2n. 



Genus Chiloolacxui 'I'horne, 1937 

 (Key to species froii' Allen, 19^0) 



1. Cephalic probolae low, rounded at axils 2 



Cephalic probolae pointed at axils 5 



2. Labial probolae bifurcate, branches bifurcate 3 



Labial probolae bifurcate, branches not bifurcate Ii 



3. Branches of labial probolae obscurely bifurcate 



demani (Thome, 1925) Thome, 1937 



Branches of labial probolae distinctly bifurcate, inner branches 

 almost meeting incurvis (Thome, 1925) Thorne, 1937 



1|. Submedian labial probolae asymmetrical 



propinquus (de Plan, 1921) Thorne, l:^'3j 



Labial probolae symmetrical (genotype) 

 s}TTimetricu3 (Thorne, 192b>) Thorne, 1937 



5. Labial probolae low, truncate, not bifurcate 



truncatus (Thorne, 1925) Thome, 1937 



Labial probolae bifurcate 6 



6. Labial probolae bifurcate, branches bifurcate 



trifurcatus (Thome, 1925) Thome, 1937 



Labial probolae bifurcate, branches not bifurcate 7 



7. Wing area with i; lines. . . quardricarinatus (Thome, 1925) Thome, 1937 

 Wing area with 2 or 3 lines 8 



3. Submedian labial probolae asymmetrical. . . . trilineatus Steiner, 19U0 

 Submedian labial probolae symmetrical 9 



9. Labial probolae bifurcate 1/3 their length 



bisexualis (Micol., 1916) Thome, 1937 



Labial probolae bifurcate 1/2 their length. . . 10 



10. Labial probolae short, 2 lines in lateral fields 



denticulatus (Thome, 1925) Thorne, 1937 



Labial probolae moderately long, 3 lines in lateral fields 

 lentus (Maupas, 1900) Thome, 1937 



Others: C. obtusicaudatus (Kreis, 1930) Thome, 1937 



