416 PROCEEDINGS OF THE NATIONAL MUSEU]\1 vol. in 



by designating the older of the two originally included species, Aethus 

 nigerrimus Dallas (1851), as genotype.^ 



Diagnosis. — The free, foliaceous, truncated auricle with the osteole 

 opening ventrally at its base (fig. 95) marks the species of this genus 

 from all others in the Western Hemisphere. 



Description. — Large, elongate-oval, widest posterior to mid- 

 length; dorsum wealdy convex in male, more strongly so in female, 

 venter strongly convex. 



Head: Width less than twice length; surface flattened or noticeably 

 convex; juga as long as or longer than clypeus and contiguous beyond 

 it; anterior outline forming a flattened semicircle, with marginal 

 dorsal carina and complete (including clypeus) submarginal row of 

 coarse, setigerous punctures giving rise to long and short tapering 

 cilia (no blunt, peglike cilia except by breakage of the others) ; eyes 

 large, entire, little projecting; ocelli well-developed, small, situated 

 posterior to a line connecting hind margins of eyes, separated from 

 eyes by more than twice an ocellar width; antennae 5-segmented, 

 II shortest, V longest; bucculae very high, reaching almost to base of 

 head, terminated abruptly posteriorly; labium reaching between 

 middle coxae, II or III longest, I usually shortest, II compressed but 

 without a foliaceous, semicircular lobe (fig. 31). 



Pronotum: Length half or more of width; widest at or distinctly 

 in front of base; sides more abruptly incurved near apical third, 

 carinate, with submarginal row of 8 to 12 setigerous punctures; 

 anterior margin moderately to deeply emarginate; posterior margin 

 slightly convex; transverse impression weak to absent, median or 

 postmedian in position ; surface with few fine or several coarse punc- 

 tures. 



Scutellum: Triangular, width versus length variable; apex nar- 

 rowed, width about half length of membranal suture; disc impunctate 

 or with coarse, sunken punctures. 



Ilemelytron: Corial area well defined; exocorium and usually 

 mesocorium with numerous distinct punctures; costa with 1 to 3 

 setigerous punctures; membranal suture nearly straight, lateral angle 

 rectangular; membrane dark brown to blackish, much less than half 

 of hemelytral length. 



Propleuron: Polished, weakly to coarsely punctured; prosternal 

 carinae low but distinct; anterior margin expanded either side of 

 middle. 



' Signoret's species is African. Since it apparently fits In no described genus, it requires the erection of a 

 new genus: Pseudonalips, new genus (genotype, Onalips cribratus Signoret, 1881b, p. 324). This new genus 

 is easily recognized as a member of the Cydninae by the trichobothrial arrangement, and it separates from 

 all other genera of the subfamily by the nature of the apex of the peritreme, which is undifferentiated but 

 outlined posteriorly and laterally by the expanded and curved posterosubaplcal process (flg. 112). 



