1908] 
Muttkoicski, Dragon Flies of Wisconsin. 
65 
For convenience the Coinstock-Xeedham nomenclature and the 
other more commonly used by older writers are placed in juxtaposi- 
tion, the recent system to the left. 
C Costa or costal vein. 
Sc Subcosta or subcostal vein. 
H. & M Radius <fe media Median vein. 
B Basilar space. 
Cu Cubitus Submedian vein. 
A Anal vein Postcosta. 
HI First radial vein JVCedian vein. 
Rs Radial sector Subnodal sector. 
Ml First media Principal sector. 
M2 Second media Nodal sector. 
M3 Third media jNiedian sector. 
M4 Fourth media Short sector, 
Cul First cubital vein Upper sector of the triangle. 
Cu2 Second cubital vein Lower sector of the triangle. 
Al First anal vein. 
A2 Second anal vein. 
X Nodus. 
st stigma or pterostig'ma. 
ac antecubitals. 
pc postcubitals. 
o oblique vein. 
br bridge. 
ar arculus. 
s supra-triangular space. 
t triangle. 
I anal loop (resembling a foot.) 
m membranule. 
The spaces at the base of the wings below the costa, subcosta, 
media and the cubitus may be called, respectively, — costal, subcostal, 
median and cubital space. 
SUB-ORDER ZYGOPTERA. 
FA^riLY CALOPTERYGIDtE. 
SUB-FAMILY CALOPTERYGIN AE. 
The sub-family includes two genera, Calopteryx and Hseterina. 
The species readily attract the attention of the observer by their 
metallic colors, bodies a beautiful blue and green, and wings 
clouded with brown or black. In general their habits are retir- 
ing. They frequent ponds, springs, and also strong, steadily flow- 
ing waters. The two genera are distinguished as follows : 
Wings broad, basilar space free Calopteryx 
Wings narrower, basilar space cross-veined Haeterina 
CALOPTERYX Leach. Edin. Encyl. 9. p. 137, 1815 ; jSTeedham. Proc. 
U. S. Nat. Mus., 26, p. 715, 745, 74G, 1903 (Venation). 
A genus of wide distribution, numbering about i8 species. 
