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HUNGERFORD: AQUATIC HEMIPTERA. low 
cox; antennze moderately long, brownish, finely pubescent, the basal 
joint yellow at base, much longer than the third, which is also much 
longer than the second, the fourth about as long as the second, thick, 
distended in the middle. Pronotum very moderately convex behind the 
middle, sloping posteriorly; the anterior lobe short, collar-like, with 
oblique sides, a yellow spot on the middle, and feebly carinate lateral 
margins, it is separated from the posterior lobe by a deeply incised line; 
the posterior lobe is somewhat abruptly wider, with strongly reflexed 
lateral margins and subacute humeral angles, with the posterior margin 
abruptly deflexed; a broad segment behind this has in the depressed 
outer corner a tumid callosity which occupies the position of the wing- 
pad. The propleural flap is mostly yellow, as is the cap of the inter- 
mediate, and posterior coxe and also coxe, trochanters, base of anterior 
femora, and the immediate base of posterior femora; other parts of legs 
fuscous, sericeous pubescent, and the posterior femora unarmed. The 
posterior border of last ventral segment and sometimes the genital seg- 
ment yellow. 
“Length to end of abdomen, male, 2144; female, 3%, mm. Width of pro- 
notum, male, 1; female, 14%, mm. 
“This is a common species on the surface of salt water around the in- 
lets of the Florida Keys. Several specimens were secured in the Bay 
of St. George’s, on the leeward side of Grenada, September 6, on the 
surface of the sea. Only specimens taken in copula were kept. 
“Others were captured at the southern end of the island of St. Vincent, 
May 24, swimming on the sea, in a sheltered and still place near the 
shore. Gregarious in habits, 50 to 60 together. They were also taken 
in copula at this time. 
— “The male is very much smaller than the female, and the latter is 
usually marked by a carinate line on the middle of the contact of the 
two lobes of the pronotum.”’ 
From Florida now, as well. 
Genus VELIA Latr. 1804. 
The largest bugs of the family belong here. The tarsi are 3-seg- 
mented all around, and the middle tarsi are not cleft. Dimorphism as to 
wings occurs. Ocelli are absent. Four species for our range. 
| KEY TO VELIA. 
_A. Intermediate tarsi much longer than the posterior tarsi; segment 
2 much longer than 3; segment 2 of hind tarsi shorter than 3. 
t V. australis Bueno. 
AA. Intermediate tarsi little longer (if any) than the posterior tarsi. 
1 B. Intermediate tarsi, with segments 2 and 3 subequal. 
5 V. stagnalis Bueno. 
BB. Intermediate tarsi, with segment 2 longer than 3. 
C. Antenne, with segment 1 one-half longer than 2; legs 
rather short; 5th ventral segment not produced in male. 
V. brachialis Stal. 
; CC. Antenne, with segment 1 nearly twice as long as 2; legs 
§ long; 5th ventral segment produced in the male. 
“4 V. annulipes Champ. 
