Agroecus griseus Dallas, 1851: 199 Walker, 1867: 243 Stål, 1872b: 23 Distant, 1880: 329 Lethierry & Severin, 1893: 126 Agroecus tenebricosus Buckup, 1957: 8 Illustrated guide to Pentatominae (Hemiptera: Pentatomidae) species associated with the four main grain crops in Rio Grande do Sul state, Brazil Barros, Lurdiana D. Paim, Marcelo R. Krein, Verônica Carabajal, Victor Brandão, Marcela N. Bernardes, Paula De O. Lindner, Mariana F. Zootaxa 2021 2021-04-14 4958 1 430 478 Dallas, 1851 Dallas 1851 [151,518,402,429] Insecta Pentatomidae Agroecus GBIF Animalia Hemiptera 8 438 Arthropoda species griseus  ( Figs 16–19)      Agroecus griseus Dallas, 1851: 199;  Walker, 1867: 243;  Stål, 1872b: 23;  Distant, 1880: 329;  Lethierry & Severin, 1893: 126; Kirkaldy, 1909: 63; Jensen-Haarup, 1937: 171; Buckup, 1957: 8; Buckup, 1961: 9; Rider & Rolston, 1987: 437–438.   Agroecus tenebricosus Buckup, 1957: 8.   Material studied.Barra do Ribeiro:  1♂, Boa Vistafarm, 30°27’25.4”S 51°16’23.8”W,  16.XII.2003, Probio Teamleg. ( MCNZ).  Itaúba:  1♀,  06.IV.1978, H. Bischoffleg. ( MCNZ);  1♂, 1♀,  18.IV.1978, M. H. Galileoleg. ( MCNZ);  1♂, 1♀,  06.IV.1978, E. H. Buckupleg. ( MCNZ);  2♀,  06.IX.1978, E. H. Buckupleg. ( MCNZ).  Palmares do Sul:  1♀, 1♂, Capivari Lakeisthmus, 30°15’08.2”S 50°32’01.1”W,  20.V.2004, Probio Teamleg. ( MCNZ). Porto Alegre:  1♂, Agronomia,  24.X.1985, Fernandesleg. ( UFRG);  1♂, Vila Assunção,  21.IV.1985, A. Mohrleg. ( UFRG);  1♂,  26.XI.1991, J. A. M. Fernandesleg. ( UFRG);  1♀,  24.IX.1952( MCNZ);  1♀,  23.IX.1952( MCNZ);  1♀,  09.V.1951( MCNZ);  1♀,  23.XII.1952( MCNZ);  1♀,  08.IX.1948( MCNZ);  1♀,  18.II.1953( MCNZ);  1♂,  13.V.1953( MCNZ);  1♂,  03.X.1951( MCNZ),  1♂,  18.VIII.1954( MCNZ);  1♂,  24.X.1956( MCNZ);  1♂,  27.VI.1953( MCNZ);  1♂,  20.IX.1954( MCNZ);  1♂,  05.X.1949( MCNZ). São Leopoldo:  1♀, ( MCNZ).  Triunfo:  1♂, Parque Braskem, main trail,  16.IX.2009, A. Barcellos& D. Casagrandeleg. ( MCNZ);  1♂, Parque Copesul, Mirante do Umbutrail,  29.IV.2003, ( MCNZ);  1♂, Parque Copesul, portico trail,  29.IV.2003, ( MCNZ);  1♂, Parque Copesul,  19.XI.2002, ( MCNZ).  Tupandi:  1♀,  V.2009, R. V. Dalbemleg. ( UFRG).   FIGURES 16–19.  Agroecus griseus. 16: Dorsal view, scale bar = 1.0 mm. 17: Corium, with unpunctured bands. 18: Fore and mid femora bearing small tubercles. 19: Distribution within Rio Grande do Sul.  Diagnostic features.Body grayish. Head wider than long; mandibular plates and clypeus subequal in length. Anterolateral margins of pronotum straight or sub rectilinear and crenulated ( Rider & Rolston 1987); humeral angles weakly produced and obtuse; trans-humeral band with callosities but without punctures ( Fig. 16). Scutellum with a prominent Y-shaped tubercle ( Fig. 16). Corium bands without punctures ( Fig. 17, red arrow) and minute teeth on lateral margins ( Fig. 17). All femora with two rows of small tubercles bearing setae ( Fig. 18). Body length: 7.00– 8.50 mm.  