A new species of Platyauchenia Stürm, 1843 (Coleoptera: Chrysomelidae: Cassidinae) from Brazil Author Staines, C. L. Department of Entomology, MRC 187 National Museum of Natural History, Smithsonian Institution P. O. Box 37012 Washington, DC 20013 - 7012, USA (e-mail: stainesc @ si. edu) text Insecta Mundi 2007 2007-08-24 2007 12 1 7 journal article 8304 10.5281/zenodo.4532607 4f24c0fe-251d-4224-9793-2d33af7a20cc 1942-1354 4532607 Platyauchenia ruficollis Staines , new species Figure 2 Holotype (female): [ Brazil ] Goyaz , Coiquna (?), I. M. Sousa , X. 1938 / F. Monros Collection 1959 / Holotype Platyauchenia ruficollis Staines (red label). Deposited in USNM. Description . Head, antennae, scutellum, legs, and venter black; pronotum red with two black transverse bands on disc; elytra black with red spot on basal ¼ along suture. Head: depressed between eyes; vertex punctate. Antenna: barely reaching base of pronotum; antennomere I twice as long as II; II transverse; III longest, more than twice length of II; IV-XI decreasing in length. Pronotum: widest at base, lateral margin notched just before posterior angle, rounded to apex; anterior angle with acute tooth; posterior angle with small obtuse tooth; densely coarsely punctate, punctures larger laterally; disc convex; pronotal length 3 mm ; pronotal width 7 mm . Scutellum: punctate; depressed apically. Elytron: lateral and apical margins smooth, explanate; apical angle slightly emarginate; sutural angle with small tooth; humerus produced; densely coarsely punctate; additional puncture rows present between rows 7 and 8 after middle; four costae present, 1 st beginning at base along suture, obsolete on apical ¼; 2 nd between rows 3 and 4 at base, slightly sinuate, continuing to apical ¼; 3 rd starting at humerus, curving toward suture around additional puncture rows, obsolete on apical ¼; 4 th between humerus and lateral margin on base; elytral length 11 mm ; elytral width 8 mm . Venter: abdominal sterna yellowish apically; pro-, meso-, and metasterna punctate and rugose laterally. Leg: femur punctate. Total length: 14 mm . Etymology . A combination of rufi (Latin = red) and collis (Latin = neck) for the reddish pronotum. Comparative notes . Platyauchenia ruficollis differs from P. latreillei by the following combination of characters: each elytron with four costae; sutural angle of elytra with small tooth; apical angle of elytra slightly emarginate; pro-, meso-, and metasterna punctate medially and rugose laterally.