H. C. FALL. 



25 



Prothorax strongly convex, beak longer and more arcuate, elytra 

 faintly bluish, moderately shining, intervals narrow, convex. 



convexicollis. 

 Prothorax normally convex, beak less strongly arcuate, color black, 

 lustre dull, elytral intervals flatter and more rugose. 



austera. 



Prothoracic punctures more or less longitudinally confluent, 



elytra with dark blue or greenish lustre var. siibstrif^-a. 



Subgroup gentilis. 

 Femoral tooth obtuse, rudimentary, antennae (c?) inserted very slightly 

 behind the middle of the beak, second funicular joint much 



less than twice as long as wide vitiosa. 



Femoral tooth acute, well developed, 



Elytral striae lightly or scarcely impressed, the intervals nearly 

 flat. 

 Beak in cf fully as long as, and in the 9 distinctly longer than 



the prothorax gentilis. 



Beak in cf evidently shorter than, and in the 9 subequal in 

 length to the prothorax ; eyes a little less distant ; entirely 



black, surface duller and more rugose proxiiiia. 



Elytral striae rather strongly impressed, the intervals distinctly 

 convex striata. 



Subgroup alutacea. 



Black, opaque, head rather sparsely punctate ; antennae ( 9 ) inserted 

 at the middle of the beak, funicle more slender.. .alutacea. 



Reddish-brown, opaque, head very densely punctured, antennae (9 ) 

 inserted distinctly beyond the middle of the beak, funicle 

 stout imbellis. 



M. cuneforniis Horn. 



The type of this species is from Nebraska and is in the 

 Ulke Collection. At the time of its description by Horn no 

 other specimens were known, but there are now in his collec- 

 tion examples from Colorado, Montana and Washington. 

 Snow records it from New Mexico, and my own specimens 

 were taken in the San Bernardino Mountains of California. 

 Horn merely says in his description " surface blue," but in 

 all examples known to me (I have not seen the type) the 

 prothorax is nearly or quite black, the elytra dark blue. It 

 is worthy of remark that in all the specimens examined the 



TRANS. AM. ENT. SOC, XXXIX. (4) 



