctures completely concealed by the scaly vestiture, latter intermixed with 

 stout, erect, club-shaped hairs; median vitta and sides pale, latter enclosing an 

 oblong, dark spot. Elytra one-third wider than the thorax, slightly narrowed 

 from humeral angle to three-fifths their length, thence gradually narrowed to 

 and conjointly rounded at tip, latter very slightly compressed. Striae well im- 

 pressed, punctures large, not closely placed ; interstices scarcely wider than the 

 punctures, moderately convex, when deprived of scales, but subcostiform with 

 the latter intact, each with a row of stout, conspicuous, closely placed setae which 

 are semiprocumhent on the disc, but erect on the convexity; scutellum, humeral 

 si)ots, three transverse, ill defined bauds and a few scattered, smaller spots, pale. 

 Underside densely punctured, hirsute, pectus sparsely covered with small, dirty 

 grayscales. Legs moderately stout; tarsi moderately long. Length 3.75-4 mm. ; 

 .15-.16 inch. Plate I, fig. 15. 



% . Last ventral not impressed. 



9 . Last ventral segment with a small, round fovea near the 

 apex. 



Hah- — New Mexico, Arizona. 



M. ecliiiiatus n. sp. — Broadly oblong, rufopiceous, not very densely cov- 

 ered with grayish white or yellowish brown scales, which are especially large 

 on the elyti-a. Rostrum stout, broad, subparallel, shorter than the thorax, slightly 

 rounded at the sides, median carina evident, but feeble; lateral ones obsolete; 

 surface rugulose, thinly clothed with fine filiform scales, and especially near the 

 base, with a few large, round scales, intermixed with numerous, erect, setae. 

 Head slightly convex, densely punctate, clothed with filiform scales; scarcely 

 wider between the eyes than rostrum at base, separated from latter by a slightly 

 curved sulcus, latter densely scaly. Scape of anteunaj attaining the eye about 

 the middle, scrobes less directed inferiorly than in the two preceding species. 



