34 WILLIAM G. DIETZ, M. D. 



sleuder; anterior tibite incurved at tip; all the tarsi equal, scarcely dilated in 

 the 'I . Length 4.5 mm. ; .18 inch. Plate I, figs. 3, 36. 



% . Last ventral scarcely impressed. 



9 . Last ventral with a narrow, ill defined, longitudinal fovea. 



The scales along the suture and thoracic vittiB have a decidedly 

 brassy lustre, while those of thighs are greenish in one specimen 

 {% ), while in the others they are of a more uniform, grayish color. 



Hab. — California. Mr. Ulke's collection ; two specimens. 



M. iieva«lensis n. sp. — Smaller and more convex than the preceding spe- 

 cies ; dark piceous ; densely covered with pale, silvery scales, having a slight 

 pearly lustre, mottled above with darker spots ; beak as long as the thorax, 

 rather stout, strongly convex, with scarcely a trace of a median, elevated line, 

 and, like the head, densely scaly, intermixed with a fine hair-like pubescence: a 

 broad, transverse, shallow groove at base. Head very convex, with a deep, 

 frontal fovea. Thorax one-fourth wider than long ; base scarcely wider than 

 apex; sides strongly rounded, suddenly and distinctly constricted at tip, the 

 constrictions extending as a distinct, transverse impression to, but not involving 

 the median line; a narrow median and a lateral, bisinuate line, paler. Elytra 

 one-half wider than base of thorax ; almost truncate at base: sides parallel for 

 two-thirds their length, then gradually narrowed and conjointly rounded at tip; 

 humeri prominent; strife well impressed, punctures evident, somewhat distant; 

 intervals slightly convex, each, except second, with a row of long, conspicuous 

 setfe ; surface slightly mottled with darker scales; a pale strip extending from 

 humerus along the sides. Beneath, silvery white. Legs slender; anteniiai and 

 tarsi rufous. Length 4 mm. ; .16 inch. Plate I, fig. 4. 



9 . Last ventral with a small, round, apical fovea. 

 Hab. — Nevada. A single specimen of this pretty species in Mr. 

 Ulke's collection. 



ULKEI Group. 



The species of this group are easily distinguished by their subde- 

 pressed form ; beak rather slender, tapering more or less distinctly 

 from the base to the insertion of the antennae and generally com- 

 pressed toward the apex. The prothoracic lobes are feeble ; the 

 tibiiie denticulate and setigerous along the inner margin ; anterior 

 tarsi of S distinctly dilated ; hind tarsi slender. 



The following table will enal)le the student to identify the species : 



Larger species 4.0 mm. or over; no distinct superciliary ridge and sulcus. 

 Third tarsal joint distinctly longer than the second ; thorax punctured. 



Antennae and tibiae slender ; tarsi fringed with long, flexible hairs, without 

 stiff bristles ; third tarsal joint twice as long as the second. 

 Sides of thorax strongly rounded behind the middle; elytral striae feebly 

 impressed gry|>i«lioi<les. 



