Measurements of total fresh mass for some species of Odonata from Kansas and Missouri, United States

The author has previously presented mass data for some Odonata collected in Kansas and Nebraska in the United States (R.J. BECKEMEYER, 1998, Notul. odonatol. 5: 35-37). In this paper a number of additional species are reported upon. Collections were made during 1999 and 2000, mostly in Kansas, but with several specimens also taken in Missouri. Both states are located in the central plains of the United States. Measurements were made using a Scientech SA-120 electronic analytical balance, to an accuracy of 0.1 mg. Specimens were kept in glassine envelopes stored in zip-lock plastic bags on ice in a cooler until they could be weighed. Measurements were made of live insects within several hours of their capture. All specimens were mature adults.