140 PROCEEDINGS OF THE NATIONAL MUSEUM 



following the key below are arranged in alphabetical order of the 

 specific names. 



Key to the Species of Pyractonema 



1. Elytra uniformly black or dark brown 2 



Elytra with pale borders 10 



2. Abdominal sternites black or dark brown, except rudimentary luminous 



organs 4 



Abdominal sternites either completely or in part red or rarely yellow or 

 white 3 



3. Eighth abdominal sternite red, rarely yellow or white; 10 to 19 mm. long. 



Pyractonema haemorrhoa (Fairmaire and Germain) 

 All abdominal sternites red; elytra attenuate; 5.0 mm. long (not seen). 



Pyractonema subulipennis (Fairmaire and Germain) 



4. Pronotum with two subrectangular or reniform red spots (these occasionally 



yellow) surrounded by wide black borders and vitta (Pyractonema nigri- 



pennis group) 5 



Pronotal pigmentation otherwise 6 



5. 14 to 19.5 mm. long, or to 24 mm. in females. 



Pyractonema nigripennis Solier 

 10 to 15 mm. long. . Pyractonema bifenestrata (Fairmaire and Germain) 

 5 to 11 mm. long Pyractonema obscura (G. A. Olivier) 



6. Pronotum yellow or red with irregular black markings; parallel; body less 



depressed than in most species; 9 to 12 mm. long. 



Pyractonema vicina Solier 

 Pronotum reddish on disc 7 



7. Pronotum with lateral and apical borders colorless and translucent, or with a 



very narrow light brown border which is usually incomplete; narrow, 

 parallel outline; 6.5 to 10 mm. long. 



Pyractonema angustata new species 



Pronotum with lateral and apical borders at least in part dark brown or 



black 8 



8. Pronotum orange-red or yellow in basal two-thirds; translucent apically; 



no median vitta; widest in apical third; insects very small and narrow; 3.5 



to 5.0 mm. long Pyractonema minor new species 



Pronotum coral-red, or pink to red 9 



9. Pronotum mainly red; narrow borders and usually incomplete median vitta, 



black; outline long-elliptical; 7.5 to 12 mm. long. 



Pyractomena latior new species 

 Pronotum opaque coral-red, with narrow black border and rarely a very 

 narrow black median vitta; outline parallel; 4 to 12 mm. long. 



Pyractonema rhododera Solier 

 10. Large insects, 11.5 to 18 mm. long; elytra with lateral and apical borders 



yellow Pyractonema depressicornis Gemminger and Harold 



Smaller insects 7 to 11 mm. long; elytra with lateral and apical borders 

 white Pyractonema albomarginata Solier 



