224 MEMOIRS ON THE COLEOPTERA 



becoming unusually rapidly fine, feeble and close-set posteriorly; 

 abdomen feebly but rather closely punctulate. Length ( 9 ) 9.0 mm.; 



width 3.25 mm. Colorado lanatula n. sp. 



Elytra with strong aeneo-cupreous to pure green metallic lustre: third 

 and fourth antennal joints short, subequal and about twice as long 



as wide throughout 9 



Elytra with pure deep greenish-blue to violaceous lustre, except in the 



pale dimorphic form 13 



9 Elytra strongly tapering from base to the rather narrowly rounded 

 apex in both sexes, the habitus nearly as in certain species of Donacia, 

 moderately stout, shining, the elytra aeneo-viridate, the pubescence 

 coarse but not dense, moderate on the elytra, longer and bristling 

 anteriorly; head very densely punctate; antennae thick, extending 

 to apical third of the elytra (c? 1 ); prothorax but slightly shorter than 

 wide, with moderate, deep and rather sparse punctures, strongly 

 narrowed and broadly constricted at apex, the sides obtusely prom- 

 inent before the middle, the smooth median line as usual; elytra 

 one-half wider than the prothorax to less, rather more than three- 

 fourths longer than wide, the deep punctures unusually coarse and 

 widely separated, becoming smaller but strong and well separated 

 apically ; abdomen very feebly, sparsely punctulate and with moderate 

 hairs. Length 8.5-9.5 mm.; width 2.9-3.4 mm - California (San 



Francisco) subaenea Lee. 



Elytra parallel, generally so in both sexes so far as known 10 



10 Elytra cupreous to cupreo-violaceous in lustre, not at all greenish . . 1 1 



Elytra metallic green or greenish in lustre 12 



II Body very stout, moderately convex, shining, the pubescence only 

 moderate in length but very coarse, bristling anteriorly ; head finely, 

 strongly, very densely punctate, with a subimpunctate and striate 

 median line, the sides very feebly converging and nearly straight 

 behind the scarcely prominent eyes; prothorax distinctly wider than 

 long, relatively rather large, broadly constricted but only moderately 

 narrowed at apex, the sides obtusely tumid before the middle, the 

 punctures rather strong and close, becoming very dense laterally, 

 with a smooth median line to slightly before the middle; elytra 

 parallel, very broadly, obtusely rounded at apex, not quite twice as 

 wide as the prothorax, only about three-fifths longer than wide, the 

 perforate punctures not at all coarse but well separated, becoming 

 fine though strong and still about as widely separated apically; 

 one or two narrow impunctate lines are more or less evident except 

 posteriorly; abdomen sparsely but rather strongly punctulate, with 

 short darkish and unusually fine and inconspicuous hairs. Length 

 (9 ) 8.7 mm.; width 3.5 mm. California, Levette. 



corpulenta n. sp. 



Body much narrower, smaller and less convex, the pubescence rather 

 longer, coarse but sparse, bristling anteriorly; head with the punc- 

 tures very fine, deep and, though very close, well defined and not 

 confluent, the median line less punctate, broadly so anteriorly, the 

 stria excessively fine and obsolescent; feebly converging sides very 

 short behind the rather prominent eyes; prothorax much shorter 



