CHARLES W. HOOKER. 109 



10. Abdomen black, with median transverse band of some other 



color 11. 



Abdomen more or less black, without median transverse band of 

 some other color 12. 



11. Abdomen with median transverse band of lemon-yellow. 



laticiiictus Cress. 

 Abdomen with median transverse band of ferruginous. 



zonatus Szep. 



12. Thorax and abdomen entirely black morio Fabr. 



Thorax and first abdominal segment ferruginous. 



ferrugineus n. sp. 



13. Abdomen flavous or flavo-ferruginous, marked with black 14. 



Abdomen black or mostly black 15. 



14. Metathorax very finely reticulate ornatipennis Cress. 



Metathorax coarsely reticulate elegans Cress. 



15. Thorax partly or entirely fulvous to ferruginous 16. 



Thorax entirely black 18. 



16. Flagellum of antennae black 17. 



Flagellum of antennae fulvous snowi Vier. 



17. Wings fulvo-hyaline, apex black spectabilis Party. 



Wings hyaline with radial, submarginal and part of the second 



apical cells black grenaclensis Ashm. 



18. Antennae with flagellum black 19. 



Antennae with flagellum fulvous or orange-fulvous 11. 



19. Wings black, with a purplish reflection and a hyaline spot in the 



discocubital and discoidal cells iiiaculipennis Cress. 



Wings entirely flavo- or fulvo-ferruginous 20. 



20. Face strongly rugose niarg-inipennis Br. 



Face punctate, not rugose flamiiiipennis Ashm. 



21. Abdomen black, with median transverse band of ferruginous. 



ternaldi n. sp. 



22. Face and legs more or less fulvous... niorio transversalis Vier. 

 Face and legs shining black 23. 



23. Antennae orange-fulvous, mesopleurae punctured ....niorio Fabr. 

 Antennae red, mesopleurae not punctured. ...erythrocerus Cam. 



Tliyreodon niger Cress. 



Thyreodon niger Cresson, Proc. Acad. Nat. Sci. Phila., p. 375, 



n. 1, 9 c? 1873. 



" " Cameron, Biol. Centr. Amer., Hym., I, p. 288, 



pi. 12, fig. 12 1886. 



Dalla Torre, Cat. Hym., Ill, p. 186 1901. 



" " Szepligeti, Gen. Ins., Hym., 34me Pasc, p. 25, 



n. 17 1905. 



TRANS. AM. ENT. SOC, XXXVIII. 



