106 U.S. NATIONAL MUSEUM BULLETIN 261 



thoracic carinae, and a broader anteapical smoky band which includes 

 the apical portions of the anteapical cells. It is also very close to P. 

 dufouri (Signoret) and P. appendiculata Schmidt in the structure of the 

 female abdominal sternum VII, from both of which it can be separated 

 by the characters of the aedeagus (see figs. 93 and 98). The median lobe 

 of the abdominal sternum VII of the female is convex in P. sculptilis; 

 truncate in P. irenae. 



19. PROCOISOSAMA, new genus 



Figures 99-104 



Type-species : Aulacizes alalia Distant. 



Length 11-14.5 mm. 



Head strongly produced, anterior margin very slighdy elevated and 

 carinate, ocelli located on 'or slightly behind a line between anterior 

 angles of eyes, surface finely pubescent; antennal ledges not foveate, 

 carinate dorsally in lateral aspect, with anterior margins steeply 

 declivous or not; otherwise as in Aulacizes. 



Thorax with pronotal width greater than transocular width of head, 

 lateral margins convergent anteriorly, posterior portion of surface 

 transversely rugose or rugose and punctate, surface without pubescence, 

 with complete dorsopleural carinae which are arched ventrally; other- 

 wise as in Aulacizes. Forewing with membrane present and distinctly 

 delimited or not from remainder of wing, veins usually elevated and 

 distinct, clavus and corium opaque, usually without a discal anteapical 

 plexus of veins; otherwise as in Aulacizes. Hindwing and hindlegs as in 

 Aulacizes. 



Male genitalia: Pygofer not strongly produced, apex rounded or 

 angulate, with numerous dispersed microsetae, with a process arising 

 preapically on dorsal margin and extending ventrally, acute or branched 

 at apex. Plates separate throughout their length, extending posteriorly 

 slightly farther than pygofer apex, triangular, with numerous dispersed 

 microsetae. St>'le extending posteriorly farther than apex of connective, 

 with or without distinct preapical lobe, truncate, acute, or rounded 

 apically. Connective Y-shaped, with arms not widely divergent, the 

 stem gradually widened apically, not keeled. Aedeagus symmetrical, 

 shape variable interspecifically, with or without processes. Paraphyses 

 absent. 



Female abdominal sternum VII much broader than long, apical 

 margin variable interspecifically. 



Species of this genus are known from Colombia, Ecuador, Peru, and 

 Bolivia. Proconosama is related to Aulacizes, from which it can be dis- 



