GOMPHUS 91 
narrower than the bordering pale bands. Stripe 2 free above, then joined to stripe 
3, then separated by a pale line to the level of the collar. Stripe 4 broad, some- 
what diffuse and ill-defined on its posterior margin, tending toward confluence 
through its whole length with stripe 5, which is complete. Wings hyaline, faintly 
tinged with yellowish at base. Legs black, tibiae yellow externally. The usual 
middorsal row of pale spots on the abdomen, are broadened on the 9th segment 
and diffuse and obscure on 10. The yellow lateral spot on segment 9 extends the 
full length of the side margin of that segment. 




externus 
2 ON 
2 Oh WY 
fraternus 
yi Md, SA 
crassus 
The habits of this species were observed at Havana, IIl. by the 
senior author in June and July 1896. The males were commonly seen 
flying about the floating house-boat laboratory, chasing one another, 
making long irregular sweeps together, and then flying apart and 
seeming to alight by preference on the boathouse deck, and on a floating 
cage nearby. They were most in evidence about mid-day. At rest, 
they sat flat upon the boards or on the bare sand, tail elevated, wings 
declined, touching the sand, in an attitude of great alertness. Their 
food was taken in swift sallies from such resting places. 
Females were much less frequently seen. When ovipositing they flew 
over the water, dipping the tip of the abdomen to wash off the eggs. A 
