HUNGERFORD: AQUATIC HEMIPTERA. 129 
equal to the third, the fourth decidedly shorter than the third’ Thorax 
obese, the pronotum velvety blackish, sparingly clothed about the sides 
with fine golden pubescence; collum with an orange band which is in- 
terrupted in the middle; middle line faintly carinated; the tip of pro- 
notum produced at tip, curved upwards, its extreme end expanded, emar- 
ginated, and each process granulated; the humeri prominent in the 
winged individuals, in the unwinged it is obliquely rounded. Pectus 
bluish, sericeous, each side of prosternum broadly orange. Coxe, tro- 
chanters, and usually the base of femora, yellow; the femora bronzed or 
bluish-black, minutely hoary pubescent; the tibize and tarsi duller black; 
posterior femora of the males stouter than of the females, in both with a 
yellow, black-tipped, curved spur beyond the middle, and from it to near 
the tip series of minute teeth. Abdomen moderately compressed (very 
strongly compressed in the unwinged females), minutely sericeous, 
pubescent, excepting on the middle of tergum, which is bald, shining 
black; the raised upper edge of the connexivum orange, in the female its 
posterior tips produced into long slender spines. The middle of the ante- 
genital ventral segment of the male quadrately, broadly flattened, each 
side of which a little elevated. Basal genital segment of the female 
broadly black on the middle. The cerci of the male are long, slender, 
curved, hairy processes. Length, 3% to 4 mm. Breadth of pronotum, 
1% mm.” 
Localities, taken from Van Duzee: Ontario, Maine, Massachusetts, 
Vermont, New York, New Jersey, Pennsylvania, Maryland, District of 
Columbia, Virginia, North Carolina, Florida, South Carolina, Ohio, 
Michigan, Tennessee, Utah, and California. 
Rhagovelia distincta Champ. 
Champion, Biol. Centr. Am., II, p. 135. 
“Winged form. Moderately elongate, black, the legs with a green or 
bluish-green lustre, the pronotum with a narrow transverse fulvous mark 
on each side of the disc in front, the base of the antenne, the prosternum, 
the coxz and trochanters entirely or in part, the base of the anterior 
femora, the connexival margins, and in the males the terminal ventral 
segment in the middle and the underside of the first genital segment, 
more or less flavous; the pleura and under surface bluish-grey; the body, 
legs, and antenne very finely pubescent, and also clothed (the two apical 
joints of the antennz excepted) with long scattered setz, the pronotum 
usually with a transverse patch of greyish or silvery pubescence on each 
side in front. Head with a smooth impressed median line; antennz 
moderately long, joint 1 about one-half longer than 2, 2 and 3 equal in 
length, 4 shorter than 3, stout, fusiform. Pronotum with a distinct 
median ridge, and produced behind into a spiniform process, the surface 
sparsely and finely punctured. Legs long and rather slender, the hind 
tibiz with a very short, indistinct tooth at the apex; intermediate tarsi 
with joints 2 and 3 subequal in length. 
“Male. Anterior tibizw dilated in their apical half; posterior femora 
4 moderately incrassate, armed on the inner side with a long, partly flavous, 
_ tooth at about one-third from the base, and with a row of short teeth 
_ extending thence to the apex (in some of the well-developed apterous 
examples also closely and finely denticulate along the basal third) ; 
_ posterior tibie finely denticulate and slightly sinuous within. Pronotal 
f| 
\ 
; 
spine short. Sixth ventral segment broadly flattened along the middle 
and feebly arcuate-emarginate at the apex. 
“Female. Posterior femora not stouter than the intermediate femora, 
_ armed with a very long, acute, blackish tooth at about the middle, and 
4 very finely denticulate thence to the apex; posterior tibix straight, ob- 
9—Sci. Bul.—1669 
