382 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iii 



Genus Rhytidoporus Uhler, new status 



Aethus of authors, nee Dallas, 1851, p. 110. 



Rhytidoporus Uhler, 1877, p. 380. 



Cryptoponis Uhler, 1877, p. 381, nee Motschulsky (1858) in Coleoptera. New 



synonymy. 

 Bergthora Kirkaldy, 1904, p. 280. New synonymy. 

 Findalia Jensen-Haarup, 1926, p. 51. New synonymy. 



Diagnosis. — The narrow, shining bandUke extension of the peri- 

 treme which interrupts the metapleural evaporatorium anteriorly (figs. 

 92-94) will separate the members of this genus from all others in the 

 Western Hemisphere. 



Description. — Small; length of body, 3.5-6.0; oval, widest approxi- 

 mately at or slightly posterior to middle; dorsum much less convex 

 than venter. 



Head: Length nearly two-thirds width, flattened or slightly convex 

 above; juga as long as clypeus; juga with fine marginal carina dorsally, 

 either with complete (including apex of clypeus) row of submarginal 

 punctures with their setae becoming finer towards eye, or with one 

 preocular seta and one half way to apex; eyes large, but slightly pro- 

 jecting; ocelli absent or well developed, when present located on or 

 slightly behind a line connecting hind margins of eyes and separated 

 from eyes by not more than twice transverse ocellar width ; antennae 

 5-segmcnted, I shortest, II slightly shorter or equal to III, latter 

 subequal to or shorter than IV which may be almost as long as V; 

 bucculae moderately high, reaching nearly to base of head; labium 

 reaching between middle coxae (lucida?), IV shortest, II longest, 

 III shorter than I, II slightly compressed but without foliaceous lobe. 



Pronotum: Length about half width, distinctly narrowed from base; 

 side margins carinate, straight or convex on basal two-thirds or more, 

 with 4 to 8 or about 20 setigerous punctures submarginally; anterior 

 margin shallowly to deeply emarginate; transverse impression weak 

 to absent, usually marked by a row of distinct punctures; posterior 

 margin broadly but slightly convex, all angles rounded. 



Scutellum: Shorter than, equal to, or longer than width, triangular, 

 apex narrowed and less than or slightly wider than half of membranal 

 suture; disc with distinct punctures. 



Hemelytron: Areas wealdy or well defined, membranal suture 

 straight or slightly projecting laterally; costa with 1 or 2, or about 

 15 to 20 setigerous punctures; membrane not over two-fifths of 

 hemelytral length, usually reaching or slightly surpassing apex of 

 abdomen, hyaline and faintly clouded with brown. 



Propleuron: Moderately convex anterior to depression, latter w^th 

 or without coarse punctures; prosternal carinae low, rather sharp; 

 anterior margin shglitly lobulate either side of middle. 



