September, 1941 KnicHt: PLant Bucs, or Miripag, oF ILLINoIs 19 
KEY TO SUBFAMILIES 
1. Scutellum with a dorsal projection, Eivesunotestalted stigs.72 0,91 een earn 4 
figs. 137, 181...............-.... 2 4, Eyes rising a considerable distance 
Scutellum without a dorsal projection. 3 above dorsum of head; head deep, 
with a furrow down the meson and 
the ventral margin wide and trun- 
hcoy ate lb, ob. oe Cylapini, p. 61 
Eyes not rising appreciably above 
Gorsu nae ofuheach aan at qe hee eee ae 5 
CLAW 
HAIR-LIKE 
AROL/UM 
SS (YES 
MEMBRANOUS 
AROL/IUM 
PSEUDAROLIA 
ABSENT 
PSEUDAROLIA ABSENT 
| paca 27 
PSEUDAROLIA APPRESSED 
Fig. 19.—Head and body of Lateps hirtus. ee” 
Fig. 20.—Head and pronotum of Hespero- 
phylum heidemanni showing dorsal view of 
antenna at left, anterior flat view at right. 
Fig. 21.—Head of Cylapus tenuicornis: A, 
lateral view; B, dorsal view. 
MIRIDSLEAKSAL CLAWS 
Fig. 23.—Monalocoris filicts. 
Fig. 24.— Largidea davisi. 
Fig. 25.— Diaphnidia pellucida. 
Fig. 26.— Pithanus maerkelit. 
Fig. 27.— Teleorhinus davist. 
Fig. 28.— Dicyphus agilis. 
Fig. 29.— Dicyphus agilis. 
Fig. 22.—Head and pronotum of Semium 5. Pronotum as in fig. 22, with anterior 
hirtum: A, dorsal view; B, lateral view. fourth membranous, remainder vel- 
vety and dark, with a pair of con- 
2. Pronotum with anterior half flat, pos- spicuous, narrow membranous areas 
terior half swollen, fig. 181 (Bar- near anterior margin of dark por- 
beriella, p. 209)... .Capsinae, p. 131 tion; pleural area separated from 
Pronotum with only anterior fifth flat, notum by a suture (Semium, p. 75) 
Pest Homiout-iitissiormingrashioh,  — ¥\ j@oeas-) acaqreawn = Orthotylinae, p. 74 
swollen area, fig. 137 (Cyrtopeltocoris, Pronotum otherwise, without a pair of 
jade, gE) Ree mae Orthotylinae, p. 74 narrow, membranous areas on a vel- 
3. Eyes attached to a stalk formed by a vety area; seldom with a suture 
round lateral projection of head; separating pleural areas and notum. 6 
head very wide and short, fig. 19 6. Antennae with second segment bilater- 
hy SE ee eae a Labopini, p. 81 ally compressed, foliaceous, nearly 
