piungerford: aquatic hemiptera. 75 



long.; the apex of the second joint and all of the third and fourth joints 

 blackish; the second joint about twice as long as the basal one and much 

 more slender; the third and fourth slender, subequal; all but the basal 

 one with erect hairs. Pronotum trapezoidal, transverse, very narrow in 

 front, the sides oblique, a little prominent at the shoulders, the lateral 

 margins very slenderly reflexed, decurved, and lost before reaching the 

 anterior margin; the surface very minutely scabrous; anterior lobe 

 moderately elevated, transversely indented on the middle, the impressed 

 line distinct but not very deep; posterior division a little shorter, mod- 

 erately flattened; posterior margin a very little sinuated, the humeral 

 angles oblique, short, flat, the outer angles subacute, with an oblong 

 tubercle placed next the outside. Scutellum long, moderately depressed in 

 the middle, and more deeply each side, coarsely scabrous at base, finely 

 rugulose on the apical division. Pectus and sternum jet-black, highly 

 polished, closely covered with appressed, fine, white pubescence. Legs 

 pale testaceous; the coxse black, with white tips; femora broadly banded 

 near the tip with fulvous; tibiae piceous at tip, and with pale piceous 

 spines; apex of the last tarsal joint black, the nails pale piceous. 

 Hemelytra velvety-black, minutely, densely clothed with black and golden 

 pubescence, minutely punctate; the costal margin broadly arcuated, with 

 the edge narrowly reflexed; the costal area broad, pale yellow or white, 

 with a small, black, longish patch at base, another oblong, large spot 

 behind the middle, against the inner margin, and a trace on the outer 

 margin, and the tip vdth a transverse black spot; nervures black; middle 

 areole with an oval spot near the outer nervure, basally, a round one a 

 little way behind this, a few specks behind the middle, a dot near the 

 apex inwardly, and a dot near the inner tip of the clavus pale yellow; 

 membrane pale yellow, a little clouded at base and on the apical margin, 

 the apex with a piceous spot on the apex of the outer areole; nervures 

 piceous; the areoles with a transverse series of oblong fuscous spots 

 (sometimes the spots are interrupted, forming a partially double series.) 

 Venter black, clothed with prostrate white pubescence, the posterior mar- 

 gin of the segments slenderly piceous; the apical segment of the female 

 broadly white. 



"Length to tip of hemelytra, 3-3% mm. Width of base of pronotum, 

 IVi mm. 



"Common in Maryland, within the limits of the metamorphic belt, upon 

 damp sand formed by the disintegration of the rocks, near creeks and 

 brooks, in June and July. It is also common in Northwestern and North- 

 ern Florida; and specimens have been sent to me from Texas, Illinois, and 

 Pennsylvania. I have also collected it in Cambridge, Mass., and in the 

 vicinity of Washington, D. C. It occurs likewise in western North Carolina 

 and in Georgia. It is of precisely the same form as iS. cincta H. Schf., of 

 England and France, agreeing with that species in most of its details, and, 

 upon sufficient comparison, may prove to be the same species." — Uhler. 



Also reported from Maine, Ontario, Rhode Island, New York, New 

 Jersey, Ohio, Colorado and California. 



Parshley adds Massachusetts. 



Micracanthia pusilla Van Duzee 1914. 



Van Duzee, Trans. San Diego Soc. Nat. Hist., II, p. 32, 1914. 



"Size and much the aspect of humilis Say, but with broader elytra. 

 Elytra deep black with two white costal spots and the membrane strongly 

 distinguished. Length 3 mm. 



"Head as in humilis, black, with a transverse white line at the base of 

 the tylus. Antennae black, the joints subequal; the first a little shorter, 

 the second longer than the third and fourth. Rostrum black. Pronotum 

 broader posteriorly than in humilis, sides nearly straight, the humeral 

 angles a little more rounded; hind margin broadly but shallowly exca- 

 vated. Scutellum as long as broad, with a shallow transverse impression, 



