470 WILLIAM G. DIETZ, M.D. 



]?I. COllgeuialis n. sp. — Differs from the last species as follows : Less robust ; 

 antennae inserted just before the middle (%); orbital margin only slightly ele- 

 vated, front not concave between the eyes; prothorax more than one-half wider 

 than long, anterior cusps much smaller, very acute and a little more remote. 

 Elytra one-third wider at the base than the prothorax, somewhat shining, very 

 thinly clothed with very small scales without metallic lustre, conspicuously mot- 

 tled with spots of white scales, a short scutellar line of dark, velvety scales, strife 

 well impressed, distinctly and closely punctured, interspaces convex, punctulate, 

 without acute granules ; underside of body more densely clothed with grayish 

 white scales, femora more densely scaly, obscurely annulate. Length 2.25 mm. ; 

 0.09 inch. 



% . Apical half of last ventral segment with a well defined, transversely oval, 

 glabrous fovea. 



Hub. — Oregon . 



A unique specimen in Nat. Mus. coll. Might readily be con- 

 founded with ceneosqaamosiis, with which, indeed, I had confounded 

 it, but for the difference in the sexual characters of the male. The 

 elytra are more shining, not densely scaly and distinctly mottled 

 with spots of white scales. 



M. scoliasus n. sp. — Oval elliptic, convex, black, antennsp and legs rufous, 

 infuscate; above rather densely clothed with dirty gray scales, variable in size, 

 underside clothed with small oval scales, not at all crowded except on the meso- 

 sternum and the last ventral segment. Beak a little longer than the bead, feebly 

 curved, a little wider towards the apex, separated from the head by an impression, 

 densely punctured, subcarinate in its apical half. Head densely punctured, feebly 

 concave between the eyes, the latter slightly convex ; antennae stout, insei-ted 

 immediately before the middle ( % ), first joint of funicle robust, joints 2-3 not 

 elongate ; prothorax nearly one-half wider than long, oue-third wider at the base 

 than at the apex, widest at the base, sides straight and slightly convergent for 

 three-fifths their length, rather suddenly rounded in front and feebly constricted 

 at the apex, lateral tubercles large, very acute, anterior cusps nearly as large as 

 the tubercles, not widely separated, dorsal sulcus broad, ill-defined posteriorly, 

 widening and more sharply defined in front by ridges extending to the summit 

 of the anterior cusps, disc closely and rather coarsely punctured, sides densely 

 squamose ; scutel very minute. Elytra oval, one-third wider at the base than 

 the prothorax, rounded on the sides, stria; rather wide, well impressed, closely 

 and coarsely punctured, more or less concealed by the scales, interspaces rather 

 convex, finely rugose, outer interspaces with a row of small, setiferous granules, 

 a common sutural spot of pale scales near the base; pygidium densely and finely 

 punctured ; ante-coxal ridges not sharply defined. Legs slender, femora infuscate 

 about the middle, tarsi slender, third joint scarcely one-half wider than the 

 second, fourth joint nearly as long as the two preceding joints together, claws 

 divergent. Length 2.0 mm. ; 0.08 inch. 



% . Cannot discover any sexual characters on the ventral surface. 



Hab. — Wyoming. 



Two male specimens in Dr. Horn's coll. At once recognized by 

 the cons})icuous, pale sutural spot. 



