24 THE CANADIAN ENTOMOLOGIST. 



12. Wings : very dark brown, face produced nigcrrima, Lw. 



Wings : veins reddish, face rounded, front broad pi/osus, Day. 



13. First antennal joint less than twice the length of the second ...... 14. 



First antennal joint twice the length of the third or longer 24. 



14. Scutellum largely yellowish 15. 



Scutellum black or marked with yellow 18. 



15. Pleura c^ yellow; thorax 9 with yellow vittse irivittata, Say. 



Pleura $ black ; thorax 9 not vittate ....16. 



16. Abdomen wholly green Aldrichii, Johns. 



Abdomen with black marks 17. 



17. Antennae, front and vertex red hydroleonoides, Johns. 



Antennce, front and vertex black veriebrata, Say. 



1 8. Scutellum laterally green Texasiana, Johns. 



Scutellum apically green 19. 



19. Abdomen $ ? with wide dorsal line, usually narrower in ^ than in 



^ 20. 



Abdomen $ black with transverse markings.. $ with dorsal 



line i?iterrupta, Oliv. 



Abdomen A $ with transverse or triangular markings .23. 



20. Third antennal joint sharply pointed ; front yellow .21. 



Third antennal joint bluntly pointed ; front shining black 22. 



21. Abdomen brown-black, with wide continuous lateral margin; 



scutellum ? yellow microstovia, L^. 



Abdomen with irregular median black stripe pilimaiia, Lw, 



22. Pile of thorax whitish ; median black stripe of abdomen 



straight Americana, Day. 



Pile of thorax yellow ; median black stripe notched on the 



sides virgo, Wied, 



23. Femora yellow ; abdominal marks usually triangular, .pubescens, Day. 

 Femora black \ abdominal marks transverse hoodiana, Big. 



24. First and second joints of the antennae black 25. 



First and second joints red 26. 



25. Front and vertex wide, lateral thoracic stripe 



continuous hierogiyphica, Oliv. 



Front and vertex narrow ; lateral thoracic stripe abbreviated 

 anteriorly siinilis, Johns. 



26. Fyes pubescent ; scutellum of 9 yellow 27. 



Eyes glabrous ; scutellum black, with yellow margin. ^cr/^/Va/Zi, Johns. 



27. Abdomen ^ broad, with narrow markings, pilose obscura, Oliv. 



Abdomen ^ narrow, with wide markings, pubescent. _/?az'/V<7r«/j, Oliv, 



(To be continued. ) 