Recorded host plants.Maize ( Gassen 1996; Fávaro et al. 2012).   Distribution in Rio Grande do Sul.Barra do Ribeiro, Itaúba, Palmares do Sul, Porto Alegre, Santa Maria, São Leopoldo, Triunfo and Tupandi ( Fig. 19).  New records.Barra do Ribeiro, Itaúba, Palmares do Sul, Porto Alegre, São Leopoldo, Triunfo and Tupandi.   Comments.This species feeds at the base of plants, affecting tissue formation during growth ( Gassen 1996). 3083767403 2003-12-16 MCNZ Probio Team -30.457056 Boa Vista 1 -51.273277 8 438 1 1 3083767393 [313,387,675,701] Itauba 8 438 1 3083767473 [397,872,675,701] 1978-04-06 MCNZ H. Bischoff 8 438 1 1 3083767351 [883,1432,675,701] 1978-04-18 MCNZ M. H. Galileo 8 438 2 1 1 3083767448 [151,709,711,737] 1978-04-06 MCNZ E. H. Buckup 8 438 2 1 1 3083767461 [721,1232,711,737] 1978-09-06 MCNZ E. H. Buckup 8 438 2 2 3083767355 [1243,1432,711,737] Palmares do Sul 8 438 1 3083767322 [151,1277,746,773] 2004-05-20 MCNZ Probio Team -30.252277 Capivari Lake 1 -50.533638 8 438 2 1 1 3083767376 [151,748,782,809] 1985-10-24 UFRG Fernandes Agronomia 8 438 1 1 3083767400 [761,1381,782,809] 1985-04-21 UFRG A. Mohr Vila 8 438 1 1 Asuncion 3083767460 1991-11-26 UFRG J. A. M. Fernandes 8 438 1 1 Asuncion 3083767346 [672,960,818,845] 1952-09-24 MCNZ 8 438 1 1 Asuncion 3083767321 [972,1260,818,845] 1952-09-23 MCNZ 8 438 1 1 Asuncion 3083767450 1951-05-09 MCNZ 8 438 1 1 Asuncion 3083767440 [266,562,854,881] 1952-12-23 MCNZ 8 438 1 1 Asuncion 3083767409 [573,860,855,881] 1948-09-08 MCNZ 8 438 1 1 Asuncion 3083767341 [871,1147,854,881] 1953-02-18 MCNZ 8 438 1 1 Asuncion 3083767396 [1158,1432,854,881] 1953-05-13 MCNZ 8 438 1 1 Asuncion 3083767463 [151,437,890,917] 1951-10-03 MCNZ 8 438 1 1 Asuncion 3083767413 [452,766,890,917] 1954-08-18 MCNZ 8 438 1 1 Asuncion 3083767368 [782,1068,890,917] 1956-10-24 MCNZ 8 438 1 1 Asuncion 3083767330 [1083,1379,890,917] 1953-06-27 MCNZ 8 438 1 1 Asuncion 3083767458 1954-09-20 MCNZ 8 438 1 1 Asuncion 3083767405 [413,703,926,953] 1949-10-05 MCNZ 8 438 1 1 Asuncion 3083767438 [903,1062,927,953] MCNZ 8 438 1 1 Asuncion 3083767312 [1078,1167,927,953] Triunfo 8 438 1 Asuncion 3083767467 2009-09-16 MCNZ A. Barcellos & D. Casagrande Parque Braskem 8 438 1 1 Asuncion 3083767412 2003-04-29 MCNZ Mirante do Umbu Parque Copesul 8 438 1 1 Asuncion 3083767366 [407,1044,999,1025] 2003-04-29 MCNZ Parque Copesul 8 438 1 1 Asuncion 3083767435 2002-11-19 MCNZ Parque Copesul 8 438 1 1 Asuncion 3083767358 [264,361,1035,1061] Tupandi 8 438 1 Asuncion 3083767457 [371,817,1035,1061] 2009-05 UFRG R. V. Dalbem 8 438 1 1 Asuncion