171 



ON THE THYSANOPTERA 



OF THE BOTANICAL GAllDKXS, BRUSSELS. 



IKy Kivliard S. Kagnall. 



Diiring my ffequent tliougli short visits to Brussels last ycar I 

 collectert a number ot' Thysnnoptera tVom the hol-houses in the 

 Hotanical Gardens, comprising eight species in ail. 



Of thèse, Ileliothrips hœniorrlioidalis (Bouciik), //. foiioraUs 

 (l\EiiTER), aiid Parllicnolhrips dracœnœ (Heeger), are well-known 

 hothouse species; Leucothrips 7ii{iri pennis {Reuteh) was foiind by 

 llEUTER in a hot-house at Helsingfors, Finland, in 1904, and has 

 not, so far as I know, been recorded since ; and EuUirips orchidii 

 ( Moulton) was previously only know froni California, U. S. A. 

 Anaphotlirips orchidaccns (Bagnall), though apparently a not un 

 common pest in orchid-houses, has only l'ecently been desci"ibed, 

 whilst the othertwo species, Euthrips longipennis and Ccphcdolhrips 

 spinosHs are apparently new to science. Although none of thèse 

 species bave been recorded from Belginm there is a large sei'ies of 

 Heliotlirips Jicoaorrlio/dalis and the variety abdominaUs (Reuter), 

 in the Miiseuni at Brussels. 



THYSANOPTERA 



Family THRIPID>E 



Genus ANAPHOTHRIPS Uzel, 1895 



1. — Anaphothrips orchidaceus Bagnall, lOOi). 

 Anaphotlirips orchidaceus (Bagnall) [1]. 



This species has long been known to horticulturists as the 

 « Yellow ïhrips » or « Yellow Orchid Thrips », and is injurions 

 to varions hot-house Orchids. I bave noticed it on Odoïitoglossuni, 

 CypripediiDii and Zygopetalum. 



