i 4 M. W. NIELSON 



Genus CHILELANA DeLong 



(Text-figs 1-12) 



Chilelana DeLong, 1969 : 462. Type-species: Chilelana artigasi DeLong, by orginal 

 designation and monotypy (DeLong, 1969 : 462). 



Small, brachypterous or subbrachypterous species, with male well marked with ivory to 

 orange and black markings on elytra, female similarly marked but sometimes uniformly 

 stramineous. 



Head narrower than pronotum, produced well beyond proximal margin of eyes; crown 

 broad apically, tapered basally, disk elevated; eyes large, slightly bulbous laterally; pronotum 

 short with anterior margin overlapping base of elytra, lateral carina dorsad of costal margin 

 of elytra; elytra with obscure venation, sometimes extra cross veins, five apical cells and three 

 anteapical cells, middle cell open basally; hind wings small, possibly non-functional in 

 brachypterous morphs, well developed in subbrachypterous morphs; clypeus long without 

 median longitudinal carina; clypellus extending beyond genae. 



Male genitalia symmetrical; pygofer with short caudodorsal projection and membranous 

 projection about middle of caudal margin; aedeagus broad basally, apical two-thirds long, 

 filamentous, semicircular in lateral aspect, articulated basally with apex of connective; 

 gonopore apical; connective Y-shaped, stem not lying in same plane as arms, curved ventrally; 

 dorsal apodeme simple, slender plate, attached by membrane; style long with subapical 

 projection; plates long, broad apically, appressed laterally. 



Female seventh segment broadly concave on posterior margin. 



Chilelana can be separated from Tinobregmus by having a long semicircular 

 aedeagus and broad plates. It is at present known from Chile and Bolivia. 



Chilelana artigasi DeLong 

 (Text-figs 1-12) 



Chilelana artigasi DeLong, 1969 : 462. Holotype g, Chile (OSU, Colombus) [examined]. 



Length: brachypterous morph, $ 3-10—3-80 mm, °- 4-60—5-10 mm; subbrachypterous morph, 

 £ 4-50-5-00 mm, $ 5-20—6-20 mm. 



Colour as in generic description. 



Brachypterous morph with short crown, anterior margin blunt and rounded; subbrachypterous 

 morph with crown elongate, anterior margin more sharply produced ; elytra with base concealed 

 by anterior margin of pronotum in sexes of both forms; abdomen with terminal segments 

 exposed in brachypterous ty; tenth segment and sometimes plates exposed in brachypterous 

 tj; pygofer with terminus sometimes exposed in subbrachypterous °- 



Male genitalia symmetrical; pygofer in lateral aspect with prominent, short, sclerotized 

 projection caudodorsally and small, short, concealed membranous projection caudoventrally; 

 aedeagus broad basally, articulated basally with apex of connective, arising ventrad of arms 

 of connective, apical two-thirds narrow, tube-like, semicircular in lateral aspect; gonopore 

 terminal; style in dorsal aspect long, with subapical projection on inner lateral margin, apical 

 one-quarter very narrow; connective Y-shaped in dorsal aspect, stem curved ventrad in 

 lateral aspect; plate in lateral aspect long, broad apically. 



Female seventh sternum with posterior margin broadly concave. 



Distribution. Chile, Bolivia (new record). 



Specimens examined. 



Chilelana artigasi DeLong, holotype £, Chile: Provincia Concepcion Camina a 



