You can tell this is a female by the large size and by the large abdomen probably full of eggs ready to be laid. They create intriguing egg masses which look like red jelly with creamy white tubes. The entire mass measures about 1-2mm across. See them here http://www.pbase.com/laroseforest/image/156532529 and here: http://www.pbase.com/laroseforest/image/156388482