Chewing lice (Phthiraptera) from buntings, cardinals and tanagers (Passeriformes: Emberizidae, Cardinalidae, Thraupidae) from Costa Rica, with descriptions of two new species of the genus Myrsidea (Phthiraptera: Menoponidae) Author Č, Ř Á text Zootaxa 2007 1631 57 68 journal article 10.5281/zenodo.179415 4bbc16dd-23b5-4726-a4dc-0f6b2688c0d4 1175-5326 179415 Host: Cyanocompsa cyanoides (Lafresnaye) – Blue-black Grosbeak One chewing lice species was found on this host: Myrsidea sp. 1 Material studied. 3 males and 2 nymphs ex Cyanocompsa cyanoides , COSTA RICA : Hitoy Cerere BR, Provincia Limỏn ( 9°40’N , 85°05’W ), 19–25 August 2004 , Literák, Č apek & Havlίček coll. Deposited in INBio –O. Sychra CR61, 2 nymphs ex C. cyanoides , Barbilla NP, Provincia Limỏn ( 9°59’N , 85°27’W ), 2 September 2004 , Literák, Č apek & Havlίček coll. Deposited in INBio – O. Sychra CR61. Remarks. Unlike Myrsidea poliogasteri , Myrsidea sp. 1 from C. cyanoides is characterised by a welldefined median gap in the rows of tergal setae. Our specimens are practically inseparable from that of M. zonotriciae Price & Dalgleish 2007 described from Zonotrichia capensis (Emberizidae) . Unfortunately, having no female specimens is insufficient for an adequate confirming Myrsidea sp. 1 either as a different new species or a new host-louse association for M. zonotriciae . Four of 12 birds examined were parasitised by Myrsidea sp. 1. This is the first record of chewing lice from Cyanocompsa cyanoides .