CUTWORMS, ARMYWORMS, AND RELATED SPECIES 5 



15. Setigerous tubercles of abdominal segments conspicuous, large, fuscous. 



Seta IV set in upper edge of tubercle. Tubercle V very large, much 



larger than tubercle IV (fig. 5, A). March Orthodes incincta (Morr.) 



Setigerous tubercles of abdominal segments small. Seta IV set in center 

 of tubercle. Tubercle V normal and about the same size as tubercle IV. 

 March Lacinipolia meditata (Grote) 



16. Each mandible with 4 or 5 distinct teeth 17 



Each mandible with but 3 distinct teeth, 2 obscure teeth, or about 12 



small teeth, or toothless 26 



17. Line joining setae III and V on seventh abdominal segment passing dis- 



tinctly anterior to spiracle (fig. 5, B). June _ _ Protoleucania albilinea (Hbn.) 

 Line joining setae III and V on seventh abdominal segment passing 

 through, or posterior to spiracle (fig. 5, C, D) 18 



18. Seta Oi on or anterior to a line connecting centers of ocelli IV and VI 



(fig. 6, A) ----- 19 



Seta Oi posterior to a line connecting centers of ocelli IV and VI (fig. 6, 

 B)i 20 



19. Reticulation of head dark. Adfrontal areas not white. August-Sep- 



tember Laphygma exigua (Hbn.) 



Forepart of head deep fuscous or black. Reticulation obsolete on fore- 

 part of head. Obscure reticulation laterally. Adfrontal area con- 

 spicuous white (fig. 1, F). June-July Prodenia ornithogalli Guen. 



20. Spiracles entirely black, or with central area dark brown 21 



Spiracles with dark rims, central area pale, or light brown 23 



21. Dorsum with a segmental series of definite markings. Reticulation of 



head fuscous or ferruginous, or fuscous coloring limited to submedian 



arcs, and ocellar region 22 



Dorsum with no markings except pale median line. No reticulation 

 on head. Fuscous coloring limited to a lateral stripe passing 

 through ocelli. May-July Papaipema nebris (Guen.) 



22. Subdorsal black markings linear. Distinct middorsal yellow spot on 



each abdominal segment, at least anteriorly. May-June. 



Peridroma margaritosa (Haw.) 



Subdorsal black markings wedge-shaped. April Anicla badinodis (Grote) 



Dorsal area of abdomen bearing a series of shield-shaped, deeply infus- 

 cated brown spots, with their apices directed posteriorly. April. 



Rusina bicolorago (Guen.) 



23. With distinct black spots above spiracles. April. 



Spaelotis clandestina (Harr.) 

 No distinct black spots above spiracles 24 



24. With wedge-shaped subdorsal black spots, at least posteriorly. April. 



Amathes c-nigrum (L.) 

 No subdorsal black spots 25 



25. Claws of legs with base broadly rounded (fig. 4, V). A distinct pale sub- 



spiracular stripe _ _ ^ Di pterygia scabriuscula (L.) 



Claws of legs with base acutely angulate (fig. 4, W). No distinct sub- 

 spiracular stripe Septis cariosa (Guen.) 



26. Spiracles entirely black. May- June, September Cirphis unipuncta (Haw.) 



Spiracles pale with dark rims 27 



27. With a dark longitudinal stripe on abdomen through setigerous tubercle 



II. March- April Leucania phragmatidicola (Guen.) 



No dark longitudinal stripe on abdomen through setigerous tubercle II 28 



28. Mandible with 3 distinct teeth 29 



Mandibles with cutting margin straight and toothless, or bearing about 



12 small teeth Anicla infecta (Ochs.) 



29. Prolegs on fourth, fifth, sixth, and anal segments. September. 



Plathypena scabra (F.) 

 Prolegs on fifth, sixth, and anal segments. September. 



Caenurgina erechtea (Cram.) 



