Vol. xxvi] ENTOMOLOGICAL NEWS. 293 



A. Punctures of the mesonotum coarse or rather coarse. 



B. Punctures very deep and coarse, wings somewhat brownish, 

 tegulae not punctured. 



C. Tibiae and tarsi rather light brown, wings very slightly 

 brownish ; sides of all the abdominal segments, except the 

 first, with triangular patches of short, buffy hair; 6.8 mm. 

 Nebraska H. bruneri Crawford 



CC. Legs black; wings distinctly brown; discs of abdominal 

 segments 3 to 5 and sides of 2 with thin yellowish-white 

 pubescence ; 7 mm. Widely distributed. 



H. cressoni Robertson 

 BB. Punctures only moderately coarse; wings not brownish. 



D. Facial quadrangle almost square; tegulae with fine scat- 

 tered punctures, not making the surface opaque; wings 

 ample, hyaline, stigma and nervures dilute brown ; 7.5 mm. 

 Eastern States H. nymphaearum Robertson 



DD. Facial quadrangle longer than broad, distinctly narrowed 

 below; tegulae impunctate; wings more or less milky white, 

 stigma and nervures testaceous ; 5 to 6.5 mm. Widely dis- 

 tributed H. albipennis Robertson 



A A. Punctures of the mesonotum fine and scattered ; facial quadrangle 

 very little if at all longer than broad. 



E. Abdomen without metallic reflections ; mesonotum shiny, or 

 with but very fine lineolations. 



F. Facial quadrangle broader than long, clypeus short, scarcely 

 reaching below the eyes ; mesonotum shiny, the punctures 

 fine but not widely separated; tegulae rufo-testaceous; wings 

 hyaline, the nervures and stigma pale testaceous ; abdomen 

 dark brown with short grayish pubescence ; 7.5 mm. Texas. 



H. connexus Cresson 



FF. Facial quadrangle almost square, clypeus produced about 

 two-thirds of its length below the eyes ; mesonotum shiny, 

 the lineolations very fine or absent ; punctures a little closer 

 than in H. subconne.rus Ellis but finer than in any other 

 species of the entire group; abdomen black, shiny and glab- 

 rous ; wings slightly brownish, stigma and nervures reddish 



brown; 7 mm. Wisconsin H. nigroviridis Graenicher 



EE. Abdomen greenish or with very strong metallic reflections ; 

 mesonotum finely and sharply lineolate, with very fine and widely 

 separated punctures ; the last three abdominal segments covered 

 with a thin ochraceous pubescence; tegulae brown. 



G. Wings hyaline, stigma and nervures testaceous; 6 mm. 

 Widely distributed H. subconnexus Ellis 



GG. Wings brownish ; 6.5 mm. Virginia. 



H. subconnexus rohweri Ellis 



