208 MEMOIRS ON THE COLEOPTERA 



less broadly and very moderately rounded sides, the latter generally 

 feebly sinuate before the acute and prominent basal angles, the 

 punctures rather close, varying much in size, the surface moderately 

 tumid medially and subposteriorly, the basal slope moderate; elytra 

 about one-half longer than wide, a little more than one-half wider than 

 the prothorax and two and one-half times as long, subevenly oval, 

 though very slightly widest behind the middle. Length 18.0 mm.; 

 width 8.3-9.6 mm. Southern California (probably at some point in 

 the Colorado Desert), Dunn adumbrata n. sp. 



Form more slender than in adumbrata and less cuneiform than in occidta, 

 piceous-black throughout, alutaceous, the elytra slightly shining; 

 head well impressed, coarsely and sparsely punctate; prothorax 

 parallel, with rather arcuate sides and very acute prominent apical 

 angles, the deeply sinuate apex slightly narrower than the base; sur- 

 face very strongly, transversely tumid near basal third, very abruptly, 

 strongly, almost vertically reflexed at the sides, the punctures rather 

 small and well separated, the interspaces very minutely, closely and 

 unevenly punctulate; elytra (c?) three-fifths longer than wide, nearly 

 four-fifths wider behind the middle than at base and three-fifths 

 wider than the prothorax, the sides very evenly arcuate, the apical 

 lobe very large and broad but not well defined; surface nearly as 

 in adumbrata; abdomen rather closely and strongly, asperately punc- 

 tulate; legs long, the tarsi longer than in any other species, the pos- 

 terior three-fifths as long as the tibia, with the basal joint half as 

 long as the median line of the prothorax. Length (cf) 17.5 mm.; 

 width 8.0 mm. California (without indication of locality or col- 

 lector) tarsalis n. sp. 



Form more slender and more cuneiform, more shining, rufo-ferruginous 

 in color throughout possibly to some extent from immaturity; 

 head rather strongly, transversely impressed and centrally pitted, 

 the punctures rather coarser than usual, deep, moderately close-set; 

 prothorax relatively much smaller than in the preceding, about a 

 fifth wider than long, apparently even a little wider at apex than at 

 base, the basal angles prominent, the sides broadly and feebly arcu- 

 ate, sinuate basally, the surface nearly as in the preceding; elytra 

 three-fifths longer than wide, subcuneiform, decidedly wider well 

 behind the middle than elsewhere, the sides thence subevenly con- 

 verging and feebly arcuate to the base, the short sublateral carinule 

 represented by a series of small and widely separated tubercles, 

 these being never more than very feebly developed in adumbrata; 

 apical slope very steep, the lobe short but abrupt. Length 15.5 

 mm.; width posteriorly 7.8 mm. Arizona occulta n. sp. 



8 Body small in size and notably ventricose, black; head and pronotum 

 dull, the former rather feebly impressed transversely and at the 

 middle of the vertex, the punctures moderately large, well separated; 

 prothorax small, about a fifth wider than the median length, the 

 apex almost as wide as the base, elliptically and only moderately 

 deeply sinuate, the angles moderately advanced and acute; sides 

 rather feebly, subevenly arcuate throughout but becoming sinuate 



