78 Bulletin Wisconsin Natural History Society [Vol. 12, Nos. 1 & 2 
Insecta 
Anurida maritima (Guerin-Meneville). Abundant on the rock beaches 
between tides. 
Odonata. Several damsel- and dragon-flies were observed flying over 
the rock beaches. Once a damsel-fly was seen to poke its abdomen into 
the ocean as it flew above it (oviposition?). Verrill and Smith (’74) men- 
tion a caddis-fly which lives on piles in the ocean. 
Notonecta glauca. Observed in the pools on rock beaches above high 
tide mark. 
Corixa sp.? Abundant in fresh and brackish water in the pools on 
rock beaches above high tide. Not infrequently found in pools with 
Enteromorpha, Ascophyllum, Mytilus, and dipterous larvae. 
Crane flies (Tijnda? species) were rather common on rock beaches among 
Ascocarpus. 
Dipterous larvae (Chironomids, Culicids, etc.) and pupae were abundant 
in many of the little rock pools above high tide mark. Mosquitoes bred 
in many of these pools and were common on the rock beaches. 
Parydra sp.? An abundant and characteristic resident in the pools 
above high tide on the rock beaches where it bred. The adults mated 
on the surface of the water and often gathered to form rafts several inche.^J 
across. They were frequently met in other zones, where they apparently 
fed. 
A tachinid Fly. Pupa cases were found at the top of the sand beach at 
Station 4. 
Coelopafrigida Falle. This fly was captured while it was walking on the 
surface of a salt pool in Swallow’s Cave, at Station 10. 
Euvanessa antiopa (Linnaeus). This and other butterflies flew along 
the beaches, particularly at Station 1. Several moths were observed on 
the rocks at Station 12. 
A mara chlacea Dej. Collected in the debris at the top of the sand beach, 
Station 4. 
Corymbites medianus Germ. Taken on the rocks at Station 6. 
Lachnosterna sp.? One found in a pool at Station 8. 
Leptinotarsa 10-lineata (Say). Taken at Stations 5 and 10 on the rocks. 
Telephorus carolinus Fabr. One individual taken in a crevice in the 
rock at Station 6. 
Xantholinus obscurus Er. Taken in drift at top of the sand beach at 
Station 4. 
Myrmica laevinodis Nyland. This ant hunted on the rock beaches, 
usually above high tide mark. 
Formica fusca L. On rock beaches. 
Tunicata 
Botryllus schlosseri (Pallas). This ascidian was common on Chondrus 
in the pools in Swallow’s Cave at Station 10. 
