Here is an interesting article I found. Also heres another interesting info on this site too. http://www.ento.psu.edu/extension/fa...cal_cicada.htm
Introduction
Flyfishers are accustomed to organizing their sport around seasonal or annual events. Spring is mayfly season, with a logical progression from Baetis to Sulphurs to Green Drakes. Summer is Trico and terrestrial time, and trout spawn in autumn. These cyclical rhythms are a much anticipated, almost predictable part of fly fishing on which anglers depend for much of their success.Only once in a great while does an event unfold that breaks the mold. The year 2008 will bring such a happening�the emergence of Brood XIV of the periodical cicada. This month-long caloric bonanza tempts not only lunker trout to the top but also smallmouth and carp. It is a hatch to be planned for and eagerly anticipated.
Entomological Background
Like aquatic insects it pays to know a bit about the life cycle and behavior of terrestrial insects like cicadas. Often and incorrectly referred to as 17-year locusts, there are cicadas with both 17- and 13-year life cycles. Cicadas with the longer life cycle are the three northern species, while the three southern species have 13-year lives. There is some overlap in their distribution.The last major Pennsylvania periodical cicada emergence was Brood X in 2004. Brood X touched Central PA in the Juniata River drainage, but its prime area of importance was generally south and east of Harrisburg. Brood XIV will impact primarily central and north central Pennsylvania. In fact, this year should see them on Spring, Penn�s, and Fishing Creeks, the Little Juniata River, and the numerous freestoners to our north.Cicada nymphs live in the ground for almost sixteen years and eleven months. In late May or early June, the nymphs emerge from the ground and ascend vegetation to split their shucks and emerge. The appearance of the shed skins on trees, bushes, and weeds is the first sign that cicadas are in the area.Areas of heavy infestation can also be identified by sound. The males sing to notify females of their presence and attract them, and by simply driving or walking along area streams, you can hear where they are heavy. On warm afternoons when they are most active, the noise can be extremely annoying. These places are, of course, the best places to fish.Adult cicadas are strong but clumsy fliers and frequently wind up on the water, even at midstream on larger rivers like Penn�s Creek and the Little J. Like other terrestrials cicadas also fall into the water or are blown into it by strong winds. Top fishing strategies include patrolling the banks and pitching casts tight to them and under bushes and riparian trees, just like when you fish ants and beetles. Rises to these large insects are showy, and it is not difficult to spot fishing eating cicadas. After mating the females lay hundreds of eggs in twigs. The tiny nymphs hatch in August and enter the ground, where they suck juices from plant roots for the next seventeen years. The adults are not so lucky, and by Independence Day, the woods fall silent again, the adults having served their sole purpose, reproduction.