H. ('. FALL 



179 



length to the fifth in both sexes. Legs rather slender, the front femora some- 

 what stouter, as is usual in t his part of the genus. 



Male. — Front tibiae with an acute tooth just beyond the middle. 



Female. — Front tibiae not toothed. 



Length 1.5-1.7 mm. 



Hub. — Wyoming (National Park). A short series taken by 

 Hubbard and Schwarz. 



M. alberta sp. nov. — Moderately elongate-oval, ru fotestaceoas, the outer 

 joints of antennae, elytral suture, metasternura and last joint of tarsi more or 

 less darker or infuseate; pubescence moderate, subrecumbent. Antenna' barely 

 reaching the hind angles of the pronotum, proportioned much as usual, joints 8 

 and 10 slightly longer than wide, all other distinctly so. Head sparsely punc- 

 tate; eyes moderately large, distant on the front by scarcely more than twice 

 their longest diameter: tempo ra short but distinct. Prothorax a little wider than 

 the head, and about three- fifths as wide as the elytra; transverse, sides moder- 

 ately rounded, slightly more strongly so anteriorly; indistinctly subcrenulate; 

 bind angles marked by a not very conspicuous denticle; surface moderately 

 punctate, distinctly foveate before the base. Elytra ovate, widest before the 

 middle, thence nearly straight. and convergent to just hefore the apex, humeri 

 plainly exposed, apex distinctly truncate; strife a little impressed and rather 

 strongly punctate, intervals more finely punctate in series. Beneath sparsely, 

 indistinctly punctate, the mesosternum and sides of metasternum more evidently 

 so; metasternal episterua impunctate or nearly so. Metasternum distinctly 

 longer between the coxae than the post-coxal portion of the first ventral segment ; 

 middle coxae separated by scarcely half the coxal width. Legs rather slender, 

 but apparently a trifle stouter in the male. 



Mule. — Front tibia? toothed as usual slightly beyond the middle. 



Female. — Front tibia; not toothed. 



Length 1.7-1.8 mm. 



Hab. — Alberta (Banff Springs). Six examples — collection of 

 Hubbard and Schwarz. 



In form of elytra this species approaches longipennis, though the 

 peculiarity of form is here not so strongly marked. It differs by its 

 narrower prothorax, its color, the longer metasternum and its nor- 

 mal ventral formation. 



M. longipeiiuis Lee. — Elongate-oval, uniformly pale yellowish testaceous; 

 pubescence short, recumbent. Head sparsely, rather finely punctate, front more 

 than twice as wide as the longest diameter of the eye; eyes prominent, but 

 rather small, tempo ra short but evident; antenna? about as usual. Prothorax 

 broad, more sparsely and finely punctate than in allied forms, basal fovea a little 

 transverse and somewhat shallow; sides rather strongly rounded, margins 

 scarcely visibly crenulate. hind angles with a prominent denticle. Elytra elon- 

 gate, sides convergent and straight, or even a little sinuate posteriorly; apex 

 broadly truncate. Metasternum shorter between the coxa? than the post-coxal 

 length of the first ventral. Middle cox* separated by less than half the coxal 

 width. (PI. V, fig. 69). 



Male. — Front tibise dentate internally near the middle; abdomen projecting 

 more noticeably beyond the elytra, ventral segments in one plane ; femora stouter. 



TBA.N8. AM. ENT. SOC. XXVI. DECKMBKR, 1899. 



