. Fig. 1. — Distribution of periodical cicadiis in Illinois. The two upper enclosed areas show the locations of the lowan Brood (Marlatt's III), and the two lower enclosed indicate the locations of the Lower Mississippi River Valley Brood (Marlatt's XXIII). Black dots indicate posi- tive records of adult specimens, skins, holes in the ground, flagging tree branches, or singing. Circles indicate negative records in areas carefully searched.

---

Size: 1669px × 2994px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookpublisherurban, booksubjectperiodicalcicada