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 .