Identification of second instar larvae of Panchaetothripinae (Thysanoptera Thripidae) in Brazil and Argentina Author Lima, Élison Fabrício B. Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3.5. Floriano, PI, Brazil. 64808 - 605. Author O’Donnell, Cheryle A. United States Department of Agriculture, Animal and Plant Health Inspection Service, Plant Protection and Quarantine, Plant Health Programs, National Identification Services. 10300 Baltimore Avenue, Beltlsville, MD, USA. 20705. Author Sousa, Yago Lucas C. Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3.5. Floriano, PI, Brazil. 64808 - 605. Author Zamar, María Inés Instituto de Biología de la Altura, Universidad Nacional de Jujuy. Avenida Bolivia 1661, San Salvador de Jujuy, Argentina. 4600. text Zootaxa 2021 2021-10-01 5047 4 453 464 journal article 10.11646/zootaxa.5047.4.5 1175-5326 5543069 AEE40945-007F-431F-AC14-820B915DF906 Dinurothrips hookeri Hood ( Figs 1, 10 , 17 , 26, 27, 36 ) Head pale, pronotum pale with anterior margin red, meso- and metanotum pale with red line posteromedially, abdominal segments I–VIII pale with red internal pigment, IX–X dark brown (black in alive individuals; brown in washed specimens) ( Fig. 1 ). Antennal segment III with setae much shorter than the length of the segment ( Fig. 10 ). Dorsal setae with apex expanded. Head setae D3 expanded; setae D1 inserted anteriorly to setae D4 ( Fig. 17 ). Pronotum with sclerotized blotches (pale in washed specimens). Abdominal tergite II with a pair of spiracles; segments IX–X completely sclerotized; segment X with six anal setae shorter than the segment length ( Fig. 36 ). Spiracles with facets with one to four pores ( Figs 26, 27 ). Larvae II have been studied from Brazil from the states of São Paulo , Acre and Piauí from plants such as Impatiens balsamina , Mentha sp. and grasses (CHNUFPI).