DIDY MOPS 169 
we gather that he found the males patrolling the larger pools of the 
stream, most abundantly on calm clear forenoons. The females he saw 
ovipositing in the larger pools. They flew back and forth 40 to 50 feet, 
touching the water at 3 to 5 foot intervals to liberate eggs, and generally 
persisted at their task until seized and carried away by a male. He 
found the cast skins of the nymphs sticking to the trees whose bare 
roots dipped into the water on under-cut banks of the pools. 
128. Macromia georgina Selys 
Selys ’78, p. 197: Mtk. Cat. p. 120. 
Length 71 mm. Expanse 96 mm. N. C., Ga., Tex. 
A pale-faced brownish species that has in addition to the usual paler areas 
on the middle of the labrum and on the postclypeus, a rather broad transverse 
band of the same color just beneath the ridge on the frons. There are the usual 
four obscure pale spots on the frons above. The vertex is peaked, bifid, bare and 
brown. The pale stripes of the front of the thorax are rather narrow, and taper 
upward and end far below the crest. Legs black. Wings hyaline; costa and 
stigma brown. The pale markings of the abdomen are continuous across the 
middorsal line on segments 2, 7 and 8, on 2 linear, on 7 saddle shaped, on 8 
smaller but similar, on 3 to 6 broken on the middle line to form pairs of spots. 
Segments 9, 10 and appendages black. 
129. Macromia australensis Williamson 
Wmsn. ’09, p. 381: Mtk. Cat. p. 120. 
Length 75 mm. Expanse 104 mm. Okla., Tex. 
A large dark colored species with a minimum of pale markings for the genus. 
Face brownish, with the middle of the labrum and most of the postclypeus pale. 
Top of frons scarcely spotted. Peak of vertex, bifid, brown, bare. No stripe 
on front of thorax, the single median side stripe conspicuous. Legs black. Wings 
hyaline, costa and stigma brown. Pale markings of the abdomen are continuous 
across the median dorsal line on segments 2 (where transversely linear), and on 7 
(where a broad saddle mark), and on 8, and divided by black of the mid dorsum 
on 3 to 6. Appendage and segments 9, 10 and appendages black. 
26. Dipymops Selys 
These large dragonflies differ from Macromia chiefly in the confor- 
mation of the top of the head, as indicated in the key, and in small 
details of venation. The subtriangle of the forewing is generally divided 
by a cross vein, and the membranule is very broad. 
The flat, long-legged nymphs (Ndm. ’01, p. 481) dwell in the silt in 
the beds of lakes and ponds and in settling basins of streams. They 
sprawl on the bottom, usually in the midst of trash, and are oftenest 
found where falling silt has partly covered them, leaving only the tips 
