SUBFAMILY I. — MIRING. 675 



KEY TO EASTERN SPECIES OP TRIGONOTYLUS. 



a. Head not distinctly elongated between the eyes and base of antennae; 

 eyes usually prominent, oval or nearly round. 

 b. Hind tarsi and tips of hind tibiae black. 647. tarsalis. 



bb. Tarsi usually reddish, tips of hind tibiae not black. 



c. Joint 1 of antennae not or but slightly longer than head. 

 d. Basal joint of hind tarsi slightly longer than remaining two 

 united; pronotum usually with longitudinal fuscous stripes; 

 antennae reddish. 648. ruficornis. 



dd. Basal joint of hind tarsi slightly shorter than remaining two 

 united ; pronotum without fuscous stripes. 

 e. Head and pronotum each with three roseate stripes, those of 

 head uniting at apex of tylus; antennae reddish at base, fus- 

 cous toward apex. 649. pulcher. 

 ee. Head, pronotum and antennae uniformly pale. 650. brevipes. 

 cc. Joint 1 of antennae one-half or more longer than head ; pronotum 

 with three or four pale orange or fuscous stripes, these some- 

 times prolonged backward onto scutellum and elytra. 

 /. Larger, length 6.2 — 7.5 mm. ; antennae greenish-yellow, joint 

 4 dusky; eyes large, elongate-oval. 651. uhleri. 

 //. Smaller, length less than 5 mm. ; antennae in great part red ; eyes 

 small, rounded. 652. longicornis. 

 aa. Head distinctly elongated between front margin of eyes and base of 

 antennae, the sides at this point parallel; eyes not prominent, dis- 

 tinctly longitudinal; antennae often pinkish. 653. confusus. 



647 (893). Trigonotylus tarsalis (Reuter), 1876, 60. 



Color a nearly uniform pale greenish-yellow, fading to dull straw- 

 yellow. Antennae from middle of joint 2 to apex of 4 often reddish; joint 

 3 scarcely shorter than 2. Pronotum minutely transversely strigose, a 

 distinct impression just in front of middle of disk. Elytra feebly taper- 

 ing from middle to their conjointly rounded tips. Length, 5.5 — 6.2 mm. 



Argo and Chicago, 111., June 14 — July 24 ; taken at light and 

 by sweeping (Gerhard). Doubtless occurs in northern Indiana. 

 Ranges from southern New England west to North Dakota and 

 Manitoba and southwest to Kansas and Texas. Breeds on 

 slough grass (Spartina). 



648 (890). Trigonotylus ruficornis (Geoffroy), 1785, 209. 



Pale green fading to greenish-yellow; antennae dull red throughout; 

 pronotum often with four vague fuscous stripes with a narrow pale line 

 between the two median ones; tarsi reddish, the claws black. Pronotum 

 more widened behind than in our other species. Length, 5.5 — 6 mm. 



Marion Co., Ind., June 5 — Aug. 4 ; swept in some numbers 

 from grasses and wild rye along a railway embankment 

 (W.S.B.). Whiteface Mt., N. Y., July (Davis). Chicago, 111., 

 and St. Anthony Park, Minn., July (Gerhard). A European 



