214 THE UNIVERSITY SCIENCE BULLETIN. 



Thamnotettix melanogaster (Prov.). 



Jassus melanogastfr Prov., Nat. Can., iv, p. 378, 1872. 



Thamnotettix melanogaxter Prov., Pet. Faune Ent. Can., iii, p. 284, 1890. 

 Thamnotettix melanogaster Osb., Proc. la. Acad. Sci., i, pt. 2, p. 126, 1892. 

 Thamnotettix melanogaster Osb., 20th Rept. N. Y. St. Ent., p. 537, 1905. 

 Thamnotettix melanogaster Osb., Me. Agr. Exp. Sta., Bui. 238, p. 136, 1915. 

 Thamnotettix melanogaster DeL., Tenn. St. Bd. Ent., Bui. 17, p. 80, 1916. 

 Thamnotettix melanogaster Van D., Cat. Hemip. N. A., p. 682, 1917. 



Form: Long and narrow. Length, 4.75 to 5.25 mm. Vertex distinctly 

 produced, nearly half longer on middle than next the eye, one-third wider 

 than long, disc flat or slightly concave. Pronotum nearly twice as wide 

 as long, lateral margins ^distinct. Elytra very long. 



Color: Brownish or yellowish-green, sometimes washed with orange. 

 Vertex with four large black spots on margin, the two middle ones larger 

 than the outer, disc unmarked. Scutellum with dark transverse im- 

 pressed line. Face yellow. Abdomen black beneath. 



External genitalia : Female, last ventral segment as long as preceding, 

 narrowed posteriorly, posterior margin slightly emarginate; pygofers 

 long, widest at the middle, exceeded by ovipositor, quite bristly on distal 

 half. Male, valve large, broad and triangular, obtusely angled apically; 

 plates very characteristic, broad basally, outer margin sinuately convex 

 to acute, dark, chitinous apex, inner margin concave, so that apices are 

 turned toward each other, a row of bristles running diagonally across 

 before the middle, while on the outer margin and apically are long silky 

 hairs; pygofers taper to long acute tips that exceed the plates. 



Distribution: Reported from Riley county. 

 Hosts: Professor Osborn records this species as being com- 

 mon on coarse grasses and sedges on low ground. 



Thamnotettix ciliatus Osb. 



Thamnotettix ciliatus Osb., Proc. la. Acad. Sci., v, p. 244, 1898. 

 Thamnotettix ciliatvs Osb., Me. Agr. Exp. Sta., Bui. 238, p. 138, 1915. 

 Thamnotettix ciliatus Van D., Cat. Hemip. N. A., p. 683, 1917. 



Form: Elongate like preceding species. Length, 4.5 to 5.5 mm. Ver- 

 tex nearly twice as wide as long, about one-third longer on middle than 

 next the eye, broadly rounded apically and obtusely rounding with front. 

 Pronotum less than twice as wide as long, lateral margins short, humeral 

 margins long. Elytra characteristic of the genus. 



Color: Green or yellowish-green. Vertex yellow with four large black 

 spots on margin, a spot, varying greatly in size, back of the ocelli and 

 often two small parallel lines on the disc about half way between tho 

 base and the apex. Pronotum with disc greenish, margins frequently 

 more yellow. Scutellum yellow. Elytra greenish, hyaline, apex some- 

 times smoky, nervures yellow or whitish. Face yellowish-green with 

 antennal pits and sutures of front black, sometimes with black arcs. 

 Nearly entirely black beneath. 



External genitalia: Female, last ventral segment slightly longer than 

 preceding, narrowed posteriorly, posterior margin slightly concave; pygo- 



