1894.] HEMIPTERA-HETEROPTERA OE GRENADA. 217 



Mount Gay estate during the same month on spring-water ; like- 

 wise on the Grand Etang, at an altitude of 1900 feet, on water. 



It differs from R. collaris, Burm., in the coloured margins of 

 pronotum, the more numerously denticulate femora, colour of 

 venter, and size. 



3. Khagovelia pltthbea, sp. nov. 



Only the unwinged form is at present known. It is short and 

 thick, subcorneal posteriorly, bluish plumbeous, opaque, minutely 

 hairy, with the sides of the abdomen broadly reflexed. The head 

 wide, convex, with a slender black line on the front, the orbits of 

 the eyes bordered with yellow ; the rostrum testaceous, reaching 

 considerably behind the anterior coxae ; antennas 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 intermediate and posterior coxae and also the 

 coxae, 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 segment yellow. 



Length to end of abdomen, d 2|, $ 3| mm. ; width of pro- 

 notum, c? 1, $ 1| mm. 



This is a common species on the surface of salt-water around 

 the inlets of the Florida Keys. Several specimens were secured in 

 the Bay of St. George's, on the leeward side of Grenada, Septem- 

 ber 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 inhabits, 50-60 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. 



Mesovelia, Muls. 

 1. Mesovelia BisiGNAT a, Uhler. 



Mesovelia bisignata, Uhler, Standard Nat. Hist. ii. p. 273, fig. 324. 

 A fine series of this insect was secured at Woburn, Granville, 



